Temperature and humidity probes

Grant temperature probes

Key features

  • Choice of thermistors, thermocouple and platinum resistance sensors
  • Wide range of physical styles
  • High quality robust construction for long life
  • Test and calibration traceable to national standards
  • Choice of cables and connectors for different applications

Probes specifications data sheet


  • larger electrical signal for a given temperature change than other sensors
  • fast response time
  • high accuracy (± 0.1°C)
  • preferred sensor over the operating range -50 to +150°C
  • long cable lengths possible without significant errors
  • mini thermistors available for miniature/needle probes


  • suitable for temperatures from -25°C up to +250°C
  • fast response time
  • moderate accuracy (± 0.5°C)
  • suitable for a wide range of applications from delicate to heavy industrial

Platinum resistance

  • suitable for temperatures from -50°C up to +250°C
  • good accuracy (± 0.3°C)
  • good long term stability
  • choice of Pt100 and Pt1000 sensors
  • choice of 2 and 4 wire where compensation of cable resistance required
  • Capacitive humidity and temperature probes

Humidity probes

Grant provides the following combined temperature/humidity probe (RHT-G-Z) for use with Squirrel data loggers:
These are available with 2, 5 or 10 metres of cable (example code for 2m RHT-G-Z2-0)

Rotronic HYGROMER™ with Pt100 sensor

  • measurement range -40 to +100°C (-0.4 to +1V); 0 to 100% r.h. (0 to 1V)
  • sensors protected against dust and pollution
  • fast response time: start-up 3s
  • good long term stability
  • robust polycarbonate housing
  • accuracy (at +23°C): humidity ±0.8% r.h.,temperature ±0.2°C
  • good long term stability: <1% r.h, 0.1°C/year
  • dimensions of sensor head: 85mm x 15mm
  • can be supplied as Dew point output instead of rh, upon request