OTT MF pro Flow Meter

The OTT MF pro is a user-friendly, low maintenance electromagnetic flow meter for cost-efficient in-stream discharge measurement.


  • Calculates discharge automatically based on USGS and ISO methods
  • Velocity graphed in real-time on the meter's color display for trending
  • Electromagnetic sensor head has no moving parts and never requires calibration
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OTT MF pro Flow Meter

The OTT MF pro saves time and resources in the field by automatically calculating discharge (based on USGS and ISO methods) and graphing velocity data in real-time, allowing trends to be visualized quickly. The rod-mounted meter with color-display captures all data, allowing measurements to be taken by one person and eliminating the need for handwritten calculations or post-measurement data correction.

Ideal for Low-Flow Environments
A small, detachable electromagnetic sensor is ideal for use in low-flow environments by eliminating the need for minimum velocity requirements. Measurements are taken directly at the sensor head rather than from a sample volume farther away. The electromagnetic sensor has no moving parts, is virtually maintenance-free, and requires no calibration, unlike mechanical meters.

Unimpeded by Organic Matter
Electromagnetic sensors are preferred for use in conditions with large amounts of organic matter as their magnetic inductive measurement principle is not affected by organic matter in the sampling area like acoustic or mechanical meters. The OTT MF Pro is lightweight and water-resistant, featuring a full-color display that is easily readable, even in bright sunlight.

Real-time Velocity
Velocity is graphed in real-time on the meter's color display, allowing trends to be visualized quickly.

The electromagnetic sensor head has no moving parts and never requires calibration, making it virtually maintenance-free.

Versatile Applications
The sensor's magnetic inductive measurement principle makes the OTT MF pro ideal for use in low-flow conditions and environments heavy in organic matter, unlike mechanical or acoustic meters.

User-Friendly Handheld
A lightweight, water-resistant handheld features a full-color display that is easily readable even in bright sunlight.

(1) MF pro flow meter
(1) Carrying case for meter & sensor, includes shoulder strap
(1) Display mount for wading rod
(1) Velcro strap to coil cable
(1) Set of extra thumb screws
(1) USB communication cable
(1) Wall-charger and EU plug kit
(1) Lanyard
(1) Universal sensor mount
(1) Drying cloth
(1) Set of operating Instructions

Questions & Answers
Does the wading rod or velocity sensor come with the water flow meter?
No, the wading rod and velocity sensor are sold separately.
What is good about electromagnetic vs mechanical meters?
Electromagnetic sensors generally require less maintenance, do not require calibration and have no moving parts.
What is the battery life of this meter?
The meter has about an 18 hours and are rechargeable.
Does my Flow Meter store data?
The OTT MF pro Flow Meter stores up to 10 profiles (metering sites) with 32 vertical profiles per site. Data can be downloaded to a PC via a simple USB connection.
How long will my battery last?
The OTT MF pro Flow meter has a rechargeable lithium-ion battery that has approximately 18 hours of battery life.
Is the MF pro flow meter waterproof?
Yes, the OTT MF pro flow meter has an IP rating of IP67, protecting the meter against short periods of immersion in water.
What is the warranty on the MF pro?
The MF pro flow meter and sensors are covered by a 1-year manufacturer's warranty against defects in materials and workmanship.
What is the purpose of the optional depth sensor?
During a discharge measurement, a typical user will read the water depth from wading rod markings. With a the integrated depth sensor, water depth can be measured automatically, reducing human error in the field and providing increased accuracy.
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