G01L

MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE weighing G01G

Attention is drawn to the Notes following the title of class G01.

In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme.

G01L1/00

Measuring force or stress, in general measuring force due to impact G01L5/00

G01L1/005

by electrical means and not provided for in G01L1/06 - G01L1/22

G01L1/02

by hydraulic or pneumatic means

G01L1/04

by measuring elastic deformation of gauges, e.g. of springs

G01L1/042

of helical springs

G01L1/044

of leaf springs

G01L1/046

of spiral springs

G01L1/048

of torsionally deformable elements

G01L1/06

by measuring the permanent deformation of gauges, e.g. of compressed bodies

G01L1/08

by the use of counterbalancing forces

G01L1/083

using hydraulic or pneumatic counterbalancing forces

G01L1/086

using electrostatic or electromagnetic counterbalancing forces

G01L1/10

by measuring variations of frequency of stressed vibrating elements, e.g. of stressed strings using resistance strain gauges G01L1/22

G01L1/103

optical excitation or measuring of vibrations

G01L1/106

Constructional details

G01L1/12

by measuring variations in the magnetic properties of materials resulting from the application of stress

G01L1/122

by using permanent magnets

G01L1/125

by using magnetostrictive means magnetostrictive sensors H10N35/101

G01L1/127

by using inductive means G01L1/122, G01L1/125 take precedence

G01L1/14

by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators

G01L1/142

using capacitors

G01L1/144

with associated circuitry G01L1/146 and G01L1/148 take precedence

G01L1/146

for measuring force distributions, e.g. using force arrays G01L1/148 takes precedence

G01L1/148

using semiconductive material, e.g. silicon

G01L1/16

using properties of piezo-electric devices

G01L1/162

using piezo-electric resonators

G01L1/165

with acoustic surface waves

G01L1/167

optical excitation or measuring of vibrations

G01L1/18

using properties of piezo-resistive materials, i.e. materials of which the ohmic resistance varies according to changes in magnitude or direction of force applied to the material

G01L1/183

by measuring variations of frequency of vibrating piezo-resistive material

G01L1/186

optical excitation or measuring of vibrations

G01L1/20

by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids of piezo-resistive materials G01L1/18

by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress

G01L1/205

using distributed sensing elements

G01L1/22

using resistance strain gauges

G01L1/2206

Special supports with preselected places to mount the resistance strain gauges; Mounting of supports

G01L1/2212

particularly adapted to unbounded-wire-type strain gauges

G01L1/2218

the supports being of the column type, e.g. cylindric, adapted for measuring a force along a single direction

G01L1/2225

the direction being perpendicular to the central axis

G01L1/2231

the supports being disc- or ring-shaped, adapted for measuring a force along a single direction

G01L1/2237

the direction being perpendicular to the central axis

G01L1/2243

the supports being parallelogram-shaped

G01L1/225

Measuring circuits therefor

G01L1/2256

involving digital counting

G01L1/2262

involving simple electrical bridges

G01L1/2268

Arrangements for correcting or for compensating unwanted effects

G01L1/2275

for non linearity

G01L1/2281

for temperature variations

G01L1/2287

constructional details of the strain gauges adjustable resistors H01C10/00

G01L1/2293

of the semi-conductor type semi-conductor devices controllable by variations of applied mechanical force H01L29/84

G01L1/24

by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis

using infra-red, visible light, ultra-violet

G01L1/241

by photoelastic stress analysis

G01L1/242

the material being an optical fibre

G01L1/243

using means for applying force perpendicular to the fibre axis

G01L1/245

using microbending

G01L1/246

using integrated gratings, e.g. Bragg gratings

G01L1/247

using distributed sensing elements, e.g. microcapsules along a single optical fibre G01L1/242

G01L1/248

using infra-red G01L1/241, G01L1/242 take precedence

G01L1/25

using wave or particle radiation, e.g. X-rays

, microwaves

, neutrons G01L1/24 takes precedence

G01L1/255

using acoustic waves, or acoustic emission G01L1/10 and G01L1/16 take precedence

G01L1/26

Auxiliary measures taken, or devices used, in connection with the measurement of force, e.g. for preventing influence of transverse components of force, for preventing overload

