M921 Precision Electromagnetic Flow Meter accurately measures flow of conductive liquids from 5 µS up. As there are no moving parts in the flow profile the flow meter can be applied to measure extremely polluted liquids containing even solid pollution. Evaluation and readout unit (transmitter) indicates both positive and negative flow as well as total and custom volume counters. Logged data can be shown on display or downloaded via RS232 or RS485 with Modbus protocol. Ex921 sensor for use in potentially explosive atmospheres in category II 3G EEx nA II T5/T6 is available in remote version of the flow meter.
M921 Upgrades
M921 is similar to MAG920 in terms of 0.25% accuracy, empty pipe and electronics diagnostic, liquid temperature measurement through excitation coils, I/O ports, datalogger and other functions. Thanks to modernized design, the M921 is now much easier to operate and maintain. It has 6 buttons, large dot-matrix display, customizable screen elements, easy-to-use clamp opening mechanism and more mounting options. Datalogger memory increased by factor of 60.
Features
- Range of diameter 15 to 800 mm
- Power supply 85…264vAC, 12, 24, 48vDC
- Empty pipe detection
- Excitation coils (liquid) temperature measurement
- Programmable data logger and real time as standard
- Remote control RS232, RS485 (Modbus)
- 6 programmable digital outputs and analog output 4-20mA, plus one digital input
- Dosing feature using digital input
- Pipe and electronic self diagnostic
Applications
- Chemical Industry
- Pharmaceutical Industry
- Food Industry
- paper Industry
- Water Industry
- Waste-water/ Sewage Industry.
The M921 flow meter is designed for measuring, indicating and storing flow and volume data of conductive liquids. The MAG920 flow meter records both positive and negative flow. As there are neither moving nor mechanical parts in the flow profile, the device can be applied to measure extremely polluted liquids containing even solid pollution. The only limitation is that the device can be used solely with conductive liquids.
The M921 flow meter is equipped with six isolated outputs and one isolated input as standard. Digital outputs (frequency, pulse and relays) and input is user configurable. Current output 4-20mA can be used as passive or active type. Communication with the unit is available via RS232 and RS485 outputs with Modbus protocols. Temperature measurement can be read on display, via Modbus or used for alarm purposes. The internal logger can record up to 900,000 readings with a programmable sample rate.
Please note, the product builder includes the standard options only. Earthing rings (required for certain pipe materials) and optional ANSI & DIN 11851 Flanges and higher pressure ratings available on request.
* Select only one of the Liner/Diameter options.
+44 (0) 1382 443000
Datasheet 
+44 (0) 845 9000 602
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