Capacitive dew-point transmitter HT-120

IP65NEMA 4Xstainless steel

Product summary
The HT-120 is a remote-type precision transmitter for humidity and temperature measurements with optional dew point and pressure monitoring. It features a stainless steel sensor with sinter filter, chemical resistance and a wide operating temperature range. The unit is delivered calibrated to a traceable reference and includes a NIST calibration certificate. Standard delivery includes a 6 ft (1.8 m) cable. Typical applications include environmental chambers, compressed air systems, furnaces, HVAC and industrial process control.

Product overview
Parameters: Moisture %, Dew point °C
Method: Capacitive humidity sensor
Range: Dew point +30°C to -60°C; rH 5%–95%
Accuracy: ±1% FSD
Response time (T90): ≈45 s (0–1%)
Outputs: 4–20 mA; 0–10 V; RS232; Alarm
Supply voltage: 18–30 V

Sensor types

• HT 120
  • Humidity/Temperature stainless steel sensor with stainless steel sinter filter
  • RS232 and 0–10 Vdc outputs
  • rH measuring range: 5–95% with ±1% measurement uncertainty
  • Working temperature range: -20°C to 115°C
  • Dew point measuring range: +30°C to -60°C
  • Preset outputs: rH, temperature and dew point
• HTB 120
  • Humidity/Temperature/Air pressure stainless steel sensor with stainless steel sinter filter
  • RS232 and 0–10 Vdc outputs
  • rH measuring range: 5–95% with ±1% measurement uncertainty
  • Air pressure measuring range: 300 mbar – 1100 mbar
  • Working temperature range: -20°C to 115°C
  • Preset outputs: rH, temperature and pressure
• HTP 120
  • Humidity/Temperature/Overpressure stainless steel sensor with stainless steel sinter filter
  • RS232 and 0–10 Vdc outputs
  • rH measuring range: 5–95% with ±1% measurement uncertainty
  • Pressure measuring range: 0 – 13 bar
  • Working temperature range: -20°C to 120°C
  • Preset outputs: rH, temperature and pressure

Standard features

• Optional LCD display
• Wall, flange and pipe mounting options
• NEMA 4X / IP65 enclosure
• Proven capacitive sensor technology
• Programming via RS232

Application areas

• Clean rooms
• Pharmaceutical industry
• Automotive
• Process control
• HVAC systems
• Hospitals
• Climate chambers

Technical specifications

• Parameters: Moisture %, Dew point °C
• Measuring method: Capacitive humidity sensor
• Humidity range: 5% – 95% rH
• Dew point range: +30°C to -60°C
• Working / gas temperature range: model dependent, typical -20°C to 115°C; HTP 120 up to 120°C
• Accuracy: ±1% FSD
• Response time (T90): approx. 45 s (0–1%)
• Outputs: 4–20 mA, 0–10 V, RS232, Alarm
• Supply voltage: 18–30 V
• Resolution: analog, dependent on measuring range
• Flow rate: approx. 2–5 l/min
• Pressure rating: model dependent, up to 40 bar; HTP 120: 0–13 bar
• Calibration method: Dew Point Mirror; delivered with NIST traceable calibration certificate
• Display: LCD (optional)
• Protection class / enclosure: IP65 / NEMA 4X
• Connection: ¾"
• Dimensions: 17 cm
• Weight: approx. 1 kg
• Sensor construction: stainless steel sensor with stainless steel sinter filter
• Standard cable: 6 ft (1.8 m)