Ceiling built-in humidity and temperature sensors DFTF-Modbus
temperature Temperature
temperature Luftfeuchtigkeit

Ceiling built-in humidity and temperature sensors HYGRASGARD® DFTF-Modbus

Product group: WG02

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385,89 €
459,21 € incl. VAT + shipping


Ceiling built-in humidity and temperature sensors HYGRASGARD® DFTF - Modbus
The calibratable HYGRASGARD® DFTF - Modbus humidity and temperature transmitter measures the relative humidity and temperature of air. It converts the measurands into a standard signal of 0-10 V or 4...20 mA, and is available with/without optional display.

The measuring transducer supports four switchable temperature ranges. Relative humidity (in % r.H.) is the quotient of water vapour partial pressure divided by the saturation vapour pressure at the respective gas temperature. The sensor device provides precise detection of temperature and humidity. A digital, long-term stable sensor serves as measuring element for humidity and temperature. Fine adjustment by the user is possible.
The sensor has been designed for use in non-aggressive, dust-free environments and can be installed in suspended ceilings of corridors, offices, as well as residential and commercial buildings. The connecting head is pluggable for quick, easy mounting. The measuring transducer is accommodated in a separate housing.

Technical details

Power consumption
< 1.1 VA/ 24 V DC ; < 2.2 VA/ 24 V AC
Operating range, humidity
0...95 % RH (without dew formation)
Deviation of humidity
typical ± 2.0 % (20…80 % RH); at + 25 °C, otherwise ± 3.0 %

Measuring range, temperature
multi-range switching
with 4 switchable measuring ranges
–35...+35 °C; –35...+75 °C; 0...+50 °C; 0...+80 °C
(output corresponding to 0 -10 V or 4...20 mA)
Ambient temperature
storage –5...+60 °C
operation –5...+60 °C
Electrical connection
2-, 3- or 4-wire connection
0.14 -1.5 mm ² via terminal screws on circuit board
Cable connection
cable gland, plastic (M 16 x 1.5; with strain relief, exchangeable, max. inner diameter 10.4 mm) or
M12 connector according to DIN EN 61076-2-101 (optional on request)
Cable gland
M 16 x 1.5, including strain relief, exchangeable,
max. inner diameter 10.4 mm
Connecting head
made of plastic, material polycarbonate (PC), colour white,
pluggable, Ø = approx. 35 mm, H = approx. 29 mm,
with metal sinter filter made of stainless steel V4A (1.4404)
sensor cable
PVC, LiYY, 4 x 0.14 mm²,
KL = approx. 2 m
Long-term stability
± 1 % per year
Mounting (sensor)
inside suspended ceiling,
ceiling cutout Ø = 30 mm,
cover Ø = < 35 mm
Protection class
III (according to EN 60 730)
Protection type
IP 67 (according EN 60 529) Housing tested
TÜV SÜD, Report No. 713139052
IP 30 (according EN 60 529) Sensor in the built-in state
CE conformity,
according to EMC directive 2014/ 30/ EU,
according to EN 61326-1, according to EN 61326-2-3