On-wallostat AH-40W LCD
temperature Luftfeuchtigkeit

On-wall hygrostat HYGRASREG® AH-40W LCD

Item no. 1202-1065-0221-000
EAN 4251325615523
Product group: WG01

In Stock

Usually ships in 1 to 3 days
186,85 €
222,35 € incl. VAT + shipping


On-wall hygrostat HYGRASREG® AH-40
Electronic HYGRASREG® AH - 40 hygrostat and humidity detector with one switching output, adjustable switching threshold and display for indicating actual humidity (accuracy class ±2.0 % r.H.) and for setting the target humidity.
The device is used to control and monitor relative humidity e.g. in laboratories, production facilities, climate test chambers, indoor swimming pools, greenhouses, humidifying and dehumidifying equipment, etc. These measuring transducers provide precise detection of humidity. The AH - 40 device uses a digital, long-term stable sensor as a measuring element for humidity. It has been designed for use in dust-free, unpolluted, non-aggressive air.

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 % RH (20…80 % RH ); at + 25 °C, otherwise ± 3 %
potential-free changeover contact (24 V), 1 A ohmic load
Sensor protection
plastic sinter filter, Ø 16 mm, L = 35 mm, exchangeable
(optional metal sinter filter, Ø 16 mm, L = 32 mm)
Setting range
5...95 % r. H.
Ambient temperature
storage –35...+85 °C;
operation – 30...+75 °C, non-precipitating
Process connection
by screws
Protective tube
stainless steel V2A (1.4301), Ø 16 mm, NL = 55 mm
Electrical connection
0.14 - 1.5 mm² via terminal screws
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)
plastic, UV-stabilised,
material polyamide, 30 % glass-globe reinforced,
with quick-locking screws
(slotted/ Phillips head - combination),
colour traffic white (similar to RAL 9016),
housing cover for display is transparent !
Housing dimensions
72 x 64 x 43.3 mm (Tyr 1 with Display)
Cable gland
M 16 x 1.5, including strain relief, exchangeable,
max. inner diameter 10.4 mm
Long-term stability
± 1 % per year
Protection class
III (according to EN 60 730)
Protection type
IP 65 (according to EN 60 529) housing only!
CE conformity,
electromagnetic compatibility according to EN 61326,
according to EMC Directive 2014/ 30/ EU
two-line display with illumination, cutout approx. 36 x15 mm (W x H),
for displaying actual humidit and for setting the target humidity
The 1st line of the display shows the relative humidity.
The 2nd line shows on the left side the information
regarding the switching status of the relay (as a circuit),
as well as the switching value readout in % r.H.
on the right side (adjustable using the set potentiometer).
Circuit, empty = relay in idle state
Circuit, full = relay energised
actual humidity < switching valuecontact 11-12 closed (LED OFF)
actual humidity > switching value
contact 11-13 closed (LED ON)