Thermocouples

Honeywell Thermocouples are sold in four sizes. These sizes include 24", 30", 36", & 48". Honeywell Thermocouples are the industry standard.

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  • 24" Thermocouple View Specs
    • SKU: Q390A1046
    • Brand: Honeywell

    $4.15 / each

    $39.50 / box
    10 x $3.95

    In Stock! (260 Available) Ships in 24-48 Hrs
  • 18" Thermocouple View Specs
    • SKU: Q390A1095
    • Brand: Honeywell

    $3.95 / each

    $37.50 / box
    10 x $3.75

    In Stock! (76 Available) Ships in 24-48 Hrs
  • 30" Thermocouple View Specs
    • SKU: Q390A1053
    • Brand: Honeywell

    $4.45 / each

    $42.50 / box
    10 x $4.25

    In Stock! (163 Available) Ships in 24-48 Hrs
  • 36" Thermocouple View Specs
    • SKU: Q390A1061
    • Brand: Honeywell

    $4.65 / each

    $44.50 / box
    10 x $4.45

    In Stock! (804 Available) Ships in 24-48 Hrs
  • 48" Thermocouple View Specs
    • SKU: Q390A1103
    • Brand: Honeywell

    $5.25 / each

    $50.50 / box
    10 x $5.05

    In Stock! (76 Available) Ships in 24-48 Hrs
  • 18" Thermocouple with maximum copel View Specs
    • SKU: Q340A1066
    • Brand: Honeywell

    $6.55 / each

    $63.50 / box
    10 x $6.35

    In Stock! (98 Available) Ships in 24-48 Hrs
  • 24" Thermocouple with maximum copel View Specs
    • SKU: Q340A1074
    • Brand: Honeywell

    $6.85 / each

    $66.50 / box
    10 x $6.65

    In Stock! (580 Available) Ships in 24-48 Hrs
  • 30" Thermocouple with maximum copel View Specs
    • SKU: Q340A1082
    • Brand: Honeywell

    $7.25 / each

    $69.50 / box
    10 x $6.95

    In Stock! (355 Available) Ships in 24-48 Hrs
  • 36" Thermocouple with maximum copel View Specs
    • SKU: Q340A1090
    • Brand: Honeywell

    $7.45 / each

    $28.60 / box
    4 x $7.15

    In Stock! (295 Available) Ships in 24-48 Hrs
  • 48" Thermocouple with maximum copel View Specs
    • SKU: Q340A1108
    • Brand: Honeywell

    $8.25 / each

    $79.50 / box
    10 x $7.95

    In Stock! (42 Available) Ships in 24-48 Hrs
  • 36" Junction Block Thermocouple w/ Energy Cut-Off View Specs
    • SKU: H06F-36
    • Brand: White Rodgers

    $12.65 / each

    $121.50 / box
    10 x $12.15

    In Stock! (14 Available) Ships in 24-48 Hrs
  • 18" Universal Replacement Thermocouple View Specs
    • SKU: H06E-18
    • Brand: White Rodgers

    $4.19 / each

    $39.90 / box
    10 x $3.99

    In Stock! (149 Available) Ships in 24-48 Hrs
  • 48" Vertical Pilot Couple View Specs
    • SKU: PCA50L14L48
    • Brand: White Rodgers

    $108.95 / each

    Non-Stock Item Allow 7-10 Days to Ship Out
  • 24" Universal Replacement Thermocouple View Specs
    • SKU: H06E-24
    • Brand: White Rodgers

    $4.35 / each

    $41.50 / box
    10 x $4.15

    In Stock! (429 Available) Ships in 24-48 Hrs
  • 48" Horizontal Pilot Couple View Specs
    • SKU: PCB50L14L48
    • Brand: White Rodgers

    $92.85 / each

    Non-Stock Item Allow 7-10 Days to Ship Out
  • 35" Thermopile Generator (750 mV) View Specs
    • SKU: Q313A1022
    • Brand: Honeywell

    $40.95 / each

    In Stock! (4 Available) Ships in 24-48 Hrs
  • 30" Universal Replacement Thermocouple View Specs
    • SKU: H06E-30
    • Brand: White Rodgers

    $4.55 / each

    $43.50 / box
    10 x $4.35

    In Stock! (130 Available) Ships in 24-48 Hrs
  • 35" Thermopile Generator w/ PG9 Adapter (750 mV) View Specs
    • SKU: Q313A1170
    • Brand: Honeywell

    $40.95 / each

    $197.75 / box
    5 x $39.55

    In Stock! (60 Available) Ships in 24-48 Hrs
  • 36" Universal Replacement Thermocouple View Specs
    • SKU: H06E-36
    • Brand: White Rodgers

    $4.75 / each

    $45.50 / box
    10 x $4.55

    In Stock! (370 Available) Ships in 24-48 Hrs
  • 35" Thermopile Generator w/ Push-in clip & 1/2" Thermopile Attaching Nut (750 mV) View Specs

    $37.35 / each

    $179.75 / box
    5 x $35.95

    In Stock! (31 Available) Ships in 24-48 Hrs

More About Thermocouples

A thermocouple senses temperature at a pilot burner. The thermocouple determines if the main flame is hot and safe enough to ignite natural gas or propane to the burner. A thermocouple consists of two different metals joined together at one end. This unique bond of metals produces a small voltage at a given temperature.

Honeywell, the leading manufacturer in thermocouples, produces a standard thermocouple as well as a thermocouple with maximum copel. Copel is an alloy of copper and nickel. A thermocouple with a higher amount of copel will have a longer life span than a standard thermocouple. Honeywell thermocouples are available in lengths of 18", 24", 30", 36", and 48".

Robertshaw is known for its Uni-Couple thermocouple Series. The unique design of the Uni-Couple allows for installation to almost all pilot burners. The design includes a stainless steel tip which provides longer life, copper tubing for corrosion protection and low electrical resistance, and an extended cold junction for greater voltage output. Uni-Couples are available in lengths of 18", 24", 30", 36", 48", 60" and 72" making them an extremely versatile option.

The Snap-Fit Thermocouple is an additional series of thermocouples by Robertshaw. Thermocouples in this series don't need complicated adapters to adapt to most pilot burners, making installation simple. Snap-Fit Thermocouples are available in lengths of 12", 18", 24", 30", 36", 48", 60" and 72".

A thermopile generator consists of multiple thermocouples linked in a series to increase millivoltage output. Sufficient power is generated and can operate an automatic millivolt gas control system, independent from any exterior power source. Thermopile generators are available in a variety of lead lengths and connection types, making them cost effective and resourceful.