5210-248 Commercial electric thermostat 100-450F, 24" Capillary, 3/16" x 11-1/2" Nickel Bulb. Factory Number Z91269. The 5210 Series are SPST direct acting thermostats with a special switch design which make

Commercial electric thermostat 100-450F, 24" Capillary, 3/16" x 11-1/2" Nickel Bulb. Factory Number Z91269. The 5210 Series are SPST direct acting thermostats with a special switch design which makes them very sensitive to small temperature changes. Differential will vary with the control application but will be extremely close when the bulb is immersed in a liquid. When the bulb is located in air, the differential will depend upon the rate of heating and cooling. The slower the rate the closer the differential. U.L. file number E12103. MAXIMUM AMBIENT TEMPERATURE 150°F