Kahn Instruments, Inc. - Wethersfield, CT
Manufacturer
Manufacturers of a full line of precision hygrometers. Sensor types include aluminum oxide, ceramic & chilled mirror. All hygrometers feature first response, corrosion resistance & accuracy traceable to NIST.
www.kahn.com/index.html

Sensaphone - Aston, PA
Manufacturer
Manufacturers Of Sensaphone® Remote Monitoring/Alarm Reporting Systems & SCADA 3000 RTU/Software. Reports Information Via Phone Line Or Radio In Voice Or Data

Philadelphia Instruments & Controls Inc. - Philadelphia, PA
Manufacturer, Custom Manufacturer
Manufacturer of thermometers.

Glacier Valley Enterprises - Baraboo, WI
Distributor, Manufacturer
Manufacturer of frost alarms.

NovaLynx Corporation - Auburn, CA
Distributor, Manufacturer, Custom Manufacturer
Custom manufacturer of frost alarms. Frost alarms are available in various models with specifications including 10 degrees F to 110 degrees F set point, 75 dB alarm buzzer at 2 ft., 6 1/4 in. x 3 3/4 in. x 2 in. sizes & 1 lb. weight. Frost alarms are available with buzzer & light, copper cable, wire, monitor & sensor probe. American made.