Monitran MTN/1140 Industrial Accelerometer
- Manufacturer: Monitran
- Category: Accelerometers and Vibration Sensors, Amplified, SENSORS
Vibration measurement in machine tool and paper machinery spindles requires low-profile sensors with sensitivity tailored to capture transient mechanical phenomena without saturating the acquisition channels. Standard-sized sensors induce an unwanted mass load, distorting the true resonant dynamics of the analyzed bearing or shaft.
This constant-current piezoelectric accelerometer overcomes mass interference with an ultra-slim 15 mm diameter and a weight of 30 grams. It provides a nominal sensitivity of 50 mV/g with a useful frequency response up to 15 kHz. This specific calibration to 50 mV/g is ideal for industrial applications where higher amplitudes in g are expected without compromising analog spectrum resolution compared to the more common 100 mV/g variants.
Designed with top-entry cable entry, its solid stainless steel chassis is protected with IP67 sealing to withstand cutting oil mist and sustained operating temperatures from -55°C to 140°C. It integrates double-armored ETFE cabling and galvanic base insulation, blocking ground loops caused by plant frequency converters.
- Optimized sensitivity of 50 mV/g (±10% at 80 Hz) for greater dynamic range at severe amplitudes.
- Ultra-slim body 15 mm of diameter with nominal mass of 30 g.
- Electrical insulation at the base and extreme temperature range of -55 °C to 140 °C.
- Three mechanical variants: MTN/1140F (Female 10-32), MTN/1140K (M8 tapered male) and MTN/1140S (M6 male).
Technical Frequently Asked Questions
1. In what industrial scenario is it preferable to use a sensitivity of 50 mV/g versus 100 mV/g?
The 50 mV/g calibration allows the accelerometer to measure larger vibration amplitudes before saturating the output voltage (+/- 50g effective dynamic). It is the right choice for paper machinery or pumps where more violent transient peaks are experienced than in precision spindles.
2. Why is its ultra-slim 15mm diameter critical?
The 15mm profile allows the sensor to be inserted vertically into tight engine shields and lubrication ducts where a standard industrial accelerometer will not physically fit, avoiding the need to install long mechanical adapters that distort high-frequency readings.
3. Does the upper cabling withstand continuous machining cutting fluids?
Yes, the integral cable is extruded in ETFE, a fluoropolymer highly resistant to aggressive chemicals and machine tool oils, further shielded by a braided stainless steel armor against cuts and chip impacts.
Properties
| Feature | Technical Specification |
| Sensor Type | Piezoelectric Accelerometer (Top Entry) |
| Standard Sensitivity | 50 mV/g (±10% at 80 Hz) |
| Frequency Response | 2 Hz to 15 kHz (±10%) |
| Resonance Frequency | 22 kHz (Nominal to the assembly) |
| Electrical Insulation | Isolated Base (Ground Loop Prevention) |
| Operating Temperature | Extended range from -55 °C to +140 °C |
| Transversal Sensitivity | < 5% |
| Electrical Noise | < 0.1 mg (Maximum) |
| Nutrition / Bias | 0.5 to 8 mA (Constant Current) / 12V DC |
| Body Material | Stainless Steel (Ultra-slim profile 15mm) |
| Dynamic Mass | 30 grams (Nominal) |
| Tightening Torque | 8 Nm (M8/M6) / 6 Nm (10-32 UNF) |
| Configurable Models | MTN/1140F (Female), MTN/1140K (Conical), MTN/1140S (M6 Male) |
| Electrical Connection | Integral ETFE cable overbraided in steel |
| Degree of Protection | IP67 (Industrial hermetic sealing) |
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