G01L3/00

Measuring torque, work, mechanical power, or mechanical efficiency, in general

G01L3/02

Rotary-transmission dynamometers

G01L3/04

wherein the torque-transmitting element comprises a torsionally-flexible shaft

G01L3/045

by measuring variations of frequency of stressed vibrating elements

G01L3/06

involving mechanical means for indicating

G01L3/08

involving optical means for indicating

G01L3/10

involving electric or magnetic means for indicating

G01L3/101

involving magnetic or electromagnetic means

G01L3/102

involving magnetostrictive means magnetostrictive sensors H10N35/101

G01L3/103

Details about the magnetic material used

G01L3/104

involving permanent magnets

G01L3/105

involving inductive means G01L3/102, G01L3/104 take precedence

G01L3/106

involving electrostatic means

G01L3/107

involving potentiometric means

G01L3/108

involving resistance strain gauges

G01L3/109

involving measuring phase difference of two signals or pulse trains

G01L3/12

involving photoelectric means

G01L3/14

wherein the torque-transmitting element is other than a torsionally-flexible shaft

G01L3/1407

involving springs

G01L3/1414

using mechanical or hydraulic transducers

G01L3/1421

using optical transducers

G01L3/1428

using electrical transducers

G01L3/1435

involving magnetic or electromagnetic means

G01L3/1442

involving electrostatic means

G01L3/145

involving potentiometric means

G01L3/1457

involving resistance strain gauges

G01L3/1464

involving screws and nuts, screw-gears or cams

G01L3/1471

using planet wheels or conical gears

G01L3/1478

involving hinged levers

G01L3/1485

involving fluidic means

G01L3/1492

involving electric couplings

G01L3/16

Rotary-absorption dynamometers, e.g. of brake type

G01L3/18

mechanically actuated

G01L3/20

fluid actuated

G01L3/205

of the air brake type

G01L3/22

electrically or magnetically actuated

G01L3/24

Devices for determining the value of power, e.g. by measuring and simultaneously multiplying the values of torque and revolutions per unit of time, by multiplying the values of tractive or propulsive force and velocity

G01L3/242

by measuring and simultaneously multiplying torque and velocity

G01L3/245

by measuring and simultaneously multiplying pressure and velocity

G01L3/247

by measuring and simultaneously multiplying tractive or propulsive force and velocity

G01L3/26

Devices for measuring efficiency, i.e. the ratio of power output to power input

G01L5/00

Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes

G01L5/0004

Force transducers adapted for mounting in a bore of the force receiving structure G01L5/0009 takes precedence

G01L5/0009

Force sensors associated with a bearing testing of bearings G01M13/04

G01L5/0014

by using capacitive sensors

G01L5/0019

by using strain gages, piezo-electric, piezo-resistive or other ohmic-resistance based sensors

G01L5/0023

by using magnetic sensors

G01L5/0028

Force sensors associated with force applying means G01L5/0052, G01L5/0057, G01L5/0061 take precedence

G01L5/0033

applying a pulling force

G01L5/0038

applying a pushing force

G01L5/0042

applying a torque

G01L5/0047

measuring forces due to residual stresses

G01L5/0052

measuring forces due to impact G01L5/0061, G01L5/14 take precedence; impact testing of structures G01M7/08; impact testing of material G01N3/00

G01L5/0057

measuring forces due to spring-shaped elements

G01L5/0061

Force sensors associated with industrial machines or actuators for the specific machine or actuator involved see relevant class, e.g. F01, F04, F16, B66, E21

G01L5/0066

Calibration arrangements

G01L5/0071

Specific indicating arrangements, e.g. of overload

G01L5/0076

Force sensors associated with manufacturing machines G01L5/0066, G01L5/0071 and B23Q17/09 take precedence; for the specific machine or operation involved see relevant class, e.g. B21 - B42

G01L5/008

Force sensors integrated in an article or a dummy workpiece

G01L5/0085

Force sensors adapted for insertion between cooperating machine elements, e.g. for measuring the nip force between rollers

