Oem Manufacturer Piezoelectric Vibration IEPE Mode Voltage Type Sensors High Voltage Train Cable Sensor
S21D vibration sensor is a specialized high precision design based on piezoelectic acceleration sensors with an interal embeded precision integration circuit.
Features: intemal lEPE circuit,using piezoelectic crystal as sensitve elemen, no moving parts inside, no degradaton and wear. Long service ife, strong antiinterference ablity, wide frecuency reponse range, excelent dynamic characteristics, stainless steel housing,laser welded seals, double shielding (solation)waterproof, dustproof,ant-oil, range can be customized.
Applicatons: Measurement of absolute (relative to the free surface) vibraton of bearing housings, shells or structures in various harsh environments at industrial sites.
| Features | Unit | S21D04 | S21D20 |
| Measuring range (RMS) | mm/s | ±1270 | ±250 |
| Sensitivity (25℃) 土5% | mV/mm/s | 4 | 20 |
| Amplitude non-linearity | % | <2 | <2 |
| Frequency response(±1dB) | Hz | 10~1,000 | 10~1,000 |
| Frequency response (±3dB) | Hz | 4~1,000 | 4~1,000 |
| Transverse sensitivity | % | ≤5 | ≤5 |
| Excitation voltage | VDC | 18~28（constant current source） | 18~28（constant current source） |
| Excitation current | mA | 2~10 | 2~10 |
| Output impedance | Ω | ＜100 | ＜100 |
| Full scale output (peak) | V | ±5 | ±5 |
| Noise (rms) | μV | ＜50 | ＜50 |
| Bias voltage | V | +10~+14 | +10~+14 |
| Mounting insulation to ground | Ω | ≥108 | ≥108 |
| Operating temperature | ℃ | -40~+85 | -40~+85 |
| Shock limit (peak) | g | 2000 | 2000 |
| Structure and piezo material | Shear/PZT-5 | Shear/PZT-5 | |
| Outline dimension | See external dimension drawing | See external dimension drawing | |
| Housing material | 304 stainless steel | 304 stainless steel | |
| Electrical connector | MIL-C-5015 2-PIN socket | MIL-C-5015 2-PIN socket | |
| Mounting method | 1/4-28 | 1/4-28 | |
| Protection class | IP65 | IP65 | |
| Weight | g | ~80 | ~90 |
| Mounting bolts | 1/4~28 to M6 | 1/4~28 to M6 | |
| Connection cable | DJ03-3M | DJ03-3M |