Single Point Insertion & Inline Gas Flow Meters

In many industries the need for monitoring gas flow involves hazardous gases, potentially dangerous operating environments or simply a desire for a rugged, industrial-strength configuration. These applications include many common manufacturing processes, natural gas submetering, compressed air auditing, etc. Our MP Series flow meters feature a robust physical design and an equally robust set of features to support a broad range of flow measurement requirements.

The Master-Touch™ MP Series flow meters are available for both inline and insertion style installations. Most inline flow meters are available with a number of mounting options including MNPT or butt weld ends and ANSI, DN or JIS flanges. Smaller sizes are available with compression fittings or clamp flanges. All inline style flowmeters for line sizes of 3/4” and larger include a pair of inlet flow conditioners. These conditioners help to improve problematic, uneven flow profiles by disrupting the gas flow and allowing it to assume a more uniform profile, without adding any significant pressure drop in most applications. Insertion style flow meters can be installed with compression fittings, ball valve assemblies or flanges welded to the probe support. Tube flow sections, electropolishing and a certified "O2 cleaning" service are just some of the other options available to meet almost any installation requirement.

Integral and remote style electronics enclosures are offered with the Master-Touch™ MP Series as well. The dual-sided integral enclosure allows access to the input/output wiring without exposing the internal electronics to the enviroment. The standard remote enclosure, approved for general purpose (Ordinary) locations, can be mounted for the user's convenience when the point of measurement isn't readily accessible, or is exposed to the elements through the year or is just at a distance away from areas commonly visited by the staff. An optional enclosure, approved for installation in hazardous area locations, is available for the remote electronics as necessary.

The Master-Touch™ MP Series is approved by CSA/CUS, ATEX, IECEx and KOSHA for use in hazardous area locations.


Linear signal output 0–5 VDC & 4–20 mA
Relay Output Two 1-amp @ 30 VDC, user-selectable alarm functions
Signal Interface LCD (flow rate, flow total, gas temperature)
RS232 & RS485 Modbus RTU
Optional HART or Profibus DP
Accuracy including linearity (Ref.: 21°C): ± (1% of Reading + 0.5% of Full Scale + GTC)
Repeatability ± 0.2% of Full Scale
Sensor response time 1 second to 63% of final value
Turn down ratio 100:1 @ 1500 SFPM/7.6 NMPS minimum FS
Ambient electronics temperature range -40° to 120°F (-40° to 50°F)
Gas temperature range -40° to 392°F (-40° to 200°C)
Consult factory for extended range.
Gas temperature coefficient (GTC) 0.02% Full Scale/°C
Gas pressure effect Negligible over ±20% of absolute calibration pressure
Pressure rating maximum:  
Inline flowmeters 500 PSI Std., >500 special
Insertion flowmeters  
.500” OD 125 PSI Std., >125 special
.750” OD 55 PSI Std., >55 special
1.000” OD 30 PSI Std., >30 special
Transmitter power requirements 5 Watts or less
Input power requirement 24VDC @ 250mA
  115 VAC 50/60 Hz optional
  230 VAC 50/60 Hz optional
RAM Back-up Lithium Battery, 2.5–3.5v, >10 years
Wetted materials: 316SS, including sensor
Standard temperature & pressure (STP) 70° F & 29.92" Hg
(Air .075 lb/cubic foot)  
NIST traceable calibration Standard

Specifications subject to change without notice.

MP Series Flow Transmitter — For use in hazardous area locations
CUS  ATEX Flow Meter  IEC Ex Flow Meter    KOSHA Flow Meter

MP Series Remote Enclosure —

For use in Ordinary (Non-Hazardous) area locations:
Type 4X, IP66

Optional ACEX/DCEX
Remote Enclosure —

For use in hazardous area locations

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