ECM NH3 5250, Instruction Manual, Page: 27 / 62

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Pressure Sensor
Note: Must attach to engine via ECM-supplied pressure sensor tubing only!
Do not directly attach to the exhaust or pressure sensor damage will result.
Diaphragm Material: Stainless steel
Maximum Pressure: 200 Psia, 1379 kPa (absolute)
Operating Temperature Range: -40 to 105 °C
Thread on Pressure Sensor: ¼” NPT
Fitting on Pressure Sensor: Swagelok SS-400-7-4 to mate with ¼” tube (USA) or
Swagelok SS-6MO-7-4 to mate with 6 mm tube (Metric)
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Pressure Sensor Tubing
Note: Stainless steel end of tubing towards engine. Teflon end towards pressure sensor.
Mating Thread with Engine: ¼” NPT (USA) or ¼” ISO tapered (Metric)
Tubing Assembled Length: 19” (USA) or 483 mm (Metric)
Tubing Diameter: ¼” (USA) or 6mm (Metric)
Nut, Front Ferrule, Back Ferrule at Pressure Sensor end of Tubing:
Swagelok SS-402-1, SS-403-1, SS-404-1 (USA) or
Swagelok SS-6M3-1, SS-6M4-1, SS-6M2-1 (Metric)
Union between Stainless Steel and Teflon Tubing: Swagelok SS-400-6 (USA) or
Swagelok SS-6MO-6 (Metric)
Fitting on Engine End of Tubing: Swagelok SS-400-1-4, ¼” tube to ¼”
NPT (USA) or
Swagelok SS-6MO-1-4RT, 6 mm tube to ¼” ISO tapered (Metric)