| 型號 | pHTestr 50 | pHTestr 50S | ORPTestr 50 | PCTSTestr 50 |
| 范圍 | –1.00 to 15.0 pH | –1.00 to 15.0 pH | –1000 to 1000 mV | pH: ?1.00 to 15.0
Conductivity: 0.0 to 200.0 μS,
200 to 2000 μS; 2.00 to 20.00 mS
TDS: 0.0 to 100.0 ppm, 100 to 1000 ppm;
0.10 to 10.00 ppt (TDS factor 0.5) Salinity: 0.00 to 10.00 ppt |
| 分辨率 | 0.01 pH | 0.01 pH | ±1 mV | pH: 0.01
Conductivity: 0.1 μS, 1 μS; 0.01 mS
TDS: 0.1 ppm, 1 ppm; 0.01 ppt
Salinity: 0.10 ppt |
| 精度 | ±0.01 pH | ±0.01 pH | ±2 mV | pH: ±0.01
Conductivity: ±1% full-scale
TDS: ±1% full-scale
Salinity: ±1% full-scale |
| 溫度補償 | Automatic, 32 to 140°F (0 to 60°C) | Manual, 32 to 140°F (0 to 60°C) | Manual | Automatic, 32 to 140°F (0 to 60°C) |
| 校準點 | Up to 3 points | Up to 3 points | 1 point, offset ±200 mV | Up to 3 points (pH, conductivity and TDS) |
| 緩沖液 | USA 4.01, 7.00, 10.01;
NIST 4.01, 6.86, 9.18 | USA 4.01, 7.00, 10.01;
NIST 4.01, 6.86, 9.18 | — | USA 4.01, 7.00, 10.01;
NIST 4.01, 6.86, 9.18 |
| 溫度范圍 | 32 to 140°F (0 to 60°C) | 32 to 140°F (0 to 60°C) | 32 to 140°F (0 to 60°C) | 32 to 140°F (0 to 60°C) |
| 溫度分辨率 | 0.1°F/°C | 0.1°F/°C | 0.1°F/°C | 0.1°F/°C |
| 溫度精度 | ±0.9°F (0.5°C) + 1 LSD from 32 to 122°F (0 to 50°C); ±1.8°F (1.0°C) + 1 LSD from 122 to 140°F (50 to 60°C) | — | — | ±0.9°F (0.5°C) from 32 to 122°F (0 to 50°C); ±1.8°F (1.0°C) from 122 to 140°F (50 to 60°C) |
| 電池 | Four AAA 1.5 V batteries (included) | Four AAA 1.5 V batteries (included) | Four AAA 1.5 V batteries (included) | Four AAA 1.5 V batteries (included)
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