G01L5/009

Force sensors associated with material gripping devices

G01L5/0095

measuring work or mechanical power

G01L5/03

for measuring release force of ski safety bindings

G01L5/04

for measuring tension in flexible members, e.g. ropes, cables, wires, threads, belts or bands

G01L5/0004 takes precedence

G01L5/042

by measuring vibrational characteristics of the flexible member

G01L5/045

for measuring the tension across the width of a band-shaped flexible member measuring flatness G01B

G01L5/047

Specific indicating or recording arrangements, e.g. for remote indication, for indicating overload or underload

G01L5/06

using mechanical means

G01L5/042, G01L5/045 take precedence

G01L5/08

using fluid means

G01L5/042, G01L5/045 take precedence

G01L5/10

using electrical means

G01L5/101

using sensors inserted into the flexible member

G01L5/102

using sensors located at a non-interrupted part of the flexible member

G01L5/103

using sensors fixed at one end of the flexible member

G01L5/105

using electro-optical means

G01L5/106

for measuring a reaction force applied on a cantilever beam

G01L5/107

for measuring a reaction force applied on an element disposed between two supports, e.g. on a plurality of rollers or gliders

G01L5/108

for measuring a reaction force applied on a single support, e.g. a glider

G01L5/12

for measuring axial thrust in a rotary shaft, e.g. of propulsion plants

G01L5/13

for measuring the tractive or propulsive power of vehicles

G01L5/133

for measuring thrust of propulsive devices, e.g. of propellers aeroplanes B64C; marine propulsion B63H; jet-engines F02K

G01L5/136

Force sensors associated with a vehicle traction coupling vehicle connections B60D; control of vehicle brakes B60T

G01L5/14

for measuring the force of explosions

for measuring the energy of projectiles

G01L5/16

for measuring several components of force

G01L5/161

using variations in ohmic resistance

G01L5/162

of piezoresistors

G01L5/1623

of pressure sensitive conductors using piezoresistors G01L5/162

G01L5/1627

of strain gauges using piezoresistors G01L5/162

G01L5/163

of potentiometers

G01L5/164

using variations in inductance

G01L5/165

using variations in capacitance

G01L5/166

using photoelectric means

G01L5/167

using piezo-electric means

G01L5/168

using counterbalancing forces

G01L5/169

using magnetic means

G01L5/171

using fluid means

G01L5/173

using acoustic means

G01L5/18

for measuring ratios of force

G01L5/20

for measuring wheel side-thrust

G01L5/22

for measuring the force applied to control members, e.g. control members of vehicles, triggers

G01L5/221

to steering wheels, e.g. for power assisted steering

G01L5/223

to joystick controls

G01L5/225

to foot actuated controls, e.g. brake pedals

G01L5/226

to manipulators, e.g. the force due to gripping

G01L5/228

using tactile array force sensors

G01L5/24

for determining value of torque or twisting moment for tightening a nut or other member which is similarly stressed

G01L5/243

using washers

G01L5/246

using acoustic waves

G01L5/26

for determining the characteristic of torque in relation to revolutions per unit of time

G01L5/28

for testing brakes

G01L5/282

the vehicle wheels cooperating with rotatable rolls

G01L5/284

Measuring braking-time or braking distance

G01L5/286

Measuring deceleration

G01L5/288

Measuring the force necessary to rotate a braked wheel

G01L7/00

Measuring fluid pressure

G01L7/00

Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements

G01L11/004 takes precedence;

transmitting or indicating the displacement of mechanical pressure-sensitive elements by electric

, e.g., photoelectric

or magnetic means G01L9/00; measuring differences of two or more pressure values G01L13/00; measuring two or more pressure values simultaneously G01L15/00

G01L7/02

in the form of elastically-deformable gauges

G01L7/022

constructional details, e.g. mounting of elastically-deformable gauges G01L7/041, G01L7/061, G01L7/082, G01L7/102, G01L7/163, G01L7/182 take precedence

