EMEA Region Only

ESPS & ESTS Series

The ESPS and ESTS series are engine-mounted oil pressure and coolant temperature measurement sensors with both resistive sender and fault limit switch outputs.

The resistive sender outputs have the same pressure/temperature versus resistance characteristics as the Murphy ES series senders, allowing use with EG(S)21 series gauges or Swichgages, engine/genset controllers or input/output modules (e.g. the Murphy MeCAN™ interface).

Switch output contacts are normally open (at normal running pressures and temperatures), with the contacts closing to sensor body/case ground when pressure falls below, or temperature rises above, the factory set limits. The switch outputs can be used with external control devices to signal fault conditions, and trigger operator warning and/or engine shutdown protection. For example, the contacts can be used in place of, or in addition to, EG(S)21 Swichgage outputs, to provide two-staged limits for warning and shutdown

Specifications Downloads How To Order

ESPS pressure models

  • Pressure process connection: 1/8”-27 NPTF dryseal
  • Measurement pressure range: 0 – 100 psi (689 kPa, 6.89 Bar)
  • Maximum operating pressure: 100 psi (689 kPa, 6.89 Bar)
  • Switch set point: 15 PSI (103kP7a, 1.03 Bar) falling
  • Switch contacts: closed when pressure falls below set point
  • Contact rating: 5.6W (28VDC, 200mA) max
  • Exterior case material: Zinc plate Chromate
  • Electrical connection: 10-32 UNF-2A studs (x2), brass-tin plate. Brass hex nut.
  • Dimensions: see sales bulletin

ESTS temperature models

  • Temperature bulb connection: 5/8”-18 UNF
  • Measurement temperature range:
    • 38- 121°C /100 – 250°F (model ESTS-250) or
    • 38- 148°C /100 – 300°F (model ESTS-300)
  • Switch set point: 105°C/221°F or 130°C/266°F, ±3°C
  • Switch contacts: closed when temperature rises above set point
  • Contact rating: 5.6W (28VDC, 200mA) max
  • Electrical connection: blade terminals, 6.3 mm / 0.248 in. (sender) and 4.8 mm / 0.0189 in. (switch)
  • Dimensions: see sales bulletin

 WARNING: This product may expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information about California Propsition 65, go to www.P65Warnings.ca.gov or visit our California Proposition 65 page.

Additional product documentation can be found on our product support website or by clicking the Help Center button above.

Part Number Model Description
05.70.7753 ESPS-100 ESPS-100 pressure sender/switch, 1/8” NPT thread, sender range 0-100 PSI, switch set at 15 PSI
10.70.7582 ESTS-250 ESTS-250 temperature sender/switch, 5/8” -18 UNF thread, sender range 38 – 121°C / 100 – 250°F, switch set at 105°C / 221°F
10.70.7583 ESTS-300 ESTS-300 temperature sender/switch, 5/8” -18 UNF thread, sender range 38 – 148°C / 100 – 300°F, switch set at 130°C / 266°F
Note: ESPS and ESTS orders are subject to a minimum order quantity of 100 units.

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