4-20 mA Accelerometers for PLC Interface

The Monitran MTN/1185C is a general-purpose, top-entry velocity transducer designed for continuous vibration monitoring in harsh industrial environments. Built entirely from stainless steel and sealed to IP67, it delivers a two-wire 4–20 mA DC output proportional to rms velocity — connecting directly to PLCs, DCS systems, and other industrial controllers without the need for additional signal conditioning.

The transducer covers a frequency response of 2 Hz to 1 kHz (±10%) with a dynamic range of 50g peak and transverse sensitivity of less than 5%. Base isolation is included as standard, mounted base resonance is 5 kHz, and temperature sensitivity is just 0.08%/°C across an operating range of −25°C to +90°C. An integral stainless steel overbraided ETFE cable is supplied as standard at 5 m, with a maximum cable run of 100 m. Supply voltage is 12–32 V DC. Weight is approximately 150 g.

Three mounting configurations are available — ¼" UNF Female, Quick-Fit Female, and ½" NPT Male — each offered across five velocity ranges. A wide range of mounting studs, quick-fit adapters, mounting adapters, and isolation adapters is also available separately.

Typical applications include air handling units, building services, and fans.

Orderable Part Numbers

MTN/1185C — ¼" UNF Female mounting: 

• MTN/1185C-10 (0–10 mm/s)

• MTN/1185C-20 (0–20 mm/s)

• MTN/1185C-25 (0–25 mm/s)

• MTN/1185C-50 (0–50 mm/s)

• MTN/1185C-100 (0–100 mm/s)

MTN/1185CQ — Quick-Fit Female mounting:

• MTN/1185CQ-10 (0–10 mm/s)

• MTN/1185CQ-20 (0–20 mm/s)

• MTN/1185CQ-25 (0–25 mm/s)

• MTN/1185CQ-50 (0–50 mm/s)

• MTN/1185CQ-100 (0–100 mm/s)

MTN/1185NPTC — ½" NPT Male mounting:

• MTN/1185NPTC-10 (0–10 mm/s)

• MTN/1185NPTC-20 (0–20 mm/s)

• MTN/1185NPTC-25 (0–25 mm/s)

• MTN/1185NPTC-50 (0–50 mm/s)

• MTN/1185NPTC-100 (0–100 mm/s)