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Description
Duct hygrostat
HYGRASREG® KH-40
Electronic HYGRASREG® KH - 40 hygrostat and humidity measuring transducer with one switching output, adjustable switching threshold and display for indicating actual humidity (accuracy class ±2.0% RH) and for setting the target humidity.
The sensor device serves to control and monitor the relative humidity e.g. in humidifying and dehumidifying equipment, ventilation and air conditioning ducts, laboratories, production facilities, climate test chambers, indoor swimming pools, greenhouses, etc. It provides precise detection of humidity. The KH-40 has a digital, long-term stable sensor as a measuring element for humidity. It is used in dust-free, unpolluted, non-aggressive air.
Technical details
Voltage supply
24 V AC (± 20 %) and
15…36 V DC
15…36 V DC
Power consumption
< 1.1 VA/ 24 V DC ; < 2.2 VA/ 24 V AC
Output
potential-free changeover contact (24 V), 1 A ohmic load
Sensor protection
plastic sinter filter, Ø 0.63 in, L = 1.38 in, exchangeable
(optional metal sinter filter, Ø 0.63 in, L = 1.26 in)
(optional metal sinter filter, Ø 0.63 in, L = 1.26 in)
Accuracy
typical ± 2 % RH (20…80 % RH ); at + 77 °F, otherwise ± 3 %
Setting range
5...95 % RH
Ambient temperature
storage –31...+185 °F;
operation – 22...+167 °F, non-precipitating
operation – 22...+167 °F, non-precipitating
Process connection
by mounting flange, plastic
(included in the scope of delivery)
(included in the scope of delivery)
Protective tube
PLEUROFORM, material polyamide (PA6), with torsion protection,
Ø 0.79 in, NL = 9.3 in (optionally 3.9 in), vmax = 98.4 ft/s (air)
(option on request in stainless steel V2A (1.4301), Ø 0.63 in)
Ø 0.79 in, NL = 9.3 in (optionally 3.9 in), vmax = 98.4 ft/s (air)
(option on request in stainless steel V2A (1.4301), Ø 0.63 in)
Electrical connection
AWG 16 - 26 via terminal screws
Cable connection
cable gland, plastic (M 16 x 1.5; with strain relief, exchangeable, max. inner diameter 0.4 in) or
M12 connector according to DIN EN 61076-2-101 (optional on request)
M12 connector according to DIN EN 61076-2-101 (optional on request)
Housing
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 !
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
2.8 x 2.5 x 1.7 in (Tyr 1 with Display)
Cable gland
M 16 x 1.5, including strain relief, exchangeable,
max. inner diameter 0.4 in
max. inner diameter 0.4 in
Long-term stability
± 1 % per year
Protection class
III (according to EN 60 730)
Protection type
IP 65 (according to EN 60 529) enclosure only!
Standards
CE conformity,
electromagnetic compatibility according to EN 61326,
according to EMC Directive 2014/ 30/ EU
electromagnetic compatibility according to EN 61326,
according to EMC Directive 2014/ 30/ EU
Display
two-line display with illumination, cutout approx. 1.4 x 0.6 in (W x H),
for displaying actual humidit and for setting the target humidity
for displaying actual humidit and for setting the target humidity
Displaying
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 % RH
on the right side (adjustable using the set potentiometer).
Circuit, empty = relay in idle state
Circuit, full = relay energised
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 % RH
on the right side (adjustable using the set potentiometer).
Circuit, empty = relay in idle state
Circuit, full = relay energised
Function
The relay output is triggered (contact 13 -11 closed) if the humidity
switchpoint is not reached and opens (contact 12 -11 closed)
in the event of a fault (power failure, condensation) LED short pulses =
relay active switchpoint not reached LED long pulses =
relay inactive switchpoint exceeded
switchpoint is not reached and opens (contact 12 -11 closed)
in the event of a fault (power failure, condensation) LED short pulses =
relay active switchpoint not reached LED long pulses =
relay inactive switchpoint exceeded