The OTT MF pro is a user-friendly, low maintenance electromagnetic flow meter for cost-efficient in-stream discharge measurement. 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 screen captures all data, allowing measurements to be taken by one person and eliminating the need for handwritten calculations or post-measurement data correction.

A small, detachable electromagnetic sensor is ideal for use in low-flow environments by eliminating the need for minimum velocity requirements, and 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.

Additionally, 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. Electromagnetic sensors are a cost-effective option for budget-conscious monitoring organizations, making the OTT MF pro a practical choice for discharge measurement in a variety of environmental applications.

• Discharge automatically calculated: the OTT MF pro computes discharge automatically based on USGS and ISO methods, saving time and eliminating potential for error caused by written transcription
• Real-time velocity: velocity is graphed in real-time on the meter's color display, allowing trends to be visualized quickly
• Maintenance-free: 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

Includes:

• (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

Velocity measurement    

• Measurement method     Magnetic-inductive
• Measuring range:     0 ... 6 m/s
• Accuracy    
• Accuracy at 0 … 3 m/s     ±2 % of meas. value ±0.015 m/s
• Accuracy at 0 … 5 m/s     ±4 % of meas. value ±0.015 m/s
• Zero stability     ±0.015 m/s

Resolution    

• 0.001 at measured value     <10
• 0.01 at measured value     <100
• 0.1 at measured value     >100

Depth measurement (option)    

• Absolute pressure sensor     with single point calibration
• Measuring range:     0 ... 3.05 m
• Accuracy:     The larger of ±2% of measured value or ±0.015 m

Methods for velocity measurement    

• Streams:     1, 2, 3, 5, and 6 point measurement (ISO / USGS standards)
• Conduits (canalization):     0.9 x Vmax; 0.2/0.4/0.8; 2D

Velocity integrating method

• Conduit profiles:     Circular, rectangular, trapezoidal, 2/3 egg, inverted 2/3 egg

Methods for discharge calculation    

• EN ISO 748     Mid and Mean section method

• Power supply     Lithium-ion battery
• Lifetime     18 hours typ. (20°C)
• Data memory capacity     Up to 10 measuring locations (of 32 vertical profiles each)
• Temperature     -20 ... +60°C (operation/storage)

• Graphic colour display, transflective     LCD 3.5', QVGA
• Handheld unit interface:     USB Mini B type, 5-pin
• Export format     TSV (Tab Separated Value) file format
• Operating modes     Real-time velocity measurement, Discharge profile (stream/conduit)
• Noise suppression     50 Hz, 60 Hz (adjustable)
• Cable lengths     2 m, 6 m,12 m, and 30 m
• Material    
• Sensor housing:     ABS, glass-fiber reinforced
• Handheld unit:     Polycarbonate, moulded,by shock-absorbing elastomer (TPE)

• Sensor body:    
• L x W x H:     11.9 cm x 4.3 cm x 6.3 cm
• Weight:     0.5 kg ( with 6 m cable)

• L x W x H:     21.8 cm x 9.3 cm x 5.3 cm
• Weight:     0.68 kg
• IP class of protection    
• Sensor:     IP68
• Handheld unit:     IP67 (USB cap attached)