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  • Indicates media temperature using a temperature-actuated liquid in the sensing element and a highly accurate, high quality pressure gauge
  • As the media temperature increases, the capillary fill fluid vaporizes, increasing pressure in the Bourdon tube to activate the movement and pointer for proper indication
  • Brass, stainless steel, or phenolic case
  • Dry or liquid filled
  • Bottom, back or lower back connected
  • The dial scale graduations are non-linear, therefore the highest degree of accuracy and readability is found in the upper half of the scale
300 Series Vapor Actuated Remote Dial Indicating Thermometers
300 Series Vapor Actuated Remote Dial Indicating Thermometers - 2
Unit of Measure
1 2 

Part Number

Description

Temperature [Min]

Temperature [Max]

Capillary Length

Bulb Dimensions

25-310-0-1-7-2-15-3-2 N/A 2-1/2", 30 to 240 ºF/ºC Armored Copper Capillary, 15 ft, 1/2" National Pipe Thread (NPT) Union Copper Bulb, 4-1/2" x 3/8" Vapor Thermometer with Dry and Chrome Front Flange N/A 30 ºF N/A 240 ºF N/A 15 ft N/A 4-1/2 x 3/8 in
25-310-0-1-7-2-6-3-1 N/A 2-1/2", 30 to 240 ºF/ºC Armored Copper Capillary, 6 ft, 1/2" National Pipe Thread (NPT) Union Copper Bulb, 2-5/8 x 3/8" Vapor Thermometer with Dry and Chrome Front Flange N/A 30 ºF N/A 240 ºF N/A 6 ft N/A 2-5/8 x 3/8 in
25-310-1-1-10-2-15-3-2 N/A 2-1/2", 100 to 350 ºF/ºC Armored Copper Capillary, 15 ft, 1/2" National Pipe Thread (NPT) Union Copper Bulb, 4-1/2" x 3/8" Vapor Thermometer with Glycerin Fill and Chrome Front Flange N/A 100 ºF N/A 350 ºF N/A 15 ft N/A 4-1/2 x 3/8 in
25-310-1-1-7-2-35-3-2 N/A 2-1/2", 30 to 240 ºF/ºC Armored Copper Capillary, 35 ft, 1/2" National Pipe Thread (NPT) Union Copper Bulb, 4-1/2" x 3/8" Vapor Thermometer with Glycerin Fill and Chrome Front Flange N/A 30 ºF N/A 240 ºF N/A 35 ft N/A 4-1/2 x 3/8 in
25-310-1-1-7-2-40-3-2 N/A 2-1/2", 30 to 240 ºF/ºC Armored Copper Capillary, 40 ft, 1/2" National Pipe Thread (NPT) Union Copper Bulb, 4-1/2" x 3/8" Vapor Thermometer with Glycerin Fill and Chrome Front Flange N/A 30 ºF N/A 240 ºF N/A 40 ft N/A 4-1/2 x 3/8 in
25-310-1-1-8-2-40-3-2 N/A 2-1/2", 30 to 300 ºF/ºC Armored Copper Capillary, 40 ft, 1/2" National Pipe Thread (NPT) Union Copper Bulb, 4-1/2" x 3/8" Vapor Thermometer with Glycerin Fill and Chrome Front Flange N/A 30 ºF N/A 300 ºF N/A 40 ft N/A 4-1/2 x 3/8 in
