Rotronic Hygroflex7 HF7 Humidity & Temperature Measurement Transmitter

Rotronic Hygroflex7 HF7 Humidity & Temperature Measurement Transmitter

Rotronic Hygroflex7 HF7 Humidity & Temperature Measurement Transmitter

Rotronic Hygroflex7 HF7 measures relative humidity and temperature HVAC transmitter achieves a high degree of accuracy that has rarely been seen before. Specifically 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 Hygroflex7 HF7 can handle the toughest industrial environments and the probe can be exposed to up 200°C (392°F) without risking damage.

Based on Airchip 3000 technology, the unique features of the Rotronic Hygroflex7 HF7 such as the advanced sensor technology and integration provide superb precision and state-of-the-art functionality.

HF7 transmitter has available with different settings and configurations thanks to compatibility with the Rotronic HW4 software.

Typical applications include measuring relative humidity, temperature and dew/frost point in industrial environments, outdoors and in harsh conditions.

Rotronic Hygroflex7 HF7 Humidity & Temperature Measurement Transmitter Product Benefits

  • Easy to read display – Display of the measured values on a clear, backlit graphic display with trend indicators along with configuration possible with a keypad.
  • Tried and tested housing – The robust industrial housing is suitable for wall or duct mounting
  • Fast response and precise measurement
    • Fixed mounted stainless steel probes for wall and duct mounts, cable probes with Teflon cables
    • Superb system accuracy
  • Output signals
    • Two freely selectable and scalable analog outputs
    • Dew/frost point and moisture calculation
    • 2-wire and 3/4-wire versions available
    • Use as a simulator for system validation
    • UART service interface


Rotronic Hygroflex7 HF7 transmitter

In addition to being used with the Rotronic HygroClip 2, the HC2-S probe can be used as a standalone device using either the analog output signals or the probe digital interface.

Connectors, cables and digital interface adapters are available to this purpose. Digital integration with OEM applications is facilitated by the probe communication protocol options.

Key user functions of the Rotronic Hygroflex7 HF7 humidity and temperature transmitter include:

  • Relative humidity and temperature measurement
  • Dew Point calculations
  • Outstanding accuracy and repeatability
  • Hygromer® IN-1 Humidity Sensor
  • All metal construction
  • Freely selectable and scalable analog outputs

Rotronic HYGROFLEX7 HF7 Humidity And Temperature Transmitter

Product Specifications

Probe TypeOperating RangeAccuracy at 23 ±5 °CMeasuring Range With Integrated ProbePower SupplyLong Term StabilityHumidty SensorTemperature Sensor
Industrial metal probe-40..85 °C / 0…100 %rF±1.0 %rh / ±0.2 K220g/500g15…40 VDC / 12…28 VAC<1 %rh / yearHygromer IN-1PT100 1/3 DIN Class B

WeightCable ConnectionsEnclosure MaterialProbe MaterialIP RatingStainless steel 1.4305 (V2A)Psychrometric Calculations
800.00001x M16x1.5 or ½ “conduit adapterAluminum die castingStainless steel 1.4305 (V2A)IP672 x 0…1 V, 0…5 V, 0…10 V, 0(4)…20 mADew or frost point

Rotronic Hygroflex7 HF7 Humidity & Temperature Probe

Rotronic Hygroflex7 HF7 probes measure humidity, temperature and also calculate dew/frost point.


  • 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; -10…60 °C with LCD
  • Metal housing (aluminum diecast) and probe of stainless steel or PPS
  • Various probe lengths available
  • Use as simulator for system validation *
  • Service interface
  • Adjusted at 23 °C and 10, 35, 80 %rh

What Is CO2 & How Is It Measured ? – Rotronic HygroFlex5-EX ATEX Humidity & Temperature Sensors

Rotronic Hygroflex7 HF7 Humidity  & Temperature hvac transmitter – probe options

Whether a simple plug and play probe is required to measure ambient conditions or a more sophisticated cable probe for high temperature or special applications, the options available for the Rotronic Hygroflex7 HF7 mean most requirements can be met.

All Hygroclip2 probes can be individually calibrated and adjusted to increase measurement precision.

The range of Hygroclip2 probes available include:

Rotronic Hygroprobe2 Operating range: - 50...100 °C Housing: polycarbonate or stainless steel

Rotronic Hygroprobe2 Operating range: – 50…100 °C
Housing: polycarbonate or stainless steel

Rotronic Hygroprobe for special applications

Rotronic Hygroprobe for special applications Operating range: -100…200 °C and 0…100 bar (0…1450 PSI)
Variations: polycarbonate or stainless steel
(1): HF520 transmitter is not compatible with industrial metal probes


The pharmaceutical industry is one of the largest users of humidity measurement equipment. Most drugs are sensitive to variations in humidity and moisture levels, so these need to be considered and controlled using measurement instruments, probes and sensors for the final products to be consistent in quality and performance.

Humidity Measurement Applications

Humidity instruments are used to both control (transmitters) and monitor (transmitters or data loggers) these conditions during “accelerated conditions” drug testing.

Production machines, driers, tableters, and coaters are all sensitive to humidity – quality control requires machine monitoring, area monitoring and final product Equilibrium Relative Humidity (ERH) measurement.

Clean room environments are humidity critical – environmental monitoring system (EMS) and measurement is validated to conform with regulatory requirements.


View the current Rotronic catalogue :


T&D distribute Rotronic probes, instruments, transmitters, data loggers, indicators and sensors for the measurement of dew point, flow, air velocity, process pressure, carbon dioxide and temperature. Click an icon for further information…..


Rotronic - Dew Point Measurement

Low Dew Point

Rotronic - Flow Measurement

Flow & Air Velocity

Rotronic - Process Pressure Measurement

Process Pressure

Rotronic - CO2 Measurement

Carbon Dioxide

Rotronic - Temperature Measurement


➡ Did you know? T&D supply VEGA process instrumentation for pressure, level and point level (switching) measurement.

Data Sheets