Available from Hampshire Controls Corp.
This is a single probe temperature alarm, covering -200°C to +400°C in various factory set ranges, housed in a wall-mounted or free-standing box. The basic unit includes alarm on high and low temperatures, with audible and visual alarm indicators (beeper and LED), settable mute and alarm "chirp" periods, and a UL listed plug-in power supply.
Custom programming & packaging can be provided to fit most temperature monitoring tasks.
Features to make this instrument suitable for applications such as built-in monitoring of freezers, refrigerators and walk-in environmental chambers include temporary muting of the alarm beeper for user-selectable periods up to about 30 minutes (the beeper cannot be disabled completely); optional relay contacts indicating a temperature alarm condition or power failure, for hookup to a remote alarm device or telephone dialer.
In case of power failure, the unit will go to battery mode for up to 100 hours, shutting down all circuitry except a periodic "chirp" of the beeper and short flashes of the red "Alarm" LED to conserve power. Temperature readout is activated by pressing the "Delay" button, to read product temperature without opening the chamber.