Take a look at our Technical Notes on Temperature
The Geosense® PT100 temperature sensor contains a platinum resistance thermometer that changes resistance value as its temperature changes and provides accurate and reliable long-term temperature measurements. These sensors are often used in the extremely harsh environments found within Geotechnical monitoring.
The platinum element is housed inside a rugged enclosure and sealed with a special sealing material to ensure efficient thermal distribution and has IP68 waterproofing.
The principle of operation is to measure the resistance of a platinum element and in accordance with DIN/IEC 6075.
The relationship between temperature and resistance is approximately linear over a wide temperature range.
The linearisation equation is:
Rt = R0 * (1 + A* t + B*t2 + C*(t-100)* t3)
Rt is the resistance at temperature t, R0 is the resistance at 0 °C, and
A = 3.9083 E–3
B = -5.775 E–7
C = -4.183 E–12 (below 0 °C), or
C = 0 (above 0 °C)
|Temperature range||-50 to +300 ºC|
|Temperature coefficient of resistance (TCR)||0.00385 O/O/°C, 0 - 100°C|
|Accuracy||±0.15°C at 0°C, ±0.35°C at 100°C|
|Housing||PVC or Stainless steel|