Model Explanation (330750-20)

330750: High-temperature Velomitor (HTVS) system, with sensor head and electronic part separated design

20: Cable length 2.0 meters, standard industrial grade (non-explosion-proof)

Core Parameters (Electrical / Performance)

Sensitivity: 5.7 mV/mm/s (145 mV/in/s) ±5% @100Hz

Frequency Response:

15 Hz～2000 Hz (±3.0 dB)

20 Hz～1000 Hz (±0.9 dB)

Measurement Range: 0～100 mm/s (peak-to-peak)

Output: AC voltage (proportional to speed)

Power Supply: +18～+30 VDC (power supply for preamplifier / signal conditioner)

Impedance: High impedance, strong long-line driving capability (up to 305m)

Mechanical and Environmental

Structure: Sensor head (piezoelectric element) + Separated signal electronic box + 2m hard wire cable

Material: Stainless steel casing, IP67 protection

Temperature:

Sensor head: -40℃ ～ +400℃ (can be directly attached to high-temperature surface)

Electronic box: -40℃ ～ +121℃ (needs to be installed in a low-temperature area)

Pressure: Maximum 20 bar

Explosion-proof: None (standard type)

System Composition (330750-20 Complete Set)

Sensor Head: 330750-20 (2m cable, high-temperature)

Signal Conditioner (Preamplifier): 330752 (matching electronic unit, must be purchased separately)

Monitoring Module: 3500/53 (speed / vibration monitoring), 3500/54, etc.

Key Features (Different from Ordinary Speed Sensors)

✅ High Temperature Resistance: Sensor head can withstand 400℃, suitable for boilers, steam pipes, high-temperature fan housings

✅ Separate Design: Electronic part is far away from high temperature, higher reliability

✅ Long-line Transmission: Hard wire cable, anti-interference, longest 305m without signal attenuation

✅ Non-contact / Contact Dual Use: Directly bolted to the housing / bearing seat

Typical Applications

Thermal Power / Nuclear Power: Boiler fans, induced draft fans, supply fans housings vibration

Petroleum and Chemical: High-temperature compressors, heating furnaces, steam turbine bearing seats vibration

Metallurgy: High-temperature motors, hot air furnaces, sintering machine vibration monitoring

Common Pairing Models

330750-20: 2m cable (your current model)

330750-50: 5m cable

330750-100: 10m cable

Matching Electronics: 330752 (must be paired)