To provide a wider range of options for sensing humidity and temperature inside ducts and economizer rooftop systems, the company has expanded the ohm reference resistance in two of its HE-6320 humidity/temperature sensors. The HE-6320-2 now includes a new nickel temperature sensor with a reference resistance of 1K ohms. The HE-6320-5 offers a new thermistor temperature sensor with a negative temperature coefficient and a reference resistance of 10K ohms. The units can be mounted quickly to the duct surface, says the manufacturer.
Johnson Controls, Inc., P.O. Box 423, Milwaukee, WI 53201; 414-274-5622; 414-347-0221 (fax); www.johnsoncontrols.com (website).