20K Ohm NTC Temperature Sensor, Duct Averaging Application, 24 Foot Insertion Length, -40/250 Degree Operating Temperature Range, 20k Ohm NTC @ 77 Degrees, Used with Excel 10,50,80,100,500 Series

1000 Ohm Thermistor Immersion Sensor, 35-55 Degree, 1/2 Inch NPT , 6 Inch Insertion Length with 3 Inch Insualtion Depth, 1000 Ohm @ 77 Degree NTC

1000 Ohm Thermistor Immersion Sensor, 35-55 Degree, 1/2 Inch NPT , 6 Inch Insertion Length with 3 Inch Insualtion Depth, 1000 Ohm @ 77 Degree NTC

1000 Ohm Thermistor Immersion Sensor, 35-55 Degree, 1/2 Inch NPT , 6 Inch Insertion Length with 5 Inch Insualtion Depth, 1000 Ohm @ 77 Degree NTC

Ultraviolet Flame Detector, Minipeeper Style, Stainless Steel Housing, 72 Inch Lead Length, Integral Nut for 1/2 Inch Sighting Pipe Mount, Used with Flame Safeguard Safety Controls on Coal,Gas and Oil Burners, 0/215 Degree Ambient Temperature, Includes Mounting Bracket