G01L7/024

with mechanical transmitting or indicating means G01L7/043, G01L7/063, G01L7/084, G01L7/104, G01L7/166, G01L7/185 take precedence

G01L7/026

with optical transmitting or indicating means G01L7/045, G01L7/065, G01L7/086, G01L7/106, G01L7/187 take precedence

G01L7/028

correcting or regulating means G01L7/048, G01L7/068, G01L7/088, G01L7/108 take precedence

G01L7/04

in the form of flexible, deformable tubes, e.g. Bourdon gauges

G01L7/041

Construction or mounting of deformable tubes

G01L7/043

with mechanical transmitting or indicating means

G01L7/045

with optical transmitting or indicating means

G01L7/046

with exhausted tubes

G01L7/048

correcting or regulating means for flexible, deformable tubes

G01L7/06

of the bellows type

G01L7/061

construction or mounting of bellows

G01L7/063

with mechanical transmitting or indicating means

G01L7/065

with optical transmitting or indicating means

G01L7/066

with exhausted bellows

G01L7/068

correcting or regulating means for bellows

G01L7/08

of the flexible-diaphragm type

G01L7/082

construction or mounting of diaphragms of semiconductive diaphragms G01L9/0042

G01L7/084

with mechanical transmitting or indicating means

G01L7/086

with optical transmitting or indicating means

G01L7/088

correcting or regulating means for flexible diaphragms

G01L7/10

of the capsule type

G01L7/102

construction or mounting of capsules

G01L7/104

with mechanical transmitting or indicating means

G01L7/106

with optical transmitting or indicating means

G01L7/108

correcting or regulating means for capsules

G01L7/12

with exhausted chamber

Aneroid barometers

G01L7/14

with zero-setting means

G01L7/16

in the form of pistons

G01L7/163

construction or mounting of pistons

G01L7/166

with mechanical transmitting or indicating means

G01L7/18

using liquid as the pressure-sensitive medium, e.g. liquid-column gauges

G01L7/182

constructional details, e.g. mounting

G01L7/185

with mechanical transmitting or indicating means

G01L7/187

with optical transmitting or indicating means

G01L7/20

involving a closed chamber above the liquid level, the chamber being exhausted or housing low-pressure gas

Liquid barometers

G01L7/22

involving floats, e.g. floating bells

G01L7/24

involving balances in the form of rings partly filled with liquid

G01L9/00

Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements

G01L11/004 takes precedence

Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means measuring differences of two or more pressure values G01L13/00; measuring two or more pressure values simultaneously G01L15/00

G01L9/0001

Transmitting or indicating the displacement of elastically deformable gauges by electric, electro-mechanical, magnetic or electro-magnetic means G01L9/0026, G01L9/0033, G01L9/0082, G01L9/0089, G01L9/0091 take precedence

G01L9/0002

using variations in ohmic resistance G01L9/0051 takes precedence

G01L9/0004

using variations in inductance G01L9/007 takes precedence

G01L9/0005

using variations in capacitance G01L9/0072 takes precedence

G01L9/0007

using photoelectric means G01L9/0076 takes precedence

G01L9/0008

using vibrations

G01L9/001

of an element not provided for in the following subgroups of G01L9/0008

G01L9/0011

Optical excitation or measuring

G01L9/0013

of a string

G01L9/0014

Optical excitation or measuring of vibrations

G01L9/0016

of a diaphragm

G01L9/0017

Optical excitation or measuring

G01L9/0019

of a semiconductive element

G01L9/002

Optical excitation or measuring

G01L9/0022

of a piezoelectric element

G01L9/0023

Optical excitation or measuring

G01L9/0025

with acoustic surface waves

G01L9/0026

Transmitting or indicating the displacement of flexible, deformable tubes by electric, electromechanical, magnetic or electromagnetic means G01L9/0008 takes precedence

G01L9/0027

using variations in ohmic resistance

G01L9/0029

using variations in inductance

G01L9/003

using variations in capacitance

G01L9/0032

using photoelectric means

G01L9/0033

Transmitting or indicating the displacement of bellows by electric, electromechanical, magnetic, or electromagnetic means G01L9/0008 takes precedence

