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Featured Products

Vanguard Gas Detector


The Vanguard Toxic and Combustible WirelessHART® Gas Detector was born to be wireless. With a  5-year battery and 1-button calibration — the Vanguard is a gas detector built for the wireless world!

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12 Series ST/ST Switch


Vibration-resistant, 316 stainless steel Pressure, Differential Pressure and Temperature Switches.

120 Series

Pressure & Temperature


Rugged, Explosion-proof Pressure, Vacuum, Differential Pressure and Temperature Switches.

TX200 Series

Pressure Transmitter


TX200H Series HART® Smart Explosion Proof Pressure Transmitter and


One Series

Safety Transmitter


One Series Electronic Pressure, Differential Pressure and Temperature Products

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 One Series



One Series X Explosion Proof Transmitter-Switch

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Our Product Selector is available in Chinese and Russian.

Tel:  (617) 926-1000

Fax: (617) 926-4354

Do you have a  customer service or technical question?  Please email us and we will get back to you.

180 Dexter Avenue, Watertown, MA  02472-4200