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| Brand | METER |
|---|---|
| Origin | USA |
| Model | TEROS 31 |
| Measurement Range | –150 to +50 kPa (standard range: –85 to +50 kPa) |
| Temperature Range | –30 to 60 °C |
| Resolution | ±0.0012 kPa / ±0.01 °C |
| Accuracy | ±0.15 kPa / ±0.5 °C |
| Output Protocols | SDI-12, Modbus RTU, TensioLink, DDI Serial |
| Power Supply | 3.6–28.0 VDC |
| Dimensions | 23.5 × 17.5 × 49.0 mm |
| Ceramic Tip Area | 0.5 cm² |
| Rod Diameter | 5 mm |
| Cable Length | 1.5 m |
| Connector | 3.5 mm 4-pole stereo plug |
| Operating Temperature | 0–50 °C |
| Certifications | ISO 9001:2015, CE (EN ISO/IEC 17050:2010) |
| Brand | METER |
|---|---|
| Origin | USA |
| Model | TEROS 21 |
| Measurement Range | 0 to –100,000 kPa |
| Temperature Range | –40 to +60 °C |
| Resolution | 0.1 kPa / 0.1 °C |
| Accuracy | ±(10% of reading + 2 kPa) from –5 to –100 kPa / ±1 °C |
| Sensor Type | Frequency-domain ceramic matrix with calibrated thermistor |
| Output | SDI-12 or DDI serial interface |
| Power Supply | 3.6–15 VDC |
| Dimensions | 9.6 × 3.5 × 1.5 cm (L×W×D) |
| sensing head diameter | 3.2 cm |
| Cable Length | 5 m (customizable up to 75 m) |
| Compliance | ISO 9001:2015, ISO/IEC 17050:2010 (CE) |
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