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Ohaus Pen Meter ST20T-B Portable TDS and Temperature Meter
Product Description
The Ohaus Pen Meter ST20T-B (Model #30073981) is a portable starter pen meter designed for accurate Total Dissolved Solids (TDS) and temperature measurement with the following specifications:
- Meter Type: TDS (Total Dissolved Solids)
- Measurement Range: 0.0 – 1000 mg/L for TDS; 0.0 – 99.0 °C for temperature
- Accuracy: ±1.5% for TDS and ±0.5 °C for temperature
- Measurement Resolution: 1 mg/L
- Display: LCD with temperature display
- Temperature Compensation: Automatic (ATC) using a 50 KΩ NTC temperature sensor
- Conductivity Accuracy: ±1.5% within 0–1000 mg/L
- Automatic Shutdown: Enabled after 6 minutes of non-use to conserve battery life
- Battery: Powered by 4 AG13 disposable batteries (included), with an approximate battery life of 200 hours
- Physical Dimensions: 7.28 in x 1.5 in x 1.77 in (185 mm x 38 mm x 45 mm)
- Weight: 3.88 oz (110 g)
- Protection Rating: IP67 waterproof, suitable for rugged and wet environments
- Ergonomics: Durable plastic housing with a protective sensor cap and wrist strap to prevent accidental drops
- Working Environment: Temperature range 10°C – 40°C (50°F – 104°F), relative humidity up to 85%, non-condensing
- Controls: Three-button interface for simple operation
This meter delivers fast, straightforward, and reliable electrochemical measurements suitable for field and laboratory usage where portability and durability are required.
Item Stats
Product details
| Meter Type | TDS |
| Measurement Range | 0.0 – 1000 mg/L; 0.0 – 99.0 °C |
| Accuracy | ± 1.5% / ± 0.5 °C |
| Measurement Resolution | 1 mg/L |
| Display | LCD |
| ATC | Yes |
| Temperature Compensation | Automatic |
| Accuracy ± (Temperature) | 0.5 °C |
| Automatic Shutdown | Yes, After 6 minutes of non-use |
| Battery Life | 200 Hours with Disposable Batteries |
| Conductivity accuracy (±) | 1.5 % |
| Conductivity measuring range | 0 – 1000 mg/L |
| Dimensions (HxLxW) | 7.28 in x 1.5 in x 1.77 in (185 mm x 38 mm x 45 mm) |
| Measurement Range (Temperature) | 0 °C – 99 °C |
| Net Weight | 3.88 oz (110 g) |
| Number of Buttons | 3 |
| Power | 4 AG13 Batteries (Included) |
| Protection Rating | IP67 |
| Temperature Display | Yes |
| Temperature Range | 0 °C – 99 °C |
| Temperature Sensor | 50 KΩ NTC |
| Working Environment | 50°F – 104°F, 85%RH, non-condensing (10°C – 40°C, 85%RH, non-condensing) |
| Wrist Strap | Yes |
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