25-310-1-1-9-2-40-3-2 N/A 2-1/2", 50 to 350 ºF/ºC Armored Copper Capillary, 40 ft, 1/2" National Pipe Thread (NPT) Union Copper Bulb, 4-1/2" x 3/8" Vapor Thermometer with Glycerin Fill and Chrome Front Flange N/A 50 ºF N/A 350 ºF N/A 40 ft N/A 4-1/2 x 3/8 in
25-310-1-1-9-2-50-3-2 N/A 2-1/2", 50 to 350 ºF/ºC Armored Copper Capillary, 50 ft, 1/2" National Pipe Thread (NPT) Union Copper Bulb, 4-1/2" x 3/8" Vapor Thermometer with Glycerin Fill and Chrome Front Flange N/A 50 ºF N/A 350 ºF N/A 50 ft N/A 4-1/2 x 3/8 in
25-310-1-2-3-2-25-3-2 N/A 2-1/2", 0 to 250 ºF/ºC Armored Copper Capillary, 25 ft, 1/2" National Pipe Thread (NPT) Union Copper Bulb, 4-1/2" x 3/8" Vapor Thermometer with Glycerin Fill and Brass Front Flange N/A 0 ºF N/A 250 ºF N/A 25 ft N/A 4-1/2 x 3/8 in
25-310-1-4-10-2-15-3-1 N/A 2-1/2", 100 to 350 ºF/ºC Armored Copper Capillary, 15 ft, 1/2" National Pipe Thread (NPT) Union Copper Bulb, 2-5/8 x 3/8" Vapor Thermometer with Glycerin Fill, Chrome Bezel, and U-Clamp N/A 100 ºF N/A 350 ºF N/A 15 ft N/A 2-5/8 x 3/8 in
25-310-1-4-10-2-20-3-2 N/A 2-1/2", 100 to 350 ºF/ºC Armored Copper Capillary, 20 ft, 1/2" National Pipe Thread (NPT) Union Copper Bulb, 4-1/2" x 3/8" Vapor Thermometer with Glycerin Fill, Chrome Bezel, and U-Clamp N/A 100 ºF N/A 350 ºF N/A 20 ft N/A 4-1/2 x 3/8 in
25-310-1-4-10-2-50-3-2 N/A 2-1/2", 100 to 350 ºF/ºC Armored Copper Capillary, 50 ft, 1/2" National Pipe Thread (NPT) Union Copper Bulb, 4-1/2" x 3/8" Vapor Thermometer with Glycerin Fill, Chrome Bezel, and U-Clamp N/A 100 ºF N/A 350 ºF N/A 50 ft N/A 4-1/2 x 3/8 in
25-310-1-4-8-2-15-3-1 N/A 2-1/2", 30 to 300 ºF/ºC Armored Copper Capillary, 15 ft, 1/2" National Pipe Thread (NPT) Union Copper Bulb, 2-5/8 x 3/8" Vapor Thermometer with Glycerin Fill, Chrome Bezel, and U-Clamp N/A 30 ºF N/A 300 ºF N/A 15 ft N/A 2-5/8 x 3/8 in
25-310-1-4-8-2-20-3-2 N/A 2-1/2", 30 to 300 ºF/ºC Armored Copper Capillary, 20 ft, 1/2" National Pipe Thread (NPT) Union Copper Bulb, 4-1/2" x 3/8" Vapor Thermometer with Glycerin Fill, Chrome Bezel, and U-Clamp N/A 30 ºF N/A 300 ºF N/A 20 ft N/A 4-1/2 x 3/8 in
25-310-1-4-8-2-30-3-2 N/A 2-1/2", 30 to 300 ºF/ºC Armored Copper Capillary, 30 ft, 1/2" National Pipe Thread (NPT) Union Copper Bulb, 4-1/2" x 3/8" Vapor Thermometer with Glycerin Fill, Chrome Bezel, and U-Clamp N/A 30 ºF N/A 300 ºF N/A 30 ft N/A 4-1/2 x 3/8 in
25-310-1-4-8-2-40-3-2 N/A 2-1/2", 30 to 300 ºF/ºC Armored Copper Capillary, 40 ft, 1/2" National Pipe Thread (NPT) Union Copper Bulb, 4-1/2" x 3/8" Vapor Thermometer with Glycerin Fill, Chrome Bezel, and U-Clamp N/A 30 ºF N/A 300 ºF N/A 40 ft N/A 4-1/2 x 3/8 in
