The HT-200 relative Humidity/Temperature probe combines a high accuracy, capacitance type humidity sensor and a precision solid state temperature sensor in one probe. The integrated sensor block has excellent long term stability and is highly resistant to chemical vapors and other contaminants. Dual outputs provide humidity and temperature as 0-1V linear voltages. The probe can be easily installed in naturally ventilated (multi-plate) and aspirated radiation shields. The humidity measurement is accurate to ±2% from 20% to 80% RH. The temperature accuracy is ±1°C from 0°C to +70°C and ±0.6°C at 25°C. The probe is particularly suited for battery applications, drawing only 500 μA of supply current.


  • Designed for meteorogical applications
  • Relative humidity and temperature outputs
  • Fully recovers from condensing environments
  • Precision accuracy ±2% RH, ±0.6°C
  • Low power, 500 µA typical supply current
  • Wide supply range: 6-40VDC

Ordering Codes

Code Description
HT-200-FG17 Humidity & Temperature probe (Stainless steel mesh filter Cap)


Relative Humidity
Sensor Planar Capacitive Polymer
Range 0 to 100% RH
Accuracy @ 25°C ±2% from 20% to 80%, ±3% from 0% to 20% and 80% to 100%
Resolution 0.4% RH
Response Time 20 sec with FG16 Cap (for clean environment), 1 min with FG17 Cap (Mesh filter against dirt),
3 min with FG18 Cap (PTFE filter for extreme conditions)
Sensor Integral band gap PTAT
Temperature Scale –50°C to 150°C
Accuracy ±0.6°C at 25°C, ±1°C from 0°C to +70°C
Resolution 0.2°C
Electrical Characteristics
Supply voltage 6...40 VDC
Supply current 550 µA max
Reverse Polarity Protection 50 V max
Humidity output 0-1V, %RH = Vout x 100
Temperature Output 0-1V, Tc = Vout x 200 – 50
Min. Load Resistance 5 kΩ
Max. Output Load Capacitance 5 nF
Cable length 1.2 m
Environmental Conditions
Storage Temperature –55°C to 85°C
Operating Temperature –40°C to 85°C
Operating RH Range 0 to 100% RH, non-condensing
Document File
HT-200, Humidity & Temperature probe HT200_LF.pdf