Temperature sending unit

The Temperature sending unit is designed for application in commercial technical instruments for the purpose of Temperatures' measuring for various kind of objects (air, gases, surface of bodies, etc.).

CHARACTERISTICS	Value
Operating temperature span (centigrade)	-50... + 180
Type of internal structure	Temperature-sensitive resistor
Rated electrical resistance of the resistors under 20 degrees (centigrade)	10000 OM
Acceptable deviations (dispersion) of resistance in a consignment, %	±0.15
Time constant (in water), in seconds	5
in Motionless air, in seconds	No more than 10
Temperature metering error, under 0 degrees, centigrade	±0.1 *
Insulation resistance of the Temperature sending unit, under +60 degrees centigrade	not less than 10 MOM
Dissipation power, MW	10
Length of the extendable conductors, mm	not less than 60
Geometrical sizes, mm	6X2X1,5
Time period of non-stop operation	unlimited
Probability of survival	not less than 0.98 during 10000 hours of mean-time-between-failures
Service life, years	not less than: 12

Algebraical expression for output signal of the Temperature sending unit is:
R=R₀*exp(at)

R₀ is electrical resistance under temperature of 0 degrees centigrade which is equal 9600 OM ±0.15 %
a - is "electrical resistance temperature coefficient" of the resistor, which is equal 0.00208 1/K;
t - is the value of temperature, centigrade.

Use of expression: [R = R₀ * (1 + 0.00208 * t)] is accepted for temperature span from + 20...up to + 50 degrees, centigrade.

* For individual gradation of the Temperature sending unit