25-310-2-1-10-2-20-3-2 N/A 2-1/2", 100 to 350 ºF/ºC Armored Copper Capillary, 20 ft, 1/2" National Pipe Thread (NPT) Union Copper Bulb, 4-1/2" x 3/8" Vapor Thermometer with -40 Degree Service Fill and Chrome Front Flange N/A 100 ºF N/A 350 ºF N/A 20 ft N/A 4-1/2 x 3/8 in
25-310-2-1-10-2-40-3-2 N/A 2-1/2", 100 to 350 ºF/ºC Armored Copper Capillary, 40 ft, 1/2" National Pipe Thread (NPT) Union Copper Bulb, 4-1/2" x 3/8" Vapor Thermometer with -40 Degree Service Fill and Chrome Front Flange N/A 100 ºF N/A 350 ºF N/A 40 ft N/A 4-1/2 x 3/8 in
25-310-2-1-10-2-40-3-5 N/A 2-1/2", 100 to 350 ºF/ºC Armored Copper Capillary, 40 ft, 1/2" National Pipe Thread (NPT) Union Copper Bulb, 6" x 3/8" Vapor Thermometer with -40 Degree Service Fill and Chrome Front Flange N/A 100 ºF N/A 350 ºF N/A 40 ft N/A 6 x 3/8 in
25-310-2-1-7-2-10-3-1 N/A 2-1/2", 30 to 240 ºF/ºC Armored Copper Capillary, 10 ft, 1/2" National Pipe Thread (NPT) Union Copper Bulb, 2-5/8" x 3/8" Vapor Thermometer with -40 Degree Service Fill and Chrome Front Flange N/A 30 ºF N/A 240 ºF N/A 10 ft N/A 2-5/8 x 3/8 in
25-310-2-1-7-2-30-3-4 N/A 2-1/2", 30 to 240 ºF/ºC Armored Copper Capillary, 30 ft, 1/2" National Pipe Thread (NPT) Union Copper Bulb, 3-1/2" x 3/8" Vapor Thermometer with -40 Degree Service Fill and Chrome Front Flange N/A 30 ºF N/A 240 ºF N/A 30 ft N/A 3-1/2 x 3/8 in
25-310-2-1-7-2-40-3-2 N/A 2-1/2", 30 to 240 ºF/ºC Armored Copper Capillary, 40 ft, 1/2" National Pipe Thread (NPT) Union Copper Bulb, 4-1/2" x 3/8" Vapor Thermometer with -40 Degree Service Fill and Chrome Front Flange N/A 30 ºF N/A 240 ºF N/A 40 ft N/A 4-1/2 x 3/8 in
25-310-2-1-9-2-15-3-2 N/A 2-1/2", 50 to 350 ºF/ºC Armored Copper Capillary, 15 ft, 1/2" National Pipe Thread (NPT) Union Copper Bulb, 4-1/2" x 3/8" Vapor Thermometer with -40 Degree Service Fill and Chrome Front Flange N/A 50 ºF N/A 350 ºF N/A 15 ft N/A 4-1/2 x 3/8 in
25-310-2-4-10-2-15-3-2 N/A 2-1/2", 100 to 350 ºF/ºC Armored Copper Capillary, 15 ft, 1/2" National Pipe Thread (NPT) Union Copper Bulb, 4-1/2" x 3/8" Vapor Thermometer with -40 Degree Service Fill, Chrome Bezel, and U-Clamp N/A 100 ºF N/A 350 ºF N/A 15 ft N/A 4-1/2 x 3/8 in
25-310-2-4-10-2-15-3-5 N/A 2-1/2", 100 to 350 ºF/ºC Armored Copper Capillary, 15 ft, 1/2" National Pipe Thread (NPT) Union Copper Bulb, 6" x 3/8" Vapor Thermometer with -40 Degree Service Fill, Chrome Bezel, and U-Clamp N/A 100 ºF N/A 350 ºF N/A 15 ft N/A 6 x 3/8 in
Unit of Measure
1 2