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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
Items 300 Series Vapor Actuated Remote Dial Indicating Thermometers
25-310-0-1-7-2-15-3-2
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
300 Series Vapor Actuated Remote Dial Indicating Thermometers
25-310-0-1-7-2-6-3-1
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
300 Series Vapor Actuated Remote Dial Indicating Thermometers
25-310-1-1-10-2-15-3-2
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
300 Series Vapor Actuated Remote Dial Indicating Thermometers
25-310-1-1-7-2-35-3-2
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
300 Series Vapor Actuated Remote Dial Indicating Thermometers
25-310-1-1-7-2-40-3-2
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
Description N/A
  • 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
Type N/A Remote Dial Indicating Thermometer
Series N/A 300
Dial Size N/A 2-1/2 in
Case Type N/A Brass Case, Back Connection
Temperature [Min] N/A 30 ºF N/A 30 ºF N/A 100 ºF N/A 30 ºF N/A 30 ºF
Temperature [Max] N/A 240 ºF N/A 240 ºF N/A 350 ºF N/A 240 ºF N/A 240 ºF
Full Scale Accuracy (±) N/A 2.0 %
Accuracy Grade N/A B
Accuracy Standard N/A American Society of Mechanical Engineers (ASME) B40.3
Connection Size N/A 1/2 in
Lens N/A Acrylic
Connection Type N/A National Pipe Thread (NPT)
Pointer N/A Aluminum, Black Finish
Dial N/A Aluminum, white background, dual scale, black Celsius scale and black Fahrenheit scale
Gauge Fill Fluids N/A Dry Gauge N/A Dry Gauge N/A Glycerin N/A Glycerin N/A Glycerin
Mounting Options N/A Chrome Front Flange
Capillary Types/Materials N/A Armored Copper
Bulb Styles/Materials N/A 1/2 in. NPT Union Copper
Warranty N/A 1 yr
Capillary Length N/A 15 ft N/A 6 ft N/A 15 ft N/A 35 ft N/A 40 ft
Bulb Dimensions N/A 4-1/2 x 3/8 in N/A 2-5/8 x 3/8 in N/A 4-1/2 x 3/8 in N/A 4-1/2 x 3/8 in N/A 4-1/2 x 3/8 in
Options and Accessories N/A
  • Brass, Stainless Steel, or Phenolic case
  • Dry or liquid filled
  • Bottom, back or lower back connected
  • Mounting options: front or rear flange, bezel, and u-clamp
  • Capillary material: Copper or Stainless Steel
Application N/A
  • Power transformers
  • Paper mills
  • Refineries
  • Petrochemical
  • Oil and gas
  • Chemical
  • HVAC/R
  • Food processing
  • Pharmaceutical
Prop 65 Warnings N/A
WARNING: This product can expose you to chemicals including Lead and Nickel, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov
Limitations Which Apply Are N/A These units must be operated within the catalogued environmental and application parameters. Determination of failure will be made by NOSHOK, Inc.'s equipment and personnel or a certified test facility specializing in this type of evaluation.

In keeping with and for purposes of product and/or manufacturing process improvements, NOSHOK, Inc. reserves the right to make design changes without prior notice.
Thermowells N/A Thermowells allow a temperature instrument to be removed and replaced without shutting down and draining the process, and reduce the possibility of damage to the temperature instrument.
Note N/A Only available on 300 Series

Thermowells are recommended for pressure, corrosive fluids and high velocity applications.
N/A Only available on 300 Series

Not available for gauge sizes ≥4" or ≥16' capillary

Thermowells are recommended for pressure, corrosive fluids and high velocity applications.
N/A Only available on 300 Series

Thermowells are recommended for pressure, corrosive fluids and high velocity applications.
N/A Only available on 300 Series

Thermowells are recommended for pressure, corrosive fluids and high velocity applications.
N/A Only available on 300 Series

Thermowells are recommended for pressure, corrosive fluids and high velocity applications.