Showcase humidity and temperature sensor VFTF - Modbus
temperature Temperature
temperature Luftfeuchtigkeit

Showcase humidity and temperature sensor HYGRASGARD® VFTF-Modbus

Product group: WG02

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510,08 €
607,00 € incl. VAT + shipping


Showcase humidity and temperature sensor HYGRASGARD® VFTF - Modbus
Calibratable HYGRASGARD® VFTF - Modbus
showcase humidity and temperature transmitter with Modbus connection, terminal box housing made of impact resistant plastic, housing cover with quick-locking screws, with/without optional display.

The universal showcase transducer serves to detect various parametres in humidity measuring. Measurands include relative humidity and ambient air temperature.
These measurands are used to calculate various parametres internally. The Modbus device can be used to retrieve the following parametres: relative humidity [% r.H.], absolute humidity [g/m³], mixture ratio [g/kg], dew point temperature [°C], enthalpy [kJ/kg] (ignoring atmospheric air pressure) and ambient temperature [°C].

The measuring transducers provides precise detection of temperature and humidity.
A digital, long-term stable sensor is used as a measuring element for humidity and temperature Fine adjustment by the user is possible.
The showcase sensor device is used in non-aggressive, dust-free environments and has been purpose-designed for installation in ceilings, walls, inside showcases or display cabinets in museums, galleries, cinemas, auditoriums or laboratories. The measuring element is contained inside a stainless steel probe, and its low height (approx. 2.5 mm) makes it barely noticeable.

Technical details

Voltage supply
24 V AC (± 20 %) and
15…36 V DC
Power consumption
< 1.1 VA/ 24 V DC ; < 2.2 VA/ 24 V AC
Deviation of humidity
typical ± 2.0 % (20…80 % RH); at + 25 °C, otherwise ± 3.0 %

Temperature deviation
typically ± 0.6 K at +25 °C
digital humidity sensor
with integrated temperature sensor,
low hysteresis, high long-term stability
Sensor protection
probe made of stainless steel, V4A (1.4571), pluggable;
sensor head Ø = 17 mm, H = approx. 2.5 mm;
protective sleeve Ø = 10 mm, NL = approx. 25 mm, M10 x 1.0;
with plastic plug connector Ø = approx. 11 mm,
NL = approx. 25 mm,
Measuring range
0...100 % RH (humidity)
-35...+80 °C (temperature)
Zero point offset
± 10 % RH (humidity)
± 5 °C (temperature)
Ambient temperature
–30...+70 °C
clean air and
non-aggressive, non-combustible gases
Bus protocol
Modbus (RTU mode),
address range 0...247 selectable
Signal filtering
4 s / 32 s
Cable gland
2x M 12 x 1.5 (Y-adapter); with strain relief,
exchangeable, max. inner diameter 6 mm
sensor cable
PVC, LiYY, 4 x 0.14 mm²,
KL = approx. 2 m
Mounting (sensor)
cut-out Ø = 11 - 15 mm, IL = approx. 50 mm,
lock nut for fixing is included in the scope of delivery.
Permissible air humidity
< 95 % RH, non-precipitating air
Protection class
III (according to EN 60 730)
Protection type
IP 65 (according to EN 60 529)*
CE conformity
according to EMC Directive 2014/ 30/ EU,
according to EN 61 326
Y-adapter for cable gland M16 x1.5 (on 2x M12 x1.5),
plastic (included in the scope of delivery)