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Ignition Electrode 12mm Insulator by R.K. Instruments & Controls, with dimension callouts (100mm electrode rod/wire length, 125mm insulator/ceramic length, 12mm insulator diameter) and SAE / D4 / M4 threaded terminal connector
Ignition Electrode 12mm Insulator by R.K. Instruments & Controls, with dimension callouts (100mm electrode rod/wire length, 125mm insulator/ceramic length, 12mm insulator diameter) and SAE / D4 / M4 threaded terminal connector — zoomed view
Ignition Electrodes Standard Stock Size

Ignition Electrode 12mm Insulator — 125mm x 100mm, Standard Stock

Product Code: Standard Stock (12 x 125 x 100 mm) · SAE / D4 / M4 Connection
Product TypeIgnition Electrode (Ignitor / Flame Rod / Sensor Probe)
Insulator Diameter (D2)12 mm
Insulator Length (L2)125 mm
Electrode Length (L1)100 mm (rod/wire)
Electrode ConfigurationStraight tip
Connection TypeSAE / D4 / M4 Connection (other terminations on request)
Terminal ThreadSAE = 8-32 NC · M4 = M4 x 0.7 (D4 connection thread size not listed — confirm on request)
Insulator MaterialLow-loss, alkali-free Steatite Ceramic (glazed or unglazed, natural satin-smooth finish) or 92–95% Aluminium Oxide
Electrode & Wiring MaterialKanthal A1 (FeCrAl resistance wire)
ManufacturerR.K. Instruments & Controls

R.K. Instruments & Controls supplies this Straight Ignition Electrode as a standard fixed-size Ignitor, Flame Rod and Sensor Probe for burner and boiler ignition and flame-proving applications. It has a low-loss, alkali-free steatite ceramic insulator 125 mm long and 12 mm in diameter, with a 100 mm electrode rod/wire length and an SAE / D4 / M4 terminal connection (SAE = 8-32 NC, M4 = M4 x 0.7), built using our standard Kanthal A1 (FeCrAl) resistance wire. A ready-to-fit standard size for applications that do not need a fully custom electrode.

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