Temperature Sensor USB Connection Cable Type Product Characteristics:
Usually used platinum resistance temperature sensors have PT100, resistance temperature coefficient of 3.9 × 10-3 / ℃, 0 ℃ when the resistance value of 100 Ω, resistance rate of change of 0.3851 Ω / ℃. Platinum resistance temperature sensor high precision, good stability, wide range of application temperature, is the low and medium temperature zone (the most commonly used a temperature detector, not only widely used in industrial temperature measurement, and was made into a variety of standard thermometers.
USB connecting wire temperature sensor according to IEC751 international standards, temperature coefficient TCR = 0.003851, Pt100 (R0 = 100Ω), Pt1000 (R0 = 1000Ω) for the unified design type platinum resistance.
Temperature Sensor USB
USB connection line type temperature sensor structure:
Two-wire system:
Sensor resistance change value and the resistance value of the connecting wire together constitute the output value of the sensor, due to the additional error brought about by the resistance of the wire so that the actual measured value is high, for the occasions where the requirements of measurement accuracy is not high, and the length of the wire should not be too long.
Three-wire system:
The use of three-wire system will greatly reduce the wire resistance brought about by the additional error, the industry generally use three-wire connection.
Four-wire system:
When the measured resistance value is very small, the resistance of the test line may introduce significant errors, four-wire measurement with two additional test lines to provide a constant current, the other two test lines to measure the voltage drop of the unknown resistor, in the voltmeter input impedance is high enough under the conditions of the current almost does not flow through the voltmeter, so that you can accurately measure the voltage drop on the unknown resistor, the calculation of the resistance value.
Basic structure:
Adopting stainless steel tube or copper-aluminum tube encapsulation, filled with thermal conductive and insulating materials inside, with excellent waterproof and shockproof performance, suitable for liquid, gas, freezing and refrigeration, as well as a variety of environmental temperature measurements, it is the sensor with the widest range of applications.