Overfill Dummy Probes

The DP300 Series is an accurate and reliable electronic dummy probe for 2-wire optic and thermistor overfill protection systems.

Dummy probes are used when a tanker has fewer compartments than the number of channels on the gantry overfill monitor. The DP30x provides a simulation signal to unused channels in order to obtain a permissive signal from the gantry monitor.

The DP300 Series can simulate up to 7 compartments and is available in both 5 channel and 7 channel models.

Note: Australia uses DP305 only.


Features & Benefits
  • Designed in compliance with EN13922.
  • Available with five channels (DP305) or seven channels (DP307).
  • Power supply is intrinsically safe from industry standard 2 wire gantry monitor via gantry plug when truck is connected.
  • IECEx, UKEX and ATEX certification for installation in zone 1 hazardous areas.
  • Can be mounted in truck plug or junction box.
  • IP67 rated.
  • Compatible with 2 wire optic and thermistor overfill systems.
  • Can be used as replacement in other industry standard overfill systems.
Technical Information


  • IECEx Certificate: IECEx ITA 13.0024X
    • Marking: Ex ia IIA T3 IP67


  • ATEX Certificate: ERO21ATEX0018X
    • Marking: CE 2813 II 2 G Ex ia IIA T3 Gb


  • UKEX Certificate: EMA21IKEX0075X
    • Marking: UKCA 0518 II 2 G Ex ia [ia Ga] IIA T3 Gb



Temperature: Ta= -25°C to 60°C.

Parameters: Ui = 30V, Pi = 9W, Ii = 500mA, Ci = 0μF, Li = OmH.

Can be installed in zone 1 hazardous areas.

Mounts inside Liquip TP100 series truck plug or equivalent truck plugs.

-Plastic Body.
-Encapsulated electronic circuit board potted with epoxy.
TFE, 20 AWG Wire.

Ordering Information

DP305: Dummy Probe with 5 Outputs.

DP307: Dummy Probe with 7 Outputs.

Associated Equipment

TP100 Series: Overfill Truck Plug.

LDP202: 2 wire Aluminium Overfill Sensor.

RM140 Series: Overfill Gantry Monitor.


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