G01L9/0035

using variations in ohmic resistance

G01L9/0036

using variations in inductance

G01L9/0038

using variations in capacitance

G01L9/0039

using photoelectric means

G01L9/0041

Transmitting or indicating the displacement of flexible diaphragms

G01L9/0042

Constructional details associated with semiconductive diaphragm sensors, e.g. etching, or constructional details of non-semiconductive diaphragms details about the integration or bonding of piezoresistor in or on the diaphragm G01L9/0052 and G01L9/0057 respectively

G01L9/0044

Constructional details of non-semiconductive diaphragms

G01L9/0045

Diaphragm associated with a buried cavity

G01L9/0047

Diaphragm with non uniform thickness, e.g. with grooves, bosses or continuously varying thickness

G01L9/0048

Details about the mounting of the diaphragm to its support or about the diaphragm edges, e.g. notches, round shapes for stress relief

G01L9/005

Non square semiconductive diaphragm

G01L9/0051

using variations in ohmic resistance

G01L9/0052

of piezoresistive elements circuits therefor G01L9/06

G01L9/0054

integral with a semiconducting diaphragm

G01L9/0055

bonded on a diaphragm

G01L9/0057

of potentiometers

G01L9/0058

of pressure sensitive conductive solid or liquid material, e.g. carbon granules

G01L9/006

of metallic strain gauges fixed to an element other than the pressure transmitting diaphragm

G01L9/0061

using unbounded-wire-type strain gauges

G01L2009/0063

using a fluid coupling between strain gauge carrier and diaphragm

G01L9/0064

the element and the diaphragm being in intimate contact

G01L2009/0066

Mounting arrangements of diaphragm transducers; Details thereof, e.g. electromagnetic shielding means

G01L2009/0067

with additional isolating diaphragms

G01L2009/0069

the transducer being mounted on a flexible element

G01L9/007

using variations in inductance

G01L9/0072

using variations in capacitance

G01L9/0073

using a semiconductive diaphragm

G01L9/0075

using a ceramic diaphragm, e.g. alumina, fused quartz, glass

G01L9/0076

using photoelectric means

G01L9/0077

for measuring reflected light

G01L9/0079

with Fabry-Perot arrangements

G01L9/008

using piezoelectric devices piezoelectric resonators G01L9/0022; surface acoustic waves G01L9/0025

G01L9/0082

Transmitting or indicating the displacement of capsules by electric, electromechanical, magnetic, or electromechanical means G01L9/0008 takes precedence

G01L9/0083

using variations in ohmic resistance

G01L9/0085

using variations in inductance

G01L9/0086

using variations in capacitance

G01L9/0088

using photoelectric means

G01L9/0089

Transmitting or indicating the displacement of pistons by electrical, electromechanical, magnetic or electromagnetic means G01L9/0008 takes precedence

G01L9/0091

Transmitting or indicating the displacement of liquid mediums by electrical, electromechanical, magnetic or electromagnetic means G01L9/0008 takes precedence

G01L9/0092

using variations in ohmic resistance

G01L9/0094

using variations in inductance

G01L9/0095

using variations in capacitance

G01L9/0097

using photoelectric means

G01L9/0098

using semiconductor body comprising at least one PN junction as detecting element

G01L9/02

by making use of variations in ohmic resistance, e.g. of potentiometers

, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning

G01L9/025

with temperature compensating means non electric temperature compensating means G01L19/04

G01L9/04

of resistance-strain gauges

G01L9/045

with electric temperature compensating means non electric temperature compensating means G01L19/04

G01L9/06

of piezo-resistive devices

G01L9/065

with temperature compensating means non electric temperature compensating means G01L19/04

G01L9/08

by making use of piezo-electric devices

, i.e. electric circuits therefor

G01L9/085

with temperature compensating means non electric temperature compensating means G01L19/04

G01L9/10

by making use of variations in inductance

, i.e. electric circuits therefor

G01L9/105

with temperature compensating means non electric temperature compensating means G01L19/04

G01L9/12

by making use of variations in capacitance

, i.e. electric circuits therefor

G01L9/125

with temperature compensating means non electric temperature compensating means G01L19/04

