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400 Analytical Transmitter
The M400 2-wire/4-wire transmitters are single-channel, multi-parameter units for pH / ORP, oxygen, dissolved carbon dioxide, and conductivity measurement. Thanks to the unique mixed-mode input, which allows the use of digital ISM or analog sensors, the M400 offers a unique and smooth transition from analog to digital technology.
Advanced predictive diagnostics is one of the main benefits of the M400 transmitter series. Measurement data and sensor diagnostics tools such as the Dynamic Lifetime Indicator and Adaptive Calibration Timer can be output to control systems over a second analog output. Additionally, the M400 2-wire is compatible with Foundation fieldbus or HART protocols.
Intelligent Sensor Management (ISM), global hazardous area approvals, and the rugged design of the M400 transmitter series provide outstanding operating reliability and process safety in the most demanding applications.
Features and Benefits:
- pH/ORP, dissolved oxygen, CO2, conductivity, gas O2 and CO
- 1 channel, single or multi-parameter
- Digital ISM® or analog sensor inputs
- 4 x 0/4 to 20mA outputs or 2 x 4 to 20 mA (loop powered)
- HART®, Foundation fieldbus™
- Plug and Measure™
- Sensor diagnostics tools for predictive maintenance
| Product |
Parameter |
Hazardous Area Classification |
Sensor Type |
Communication |
| M400 4-wire |
pH/ORP, DO, O2 gas (amperometric and TDL technology), conductivity, dissolved CO2 |
ATEX Zone 2, FM CI1 Div2 |
Analog or ISM |
No |
| M400 2-wire |
pH/ORP, DO, O2 gas, conductivity |
M400/2H: NEPSI Zone 2, FM CI1 Div2 (in progress); M400(G)/2XH: ATEX Zone 1, NEPSI Zone 1, FM CI1 Div1 (in progress) |
Analog or ISM |
HART®, FOUNDATION fieldbus™ |
| M420 |
pH/ORP, DO, O2 gas, conductivity |
ATEX, IECEx, CSA, FM |
Analog or ISM |
HART® |
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