Monitran MTN/1130 Industrial Accelerometer

Manufacturer: Monitran
Category: Accelerometers and Vibration Sensors, Amplified, SENSORS

Vibration monitoring in lightweight, high-speed machinery requires sensors that do not alter the equipment's dynamics. Conventional accelerometers add excessive mass that modifies the system's natural resonant frequency, distorting pure measurements in small bearings and spindles.

This constant-current piezoelectric accelerometer solves the problem of added mass thanks to its ultra-thin 15 mm design and nominal weight of 30 grams. It operates with a sensitivity of 100 mV/g and a frequency response up to 15 kHz, ensuring that signal acquisition does not mechanically interfere with the actual vibration of the machine under test.

With a robust, IP67-rated stainless steel chassis and a galvanically isolated base to prevent ground loops, the unit continuously withstands harsh industrial environments from -55°C to 140°C. It features a braided ETFE top-entry cable and is available with three mounting options: female thread (F), M8 tapered bolt (K), or quick-release swivel base (QR) for easy installation in space-constrained areas.

Ultra-compact design (15 mm in diameter) with top-entry and a mass of 30g.
Frequency response of 2Hz to 15kHz with resonance at 22kHz.
Guaranteed extreme performance in temperature ranges of -55 °C to 140 °C.
Multiple mechanical versions: MTN/1130F (Female), MTN/1130K (Conical) and MTN/1130QR (Swivel).

Technical Frequently Asked Questions

1. What is the main difference between the F, K, and QR variants of this accelerometer?
The "F" variant includes a female thread (10-32 UNF) for use with adapter bolts. The "K" variant features a tapered M8 male bolt for superior mechanical engagement. The "QR" version incorporates an M6 quick-release swivel base, ideal for cable routing during installation.

2. Why does this sensor stand out in high-speed lightweight machinery?
Its ultra-slim 15mm body and mass of only 30 grams ensure that the resonance frequency of the monitored mechanical system is barely altered by the weight of the sensor itself, allowing pure vibrations to be measured up to 15 kHz.

3. How does it combat electromagnetic noise and ground loops?
It incorporates a Base Isolated design that electrically separates the accelerometer chassis from the machine's ground. This prevents noise from motors, pumps, or fans from interfering with the clean 100mV/g analog signal.

Properties

Feature	Technical Specification
Sensor Type	Industrial Accelerometer (Top Entry)
Standard Sensitivity	100 mV/g (±10% at 80 Hz)
Frequency Response	2 Hz to 15 kHz (±5%)
Resonance Frequency	22 kHz (Nominal to the assembly)
Electrical Insulation	Isolated Base (Prevents Ground Loops)
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	Solid Stainless Steel (15mm Profile)
Dynamic Mass	30 grams (Nominal)
Tightening Torque	8 Nm (M8/M6) / 6 Nm (10-32 UNF)
Fixing Options	Female 10-32 (F) / Male M8 (K) / Swivel M6 (QR)
Electrical Connection	Integral ETFE cable with steel mesh
Degree of Protection	IP67 (Industrial hermetic sealing)