Industrial Precision Piezo Current Vibration Sensor Transducer 4-20ma for Measure Absolute Vibration Velocity
S31 and S38 integrated vibration transmitters are specialized and highly sophisticated designs based on acceleration sensors with precision integration circuits embedded inside.
Features: using piezoelectric crystal as the sensitive element, no intenal moving parts, no degradation and wear. Mechanical moving parts are not easy to damage strong anti-jamming ability frequency response range wide dynamic characteristcs excellent stainless steel housing laser welding sealing double shielding (isolaton)waterproof, dustproof, anti-oil range can be customized.
Application: Measurement of bearing box,shell or structure of the absolute /(relafive to the free surface) vibration suitable for industrial sites in a varietv of high-temperature environment
| Features | Unit | S31D25 | S31D20-DCV | S31WD25 | S38D20Z | S31GT20 |
| Measuring range (RMS) | mm/s | 0~25.4 | 0~20 | 0~25 | 0~20 | 0~20 |
| Output | mA | 4~20 | 1-5Vdc | 4~20 | 4~20 | 4~20 |
| Amplitude non-linearity | % | <2 | <2 | <2 | <2 | <2 |
| Frequency response(±1dB) | Hz | 10~1,000 | 10~1,000 | 10~1,000 | 10~1,000 | 10~1,000 |
| Frequency response(±3dB) | Hz | 5~1,000 | 5~1,000 | 5~1,000 | 5~1,000 | 5~1,000 |
| Transverse sensitivity | % | ≤5 | ≤5 | ≤5 | ≤5 | ≤5 |
| Supply voltage | VDC | 15~30 | 15~30 | 15~30 | 15~30 | 15~30 |
| Mounting insulation to ground | Ω | ≥108 | ≥108 | ≥108 | ≥108 | ≥108 |
| Operating temperature | ℃ | -40~+85 | -40~+85 | -40~+85 | -40~+150 | -40~+250（Surface temperature） |
| Shock limit (peak) | g | 2000 | 2000 | 1000 | 1000 | 1000 |
| Structure and piezo material | Shear/PZT-5 | Shear/PZT-5 | Shear/PZT-5 | Shear/PZT-5 | Shear/PZT-5 | |
| Outline dimension | See external dimensions Fig. 1 | See external dimensions Fig. 1 | See external dimensions Fig. 1 | See external dimensions Fig. 2 | See external dimensions Fig. 3 | |
| Housing material | 304 stainless steel | 304 stainless steel | 304 stainless steel | 304 stainless steel | 304 stainless steel | |
| Electrical connector | MIL-C-5015 2-PIN socket | MIL-C-5015 3-PIN socket | 2P terminal or 2-wire reference | MIL-C-5015 2-PIN socket | MIL-C-5015 2-PIN socket | |
| Mounting method | 1/4-28 | 1/4-28 | M8*1 Threaded(optional) | M8*1.25 | 1/4-28 | |
| Protection class | IP65 | IP65 | IP65 | IP65 | IP65 | |
| Weight | g | ~80 | ~80 | ~300(Without explosion-proof housing) | ~160(Vibration measurement) | ~200 |
| Mounting bolts | 1/4-28 to M6 | 1/4-28 to M6 | - | M8 Through bolt | 1/4-28 to M6 | |
| Connection cable | DJ03-3M | DJ03-3M | - | DJ03-3M | DJ03-3M |