Room humidity and temperature sensor RFTF - Modbus
temperature Temperature
temperature Luftfeuchtigkeit

Room humidity and temperature sensor HYGRASGARD® RFTF-Modbus

Product group: WG01

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169,14 €
201,28 € incl. VAT + shipping


Room humidity and temperature sensor HYGRASGARD® RFTF - Modbus
Quality product for the HVAC sector, accuracy ±2%
A long-term stable, digital humidity and temperature sensor guarantees exact measurement results. The sensor is factory-calibrated; an environmental precision adjustment by an expert is possible. Modbus sensor with galvanically separated RS485 Modbus interface, selectable bus termination resistance, DIP switches for setting the bus parameters and bus address in a currentless state, internal LEDs for telegram status display and two-line display (illuminated, in the 7-segment and dot-matrix range, individually programmable).

Technical details

Voltage supply
24 V AC (± 20 %) and
15…36 V DC
Power consumption
< 1,0 W/ 24 V DC
< 2,2 VA/ 24 V AC
Data points
Temperature [°C], relative humidity [% RH],
dew point [°C], absolute humidity [g / m3],
mixture ratio [g / kg], enthalpy [kJ / kg]
Measuring range, humidity
0...100 % RH
Deviation of humidity
typical ± 2.0 % (20…80 % RH); at + 25 °C, otherwise ± 3.0 %

Measuring range, temperature
0...+50 °C
Temperature deviation
typically ± 0.2 K at +25 °C
digital humidity sensor
with integrated temperature sensor,
low hysteresis, high long-term stability
Measuring ranges
0...100 % RH (humidity)
0...+50 °C (temperature)
Zero point offset
± 10 % r.H. (humidity)
± 10 °C (temperature)
adjustable using potentiometer
Ambient temperature
storage –35...+85 °C;
operation 0...+50 °C
clean air and
non-aggressive, non-combustible gases
Signal filtering
4 s / 32 s
plastic, material ABS,
colour pure white (similar to RAL 9010)
98 x 98 x 33 mm (Baldur 2)
wall mounting or on in-wall flush box, Ø 55 mm,
base with 4 holes, for attachment to vertically or
horizontally installed in-wall flush boxes for rear cable entry,
with predetermined breaking point for cable entry
from top/ bottom in case of plain on-wall installation
Long-term stability
± 1 % per year
Permissible air humidity
< 95 % RH, non-precipitating air
Protection class
III (according to EN 60 730)
Protection type
IP 30 (according to EN 60 529)
CE conformity
according to EMC Directive 2014/ 30/ EU,
according to EN 61 326
switchable metric / imperial