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| Range | 0.0 to 100 mg/L (ppm) NH4+ | |
| Resolution | 0.1 mg/L (ppm) | |
| Accuracy | ±0.5 mg/L ±5% of reading @ 25°C | |
| Light Source | Tungsten Lamp | |
| Light Detection | silicon photocell with narrow band interference filter @ 420 nm | |
| Power Supply | 3x1.5V battery | |
| Environment | 0 to 50°C (32 to 122°F); RH max 100% | |
| Dimensions | 142.5 x 102.5 x 50.5 mm | |
| Weight | 380 g |
