Sensors of physical parameters -  Information portal  2016 - 2017                                                                                                            Use of material is possible by placing an active link
Strain gauge. Strain sensors

      As resistance of explorer is determined by correlation

R = rL/S

where r is specific resistance of material; L - length S is an area of cross-sectional, that resistance can change at any oscillation of measurand which influences on one or a few arguments included in this expression.
      The brought dependence over is used in strain gauge - transducers which convert a change made effort into the change of resistance (fig. 1). As a rule, such transducers is used together with the bridge of Uytstona, when one, two or even all four shoulders present by itself strain gauge, and output tension changes in reply to variations of measureable effort.
      Metallic transforming elements are used in strain gauge (sensors), at the appendix of the mechanical loading which a change of their length and area of cross-sectional is to, that leads, in turn to the change of resistance. Some materials of strain gauge, for example semiconductor, show a piezoelectric effect at which loading attached to material causes the large change of his specific resistance. Strain gauge of such type possess a greater sensitiveness on two orders, what before considered.
      In general case any parameter which reproduces motion or force can be used for creation of strain gauge transducers, sensors.

Semiconductor strain gauges

Load cells, strain gauges, sensors
Foil strain gauges
Measuring stress vibrating string. Tensometer

Experimental sensors
- Strain gauges

Strain gauge
Glues, connective for editing of strain sensors
Attestation, calibration, check of strain sensors

Measurement of mechanical strain ( stress ) using a strain gage

The apparatus for measuring strain in static mode

Strain softening materials

Installation of hydro-protection resistor strain gages and strain gauge transducers


Thermistors, thermo-resistors
Semiconductor thermistors (sensors)
Platinum thermometers of resistance
Platinum and copper thermo resistances
Experimental sensors
- Thermistors
Thermo-resistors. Principle of work
Low-temperature (cryogenic) resistance thermometers (thermistors)
Transducers. Thermistors

Thermoelectric converters - generators of EMF
Thermoelectric cooling devices

Thermocouples - calibration (table)
-chromel - alumel
-platinum 30% rhodium platinum 60% rhodium
-chromel - constantan
-copper - constantan
-chromel - kopel 

Thermocouple TCA
Thermocouple TCC
Make of thermocouple
Alloys for thermocouples
Calibrating (table) of thermocouple
Calculation of the temperature on the value of the thermopower

Pyrometer Raytek
Pyrometer MiniTemp MT6
Imager Testo 890
Thermal imaging binoculars. Module M100

Phenomenon of Pel't'e

Electronic thermometer
change made effort into the change of resistance