G01L9/14

involving the displacement of magnets, e.g. electromagnets

G01L9/16

by making use of variations in the magnetic properties of material resulting from the application of stress

G01L9/18

by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electric potential is produced or varied upon the application of stress

G01L11/00

Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00

G01L11/002

by thermal means, e.g. hypsometer

G01L11/004

by the use of counterbalancing forces measuring force by the use of counterbalancing forces G01L1/08

G01L11/006

hydraulic or pneumatic counterbalancing forces

G01L11/008

electrostatic or electromagnetic counterbalancing forces

G01L11/02

by optical means

G01L11/025

using a pressure-sensitive optical fibre

G01L11/04

by acoustic means

G01L11/06

Ultrasonic means

G01L13/00

Devices or apparatus for measuring differences of two or more fluid pressure values

G01L13/02

using elastically-deformable members or pistons as sensing elements

G01L13/021

using deformable tubes

G01L13/023

using bellows

G01L13/025

using diaphragms

G01L13/026

involving double diaphragm

G01L13/028

using capsules

G01L13/04

using floats or liquids as sensing elements

G01L13/06

using electric or magnetic pressure-sensitive elements

G01L15/00

Devices or apparatus for measuring two or more fluid pressure values simultaneously

G01L17/00

Devices or apparatus for measuring tyre pressure or the pressure in other inflated bodies

G01L17/005

using a sensor contacting the exterior surface, e.g. for measuring deformation

G01L19/00

Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges

G01L19/0007

Fluidic connecting means

G01L19/0015

using switching means

G01L19/0023

for flowthrough systems having a flexible pressure transmitting element

G01L19/003

using a detachable interface or adapter between the process medium and the pressure gauge

G01L19/0038

being part of the housing other details about the housing G01L19/14

G01L19/0046

using isolation membranes G01L13/026 and G01L19/0645 take precedence

G01L2019/0053

Pressure sensors associated with other sensors, e.g. for measuring acceleration, temperature

G01L19/0061

Electrical connection means

G01L19/0069

from the sensor to its support

G01L19/0076

using buried connections

G01L19/0084

to the outside of the housing other details about the housing see

G01L19/14

G01L19/0092

Pressure sensor associated with other sensors, e.g. for measuring acceleration or temperature G01L9/025, G01L9/045, G01L9/065, G01L9/085, G01L9/105, G01L9/125, G01L19/02, G01L19/04 take precedence; measuring two or more variable G01D21/02; temperature sensors with pressure compensation G01K1/26

G01L19/02

Arrangements for preventing, or for compensating for, effects of inclination or acceleration of the measuring device

Zero-setting means for aneroid barometers G01L7/14

G01L19/04

Means for compensating for effects of changes of temperature

, i.e. other than electric compensation

G01L19/06

Means for preventing overload or deleterious influence of the measured medium on the measuring device or vice versa

G01L19/0609

Pressure pulsation damping arrangements

G01L19/0618

Overload protection

G01L19/0627

Protection against aggressive medium in general

G01L19/0636

using particle filters

G01L19/0645

using isolation membranes, specially adapted for protection

G01L19/0654

against moisture or humidity

G01L19/0663

Flame protection; Flame barriers

G01L19/0672

Leakage or rupture protection or detection

G01L19/0681

Protection against excessive heat

G01L19/069

Protection against electromagnetic or electrostatic interferences

G01L19/08

Means for indicating or recording, e.g. for remote indication

G01L19/083

electrical

G01L19/086

for remote indication

G01L19/10

mechanical

G01L19/12

Alarms or signals

G01L19/14

Housings

G01L19/0007, G01L19/0084, G01L19/0092, G01L19/04, G01L19/06 take precedence

G01L19/141

Monolithic housings, e.g. molded or one-piece housings

G01L19/142

Multiple part housings

G01L19/143

Two part housings

G01L19/144

with dismountable parts, e.g. for maintenance purposes or for ensuring sterile conditions for detachable interface or adapter between the process medium and the pressure gauge G01L19/003

