The Thermtrol M Series is a premium thermostat for premium applications
requiring a long life, regulating thermostat. The long life capability of the M Series derives from its semi-permanent snap spring with flat, non-distorting twin bi-metal construction. A narrow differential maintains uniform temperature stability and a low thermal-resistant plastic housing permits the M Series to react quickly to temperature variations. All M Series manufacturer of thermostats are built on a per order basis to your temperature specifications and are not available from stock.