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Other instruments:

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Air flow meter

Accurate
scales

Calipers 

Analytical
scale

Coating
thickness
meters

Benchtop
Scales

Conductivity
meters 
Balanza de bolsillo HC-100AS
Crane
scales

Cup vane
anemometer

Floor scales

Current detector 

Hanging
Scales 

Distance meter
Balanza contadora
Humidity content
Scales

Earth meters

Kitchen
scales

Electronic
stethoscope

Laboratory
Scales

Gas analyser

Laboratory
scales   

Gas detector for refrigerants  

Multifunction
scales

Humidity
indicators

Packaging Scale

Humidity indicator
Balanza de precisión
Pallet balances

Infrared
thermometers

Pallet truck
scales

Insulation meter
Balanza de suelo
Paper Scale

Thermometers 

Platform scales

Tester for fuel 

Pocket
scales

Thermal
cameras 
Báscula pesa-ejes para coches
Postal scales

Oscilloscope 

Scale for
analysis

Microscopes

Scales for
transit

Microscopes
USB
 

Tabletop
scales

Noise meters

Tabletop Scale

Power analyzer  

Air flow transducers
Caudalímetro para líquidos
Power and
harmonics
 analyser

Digital
indicators

Radiation
analysers

Display systems

Radio frequency
meter

Logic modules

Rotation meter

Signal
converters

Videoscopes 

Temperature
transducers
Videoscopio
Voltmeter

Temperature sensors

Weather
stations

Vibration
transducers

Measuring Principle of Absolute and Differential Pressure

Measuring of Absolute and Differential Pressure.
Pressure sensors can register a membrane flexion produced by pressure at placing on the membrane a strain bridge. Pressure sensors modify their electrical resistance because of  the piezoresistive effect in the case of flexion, pressure or traction. Some years ago, pressure sensors were made of constantana or platinum-iridium layers. Nowadays, silicon resistances are commonly used. An advantage of  using silicon resistances is that the manufacturing process will be cheaper  sensitivity higher than 10 factor. On the other hand, there is a disadvantage related to the higher higher temperature coefficient. With the differential pressure sensor the p1 pressure is determined at one side of the membrane while p2 is in the other side. To measure pressure with the absolute pressure sensor, we place four connected strain bands similar to a resistance bridge. The way they are connected allows to change their places in the bridge laterals. By means of this process, as it is shown in images 2 and 3, it is compensated an output signal in the same way that resistances absolute values and coefficient temperatures. Because of the few changes of the ∆R resistance, the output signal will remain lower. Depending on the sensor, the maximum pressure  will be between 25 and 250 mV with a voltage of Uref = 5 V. The relative change of the resistance is from 0,5 y 5 %.

Here you will find all the measuring instruments available at PCE Instruments.

Contact:
PCE Instruments UK Limited
Units 12/13 Southpoint Business Park
Ensign Way, Southampton
United Kingdom, SO31 4RF
Phone. +44 ( 0 ) 2380 98703 0
Fax +44 ( 0 ) 2380 98703 0

Comeback to Differential Pressure Meter 
 

Below you will find an overview of the different product groups of measuring instruments

Absolute Humidity Meters
Accelerometers
Alert Meters
Air velocity meters
Analyzers (Colour)
Analyzers (Gas)
Analyzers (Lan)
Analyzers (Noise)
Analyzers (Oxygen)
Analyzers (Ozono)

Anemometers
Barometers
Balances
Borescopes
Cable detectors (electrical)
Calibrators
Calipers
Cameras (Infrared Thermal Imaging)
Capacitance Meters
Coating Thickness Meters
Chlorine Meters
Clamp Meters
Climate Meters
Colour Meters

Conductivity Meters
Contact Thermometers
Current detectors
Data Loggers
Differential Pressure Meters
Digital Multimeters
Densimeters
Detectors (Gas, Humidity, Radiation, Voltage)
Dose Meters (Noise)
Earth meters
Electric Tester
Endoscopes
Environmental Meters
Fiberscopes
Flow Meters Air
Flow Meters Gas
Force Gauges (digital)
Frequency Meters
Geiger Counter
Handheld Tachometers
Hardness Meters
Humidity Testers (Building material)
Hygrometers
Indicator Sound Level
Indicator (Humidity)
Instruments (Environmental)

Impedance bridges
Infrared Thermometers
Insulation Meters
Lan Network Testers
Laser Distance Meters
Laser level
Laser meters
Laser thermometers
LCR Meters
Length Meters
Light Meters
Lux Meters
Magnetometers
Manometers
Material Thickness Meters
Measurement Dev.(Force)
Measuring Meters (Distance)
Measuring Wheels
Meters (Distance,
pH, Power Pressure, Radiation, Salt, Temperature, Gas, Gloss, Ground)
Micrometers
Microscopes
Modular signal Converters
Moisture Indicator
Multimeters
Multi-Parameter Photometers
Noise Meters
Odometers
Ohm Meters
Oscilloscopes
Oxygen Meters
Ozone Meters
Paper Moisture Meters
Penetrometers

Pitot tube air flow meters
Pocket pH-meters
Power Analyzers

Pressure Gauges
Pyrometers
Quality Meters (Air)
Radiation Counters
Radioactivity meters
Reader (Temperature)
Recorders Data
Redox Meters
Refractometers
Relative Humid. Meters
Rotation meters
Roughness tester
Scales
Sensor (Temperature)
Signal Level Analyzers
Single-parameter Photometers
Sound Level Meters
Systems Environmental
Stethoscopes (electro.)
Stroboscopes
Surface Thickn. Meters
Tachometers
Telescope Meters
Thermo-anemometers
Thermo-Hygrometers
Temperature Probes
Testers (Air,Conductivity, Earth,  Insulation, Noise, pH, paper Resistance, Sound, Temperature)
Thermal stress
Thermal Imag. Cameras
Thermometers
Thermocouples
Thickness Meters
Turdibity Meters

Ultrasonic Flow Meters

VDE tester
Vibration Meters
Video endoscopes
Voltage meters

Weather Stations
Wood (humidity)