G01L19/145

with stress relieving means

G01L19/146

using flexible element between the transducer and the support

G01L19/147

Details about the mounting of the sensor to support or covering means

G01L19/148

Details about the circuit board integration, e.g. integrated with the diaphragm surface or encapsulation

G01L19/149

of immersion sensor, e.g. where the sensor is immersed in the measuring medium or for in vivo measurements, e.g. by using catheter tips

G01L19/16

Dials

Mounting of dials

G01L21/00

Vacuum gauges

G01L21/02

having a compression chamber in which gas, whose pressure is to be measured, is compressed

G01L21/04

wherein the chamber is closed by liquid

Vacuum gauges of the McLeod type

G01L21/06

actuated by rotating or inverting the measuring device

G01L21/08

by measuring variations in the transmission of acoustic waves through the medium, the pressure of which is to be measured

G01L21/10

by measuring variations in the heat conductivity of the medium, the pressure of which is to be measured

G01L21/12

measuring changes in electric resistance of measuring members, e.g. of filaments

Vacuum gauges of the Pirani type

G01L21/14

using thermocouples

G01L21/16

by measuring variation of frictional resistance of gases

G01L21/18

using a pendulum

G01L21/20

using members oscillating about a vertical axis

G01L21/22

using resonance effects of a vibrating body

Vacuum gauges of the Klumb type

G01L21/24

using rotating members

Vacuum gauges of the Langmuir type

G01L21/26

by making use of radiometer action, i.e. of the pressure caused by the momentum of molecules passing from a hotter to a cooler member

Vacuum gauges of the Knudsen type

G01L21/28

using torsional rotary measuring members

G01L21/30

by making use of ionisation effects

G01L21/32

using electric discharge tubes with thermionic cathodes

G01L21/34

using electric discharge tubes with cold cathodes

G01L21/36

using radioactive substances

G01L23/00

Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid

Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid

G01L23/02

mechanically indicating or recording and involving loaded or return springs

G01L23/04

involving means subjected to known counteracting pressure

G01L23/06

Indicating or recording by optical means

G01L23/08

operated electrically

G01L23/22 takes precedence

G01L23/085

by measuring fluctuations of starter motor current or of battery voltage battery testing arrangements G01R31/36; testing of electrical installation on transport means G01R31/005; battery testing arrangements G01R31/36

G01L23/10

by pressure-sensitive members of the piezo-electric type

G01L23/12

by changing capacitance or inductance

G01L23/125

by changing capacitance

G01L23/14

by electromagnetic elements

G01L23/145

by magnetostrictive elements

G01L23/16

by photoelectric means

G01L23/18

by resistance strain gauges

G01L23/20

combined with planimeters or integrators

G01L23/22

for detecting or indicating knocks in internal-combustion engines

Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines

G01L23/221

for detecting or indicating knocks in internal combustion engines

G01L23/222

using piezoelectric devices

G01L23/223

using magnetic or magnetostrictive means

G01L23/225

circuit arrangements therefor

G01L23/226

using specific filtering

G01L23/227

using numerical analyses

G01L2023/228

circuit arrangements therefor

G01L23/24

specially adapted

for measuring pressure in inlet or exhaust ducts of internal-combustion engines

G01L23/26

Details or accessories

G01L23/28

Cooling means

G01L23/30

Means for indicating consecutively positions of pistons or cranks of internal-combustion engines in combination with pressure indicators

G01L23/32

Apparatus specially adapted for recording pressure changes measured by indicators

G01L25/00

Testing or calibrating of apparatus for measuring force, torque, work, mechanical power, or mechanical efficiency

G01L25/003

for measuring torque

G01L25/006

for measuring work or mechanical power or mechanical efficiency

G01L27/00

Testing or calibrating of apparatus for measuring fluid pressure

G01L27/002

Calibrating, i.e. establishing true relation between transducer output value and value to be measured, zeroing, linearising or span error determination

G01L27/005

Apparatus for calibrating pressure sensors

G01L27/007

Malfunction diagnosis, i.e. diagnosing a sensor defect

G01L27/02

of indicators