Model SM series are potentiometer setting meter relays with dual Hi & Lo settings. The setters are used multi-turns resistive potentiometers as preset buffers which settings are able to be read directly in display for switch selection. The input functions of the units are of wide varieties & ranges, including many parameters of industry process and power system as DCV, ACV, DCA, ACA, DC rate, and temperature.

The SMT Temperature Meter Relay provides a four digit display with up to 9999 counts with find resolution & the displays are of high rate-super brightness LED, 0.56″ size.
Dual control outputs compliant Hi & Lo setting of SPDT relay contacts of an on-off control type. The outputs also comply with delaying function adjusted 0-30 second standards & longer requirements for 0-60 or 0-120 seconds with specified request. Dead band is also an option available as selective or alternative to time delayer.
This model features a specially designed open-door type in the meter; it keeps convenience in presetting & protects settings to avoid undesired miss changes in field application.