Mechanical Hygrostat,
Change-Over Contact

The KSMH is designed to control the relative air humidity inside of enclosures. When connected to an enclosure heater, (de-humidifier), it will turn the heater on at the set humidity level in order to raise the dew point. This helps prevent damage and malfunction of electronic components caused by condensation and corrosion.* The KSMH can also be used to control cooling fans, warning lights or other devices.
Contact Kooltronic for pricing Adjustable relative humidity range High switching capacity DIN rail mountable

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TECHNICAL DATA

Model Number:	KSMH
Adjustment range:	35-95% (±3.0%) relative humidity
Switching difference (hysteresis):	Approx. 4% RH @ 50% relative humidity
Permissible air velocity:	50 ft/sec (15m/s)
Maximum switching voltage:	250 VAC (NOTE: 250 V should only be switched in a non-condensing environment!)
Contact type:	Change-over contact
Contact resistance:	<10mΩ
Service life	50,000 cycles
Minimum switching capacity:	100mA @ AC/DC 20 V
Maximum switching capacity:	5A @ AC 230 V (resistive load)
	0.2A @ AC 230 V
	(inductive load at cos φ = 0.8)
	DC 20W
EMI/EMC compliance:	EN 55014-1-2, EN 61000-3-2, EN 61000-3-3
Connection:	3-pole terminal, 3 x AWG 14 max. (2.5 mm²)
Mounting:	Clip for 35mm DIN rail (EN 50022)
Housing:	Plastic, UL94V-0
Weight:	2 oz (60g)
Operating temperature:	32 to 140°F (0 to 60°C)
Storage temperature:	-4°F to 176°F (-20 to 80°C)
Protection type:	IP20
Application examples:	Electrical & Electronic enclosures
	Telecommunication systems
	Display panels
	Ticket dispensers
	Automatic teller machines (ATM's)
	Access & Parking control systems

DIMENSIONS
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Mechanical Hygrostat General Arrangement Drawing

DIMENSIONS
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Dimensions, inches [mm], are for reference only and subject to change.

Specifications are subject to change without notice. Suitability of this product for its intended use and any associated risks must be determined by the end customer/buyer in its final application.

* The critical relative humidity for most components is 65%.
Above 65% RH, condensation can cause malfunction of
electronic equipment. Long-term, this can lead to corrosion
and permanent damage of electronic components and systems.

HOW TO ORDER

Specify model number.

View Data Sheet

Contact Info:
	Kooltronic, Inc. 30 Pennington-Hopewell Road Pennington, NJ 08534 USA
	609-466-3400 800-321-KOOL
	609-466-1114 (fax)
	Contact Us

Mechanical Hygrostat,Change-Over Contact

Mechanical Hygrostat,
Change-Over Contact