Transmitter HF73A – Heavy duty transmitter

The HF73A transmitter series is designed for fixed installation in industrial applications where conditions are within the range of 0 to 100 %RH and -100 to 150°C (-148 to 302°F). The probe of the HF73A can survive exposure to temperature up to 200°C (392°F). Equipped with an aluminum enclosure and a PPS probe, the HF73A can handle the toughest industrial environments.

The HF73A transmitter is available in different configurations and has extensive settings and functions that can be configured and enabled with the ROTRONIC HW4 software after connecting the HF73A to a PC.

Measures relative humidity, temperature and dew/frost point in industrial environments and outdoors. For the use in harsh conditions.

• Accuracy: ±1.0 %rh / ±0.2 K at 23°C ±5 K
• Temperature limit at probe: max. -100…200 °C / 0…100 %rh
• Range of application electronics: -40…85 °C / 0…100 %rh
•Metal housing (aluminium diecast) and probe made of PPS
• Various probe lengths available
• Use as simulator for system validation *
•Adjusted at 23 °C and 10, 35, 80 %rh


External memory function for logging Yes, 2000 data point memory
Firmware upgradable Yes, via HW4 software
Load Compensation Yes
Operating range -40…85 °C / 0…100 %rh
Resolution Airchip 3000 <0.02 %rh / 0.01 K
Long-term stability humid. sensor <1 %rh / year
Measurement range -100...200 °C / 0...100 %rh (non-condensing)
Power supply 15...40 VDC / 12...28 VAC
Humidity sensor Hygromer HT-1
Temperature sensor PT100 1/3 Class B
Calculations Dew point or frost point, freely scalable
Sensor diagnostics (drift, state) Programmable; factory default - Off
Audit Trail/ electronic records FDA 21 CFR Part 11 and GAMP compatible
Analogue outputs scaleable by the user 0…1 V, 0…5 V, 0…10 V, 0…20 mA, 4…20 mA
Circuit type 3-wire
PC interfaces UART. HW4-compatible
Cable connections 1 x M16 x 1.5, to terminals
Fire protection class Complies UL94-HB
Housing Aluminum
Temperature adjustment 1-point or 2-point humidity adjustment / calibration
Humidity adjustment 1-point or multi-point humidity adjustment / calibration
Output signals Yes
Load per analog output V signal: ≥1kΩ / V; mA signal: ≤500 Ω
Standards CE Confirmity 2014/30/EU
IP protection class IP65
Weight 800.0000

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