4-20mA Speed Transducer MTN/1185
- Manufacturer: Monitran
- Category: Accelerometers and Vibration Sensors, SENSORS
MTN/1185 Speed Transducer. Converts vibration into a 4-20 mA DC (2-wire) current loop proportional to RMS speed, for direct connection to a PLC or SCADA system without external conditioners. Applications: industrial fans, pumps, and compressors.
Factory speed ranges: 0-10, 0-20, 0-25, 0-50 or 0-100 mm/s RMS. Frequency response: 2 Hz to 1 kHz (±10%). Power supply: 12 to 32 V DC, powered by the loop itself.
Stainless steel housing with IP67 protection rating. The base is galvanically isolated, protecting the signal from 50/60 Hz electrical interference. Connection via connector (top or side SCE input) or sealed integral cable.
- 4-20 mA output proportional to RMS speed.
- Configurable series: speed ranges and connection types.
- Isolated base and IP67 protection.
- Operating temperature: -25 °C to +90 °C.
- Mounted resonance: 5 kHz (nominal value).
- Linearity: less than 1% (FS).
- Cross-sectional sensitivity: less than 5%.
- Mounting torque: 8 Nm.
Technical Frequently Asked Questions
1. What sub-models does the MTN/1185 series include?
Three connection variants: MTN/1185 with top connector, MTN/1185C with factory-sealed integral cable, and MTN/1185Q with quick-disconnect Quick-Fit connector. All share the same 4-20 mA electronics.
2. Is it possible to change the speed range after purchase?
No. The speed range (e.g. 0-20 mm/s) is set in the electronics during manufacturing and is specified when ordering.
3. What happens if the current loop is broken?
The PLC detects a drop to 0 mA as an open loop error or cable break. This distinguishes between a stopped machine (4 mA), a vibrating machine (4-20 mA), and a measurement system failure (0 mA).
Properties
| Feature | Technical Specification |
| Device Type | Configurable RMS Velocity Transducer |
| Sub-models of the Series | MTN/1185 (Connector), MTN/1185C (Cable), MTN/1185Q (Quick-Fit) |
| Speed Ranges | 0-10, 0-20, 0-25, 0-50 or 0-100 mm/s RMS |
| Exit Signal | 4-20 mA DC (2-wire loop) |
| Frequency Response | 2 Hz to 1 kHz (±10%) |
| Supply Voltage | 12V to 32V DC (Loop powered) |
| Operating Temperature | -25 °C to +90 °C |
| Degree of Protection | IP67 (Industrial Sealing) |
| Housing Material | Stainless steel |
| Electrical Insulation | Galvanically Isolated Base |
| Mounted Resonance | 5 kHz (Nominal value) |
| Technical Linearity | Lower than 1% (FS) |
| Transversal Sensitivity | Less than 5% |
| Mounting Torque | 8 Nm |
| Connection Options | Top Entry or Side Entry (SCE) |
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