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Honeywell Q390 Thermocouple


Thermocouples generate a thermoelectric current that senses a pilot flame on gas-fired heating systems. The pilot flame heats the tip of the thermocouple, producing a temperature differential between it and the base. This temperature difference generates a small amount of DC power, measured in millivolts.

• Push-in clip, split nut, and adapter assembly for easy pilot burner installation.
• Spade or quick-connect terminals available for millivolt gas control connections.
• Male nut connector for Pilotstat™ safety control power units.
• Available in a variety of lead lengths.

Select a link under the "item" tab below to order.

ResistanceCat #(mm)Connection Type(inch)IncludesProd No
0.02 ohmQ390A1046610 mm11/32 32 Male Connector Nut24 in.Adapter and Push In Clip*
0.02 ohmQ390A1053762 mm11/32 32 Male Connector Nut30 in.Adapter and Push In Clip*
0.02 ohmQ390A1061914 mm11/32 32 Male Connector Nut36 in.Adapter and Push In Clip*
0.02 ohmQ390A1095457 mm11/32 32 Male Connector Nut18 in.Adapter and Push In Clip*
0.03 ohmQ390A11031219 mm11/32 32 Male Connector Nut48 in.Adapter and Push In Clip*
Open Circuit Output 26 mV to 32 mV
Voltage 30 mV
Temperature Ratings Cold Junction

780 F (416 C)

Temperature Ratings Hot Junction 1400 F (760 C)

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