The Series 677 differential pressure transmitter is designed to measure pressures as low as 0.1-inch WC with ±0.4% accuracy. It is available in a variety of ranges from 0- to 0.1-inch WC, to 0- to 100-inch WC, the company states. The transmitter has an operating temperature from 0 to 175 degrees F (-18 to 79 degrees C). The transmitter features 10-PSID overpressure, reverse-polarity protection, EMI/RFI protection, and a 4-20-mA output. According to the manufacturer, the series is ideal for building energy management systems, environmental pollution control, fume hood control, and HVAC and VAV applications.

Dwyer Instruments Inc., P.O. Box 373, Michigan City, IN 46361; 219-879-8000; 219-872-9057 (fax); (e-mail); (website).

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