Small, economical pen meters offer simple, fast, and straightforward operation. With durable IP67 waterproof ABS housing, protective sensor cap, and an automatic shutdown feature that preserves battery life, OHAUS pen meters can endure consistent use in rough, we  environments. Equipped with a wrist strap to prevent accidental drop and damage.
Features:
- Applications: pH, oxidation-reduction potential (ORP), conductivity, dissolved oxygen (DO), salinity, total dissolved solids (TDS), temperature measurement
- Display: Liquid crystal display (LCD) display with secondary information line (on select models)
- Operation: 4 1.5V batteries (included)
- Communication: N/A
- Construction: ABS Housing
- Design Features: Easily replaceable electrodes, automatic shut off feature
- NTEP Approved (legal for trade)
Specifications:
- ATC: With Temperature Display, Without Temperature Display, Yes, with temperature display
- ATC Range: 0 – 45 °C
- Temperature Range: 0.0 – 99.0 °C, NA
- Temperature Compensation: Yes, NA
- Display: Dual, Single
- Calibration: 3 Point, N/A
- IP Grade: IP67
- Buffer Group: 4.01, 7.00, 10.01, N/A
- Automatic Shutdown: 6 Minutes of Non-Use, 6 Minutes of Non-Use
- Batteries: 4 AG13 1.5V Micro Alkaline, 4 AG13 1.5V Micro Alkaline
- Battery Life: 100 hours
- Size/Weight: 185 × 45 × 38 mm/110 g, 185 × 45 × 38 mm/110 g, 185 × 42 × 37 mm/90 g
- Auto-off: After 15 Minutes of Inactivity
- Auto Temperature Compensation Range: 5 to 45 °C (41 to 113 °F)
- Materials: ABS
- Warranty: 1 year
- NTEP Approved (legal for trade)
Models:
- ST10 range: 0.00 – 14 pH x ±0.1 pH
- ST20 range: 0.00 – 14 pH x ± 0.05 pH
- ST10R range: -1000 – 1000 mV x 2mV
- ST20R range: -1000 – 1000 mV x ± 2 mV
- ST10C-A range: 0.00 – 199.9 μs/cm x ±2.5% FS
- ST10C-B range: 0 – 1999 μs/cm x ±2.5% FS
- ST10C-C range: 0.00 – 19.99 ms/cm x ±2.5% FS
- ST20C-A range: 0.00 – 199.9 μs/cm x ± 1.5% / 0.0 – 99.0 °C x ± 0.5 °C
- ST20C-B range: 0.00 – 19.99 ms/cm x ± 1.5% / 0.0 – 99.0 °C x ± 0.5 °C
- ST20C-C range: 0.00 – 19.99 ms/cm x ± 1.5% / 0.0 – 99.0 °C x ± 0.5 °C
- ST10S range: 0.0 – 10.0 ppt x ±2.5% FS
- ST20S range: 0.0 – 80.0 ppt x ± 1.5%
- ST20M-B range: 0.00 – 14 pH x ± 0.05 pH
- ST20M-C range: 0.00 – 14 pH x ± 0.05 pH
- ST20D range: 0.0 – 19.9 mg/L x ±0.5 °C
- ST10T-A range: 0.0 – 100.0 mg/L x ±2.5% FS
- ST10T-B range: 0.0 – 1000 mg/L x ± 10mm
- ST20T-A range: 0.0 – 1000 mg/L x ± 1.5% / 0.0 – 99.0 °C x ± 0.5 °C
- ST20T-B range: 0.0 – 100.0 mg/L x ± 1.5% / 0.0 – 99.0 °C x ± 0.5 °C
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