• APG MPX-R MPX-T API 18.2 Custody Transfer Magnetostrictive Level Transmitters
  • Oil floats on top of water in a tank. An MPX API 18.2 is installed in the tank, with a water-level float and oil-level float floating on water and oil. They rise and fall with the water and oil.
  • Tank with MPX API 18.2 sits by an oil well.
  • APG MPX-R API 18.2 Custody Transfer Magnetostrictive Level Transmitters
  • APG MPX-T API 18.2 Custody Transfer Magnetostrictive Level Transmitters

API 18.2 Custody Transfer Approved Magnetostrictive Level Probes

MPX API 18.2

Certified Accuracy For Oil Storage and Transfer

The MPX-R offers a 1"-diameter, stainless steel stem, while the MPX-T uses a 1"-diameter titanium stem for a larger range of chemical compatibility. All models come with required digital temperature sensors and feature large, robust floats that resist fouling.


MPX API 18.2 Custody Transfer Magnetostrictive Level Sensors provide the highly accurate and repeatable level and temperature readings necessary for oil storage and transfer from lease tanks.

Modbus Output
The RS-485 Modbus RTU output of the MPX API 18.2 gives you precise level measurements and fully configurable level or volume output that can be accessed with industry standard control protocols.

Built For Hard Work
This liquid level sensor is built to take a beating - designed for high turbidity environments in hazardous locations. It also has several materials options for the stem and floats for maximum chemical compatibility.

Tank Cloud Compatible
With 1"-diameter stems and large, buoyant floats, the MPX API 18.2 is built for the rough and tough environment of oil storage and oil transfer.



±0.04 in. (±1mm) over range
Modbus: 0.04 in. (1mm)
Temperature Sensors
±0.25°C over -40° - 85°C
±0.13°C over +20° - 70°C


Supply Voltage
12-24 VDC
Typical Current Draw
25 mA
Reverse polarity
Surge protection (IEC 61000-4-5)


Class I Division 1 Groups C & D T4 (Ta 85°C)
Class I Division 2 Groups C & D T4 (Ta 85°C)
Class I, Zone 1; AEx d IIB T4
Class I, Zone 2; AEx nA IIB T4
Ex d IIB T4
Ex nA IIB T4


Modbus RTU (RS-485) with Temperature output
Internet Connectivity
Tank Cloud LOE Master


Optional RST-6001 USB to RS-485 converter


Cast aluminum, epoxy coated
316L SS (MPX-R)
Titanium 2 (MPX-T)
Stem Length
MPX-R: 10 - 31.5 ft. (3.05 - 9.60 m)
MPX-T: 10 - 25 ft. (3.05 - 7.62 m)


Operating Temperature
-40° to 185° F (-40° to 85° C)
Protection Rating