MPI Magnetostrictive Level Sensors
Installation Guide
For MPI-E, MPI-E Chemical, and MPI-R Intrinsically Safe
R
Automation Products Group, Inc.
1025 W 1700 N Logan, UT 84321
Thank You
Thanks for purchasing an MPI series magnetostrictive level sensor from us! We appreciate your
business and your trust. Please take a moment to familiarize yourself with the product and this
manual before installation. If you have any questions, at any time, don’t hesitate to call us at 888-
525-7300.
1. Description
2. How To Read Your Label
3. Warranty
4. Dimensions
5. Installation Guidelines &
Instructions
6. Sensor and System Wiring
7. General Care
8. Repair Information
9. Hazardous Location Wiring
Table of Contents
5Installation Guidelines & Instructions
The MPI should be installed in an area--indoors or outdoors--which meets the following
conditions:
• Ambient temperature between -40°F and 185°F (-40°C to 85°C)
• Relative humidity up to 100%
• Altitude up to 2000 meters (6560 feet)
• IEC-664-1 Conductive Pollution Degree 1 or 2
• IEC 61010-1 Measurement Category II
• No chemical corrosive to stainless steel (such as NH3, SO2, Cl2, etc.) (Not applicable to plastic-
type stem options)
• Ample space for maintenance and inspection
Additional care must be taken to ensure:
• The probe is located away from strong magnetic elds, such as those produced by motors,
transformers, solenoid valves, etc.
• The medium is free from metallic substances and other foreign matter.
• The probe is not exposed to excessive vibration.
• The oat(s) t through the mounting hole. If the oat(s) does/do not t, it/they must be
mounted on the stem from inside the vessel being monitored.
• The oat(s) is/are oriented properly on the stem (See Figure 5.1 below). MPI-E oats will be
installed by the factory. MPI-R oats are typically installed by customer.
4Dimensions
NOTE: Scan the QR code to the right to see the full
user manual on your tablet or smartphone. Or visit
www.apgsensors.com/support to nd it on our website.
Part # 200339
Doc #9005625 Rev C
Each label comes with a full model number, a part number, and a serial number. The model
number for the MPI will look something like this:
The model number correlates with all the congurable options and tells you exactly what you have.
Compare the model number to the options on the datasheet to identify your exact conguration.
You can also call us with the model, part, or the serial number and we can help you.
You’ll also nd all hazardous certication information on the label.
SAMPLE: MPI-R5-ZY-P3SB-120-4D-N
The MPI series magnetostrictive level sensor provides highly accurate and repeatable level readings
in a wide variety of liquid level measurement applications. It is certied for installation in Class I,
Division 1, and Class I, Zone 0 hazardous areas in the US and Canada by CSA, and ATEX and IECEX
for Europe and the rest of the world.
1Description
2How To Read Your Label
3Warranty
MPI-E Housing Dimensions MPI-R Housing Dimensions
Figure 5.1
UP
Taper
This product is covered by APG’s warranty to be free from defects in material and workmanship
under normal use and service of the product for 24 months. For a full explanation of our Warranty,
please visit https://www.apgsensors.com/about-us/terms-conditions. Contact Technical Support to
receive a Return Material Authorization before shipping your product back.
Scan the QR code below to read the full explanation of our Warranty on your tablet or smartphone.
IMPORTANT: Floats must be oriented properly
on the stem, or sensor readings will be inaccurate
and unreliable. Untapered oats will have a sticker or
etching indicating the top of the oat. Remove sticker
prior to use.
ATEX Stated Conditions of Use:
• Under certain extreme circumstances, the non-metalic parts incorporated in the enclosure of
this equipment may generate an ignition-capable level of electrostatic charge. Therefore the
equipment shall not be installed in a location where the external conditions are conducive to
the build-up of electrostatic charge on such surfaces. In addition, the equipment shall only be
cleaned with a damp cloth.
• The enclosure is manufactured from Aluminum. In rare cases, ignition sources due to impact
and friction sparks could occur. This shall be considered during installation.
Installation Instructions:
• If your sensor’s stem and oats t through the mounting hole, carefully lower the assembly
into the vessel, then secure the sensor’s mounting option to the vessel.
• If the oats do not t, mount them on the stem from inside the vessel being monitored. Then
secure the sensor to the vessel.
• For sensors with oat stops, refer to the assembly drawing included with the sensor for oat
stop installation locations.
Electrical Installation Instructions:
• Remove the housing cover of your MPI.
• Feed system wires into MPI through conduit openings. Fittings must be UL/CSA Listed for CSA
installation and IP65 Rated or better.
• Connect wires to MPI terminals. Use crimped ferrules on wires, if possible.
• Replace housing cover.
See Sensor and System Wiring Diagrams (section 6) for Modbus wiring examples.
MPI-E Chemical Housing Dimensions
4.21”
3.74”
7.32-7.44”
6.53-6.65”
5.00”
4.25”
5.71”
4.92”
Ø 0.27”
3/4” NPT
1/2” NPT
2.38”
4.94”
4.15”
GND
SCREW
ZERO
REFERENCE
3/4” NPT
1/2” NPT
Housing
Connection
Location
Note:
For dual dimensions, large
housing dimensions are
above small housing
dimensions.
5.00”
4.25”
5.71”
4.92”
Ø 0.27”
4.21”
3.74”
6.84” - 6.97”
6.05” - 6.18”
3/4” NPT
1/2” NPT
1.90”
4.94”
4.15”
GND
SCREW
ZERO
REFERENCE
3/4” NPT
1/2” NPT
Housing
Connection
Location
Note:
For dual dimensions, large
housing dimensions are
above small housing
dimensions.
5.71"
4.92"
5.00"
4.25"
2x
.27"
3/4" NPT
1/2" NPT
4.29"
3.70"
9.30"
8.51"
Min. 12"
Max. 153"
S1 Dead-Band
S2 Dead-Band
ZERO
REFERENCE
2.00"
3.50"
Float Ref.
Float Options
H & K
4.29"
3.70"
9.30"
8.51"
ZERO
REFERENCE
Note:
for dual dimensions,
large housing dimensions
are above small housing
dimensions.
3/4” NPT
1/2”NPT
