Intrinsically Safe Velocity Transducer Monitran MTN/2285
- Manufacturer: Monitran
- Category: Accelerometers and Vibration Sensors, Amplified, ATEX, SENSORS
Intrinsically safe speed transducer with ATEX and IECEx (Ex ia IIC T6 Ga) certification, Group II, Zones 0, 1 and 2. 4-20 mA DC output proportional to RMS speed (mm/s), with connection to control systems via Zener barriers.
Top-entry output. Isolated Faraday cage electronics. Configurable measuring range from 0-10 to 0-100 mm/s RMS. 12 V to 32 V DC power supply.
Solid stainless steel body, IP67. 4-pin M12 connector. Operating temperature from -55 °C to +65 °C (certified T6 range). Applications: monitoring of motors, fans, and compressors in explosive atmospheres.
- ATEX and IECEx Group II certification for Zones 0, 1 and 2.
- 4-20 mA output proportional to RMS speed (configurable range).
- Frequency response: 2 Hz to 1 kHz (±10%). Resonant frequency: 5 kHz (nominal).
- Solid stainless steel, dynamic mass 140 g (nominal), tightening torque 8 Nm.
- Models: MTN/2285I (1/4″ UNF) and MTN/2285IQ (Quick Fit).
Technical Frequently Asked Questions
1. Is the use of Zener barriers mandatory?
Yes. To maintain certification validity in classified areas, the MTN/2285 must be installed with an intrinsically safe barrier (such as the MTL7787+) that limits the energy reaching the sensor.
2. What speed measurement ranges are available?
It is factory configured with scales of 0-10, 0-20, 0-25, 0-50 or 0-100 mm/s RMS for the 4-20 mA signal.
3. Why is the temperature range from -55 °C to +65 °C?
It is limited by the requirements of the T6 intrinsic safety certification.
Properties
| Feature | Technical Specification |
| Sensor Type | Speed Transducer (Intrinsically Safe) |
| Ex Certification | ATEX and IECEx Group II (Zones 0, 1, 2) |
| Analog Output | 4-20 mA DC (Proportional to RMS Speed) |
| Power Range | 12V to 32V DC |
| Frequency Response | 2 Hz to 1 kHz (±10%) |
| Resonance Frequency | 5 kHz (Nominal) |
| Electrical Insulation | Electronics in an isolated Faraday cage |
| Measuring Range | 0-10 up to 0-100 mm/s RMS (Configurable) |
| Operating Temperature | -55 °C to +65 °C (T6 certified range) |
| Body Material | Solid Stainless Steel |
| Dynamic Mass | 140 grams (Nominal) |
| Electrical Connection | 4-pin M12 connector |
| Configurable Models | MTN/2285I (1/4″ UNF) and MTN/2285IQ (Quick Fit) |
| Tightening Torque | 8 Nm |
| Degree of Protection | IP67 |
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