Description
Product Documentation
The HM Digital TDS-3 meter is supported by official documentation to ensure correct usage, calibration, and long-term accuracy during water quality testing.
- HM Digital TDS-3 Manual
- HM Digital TDS Meter General Usage and Calibration Instructions
Features
The TDS-3 meter is engineered for efficiency, accuracy, and ease of use in commercial and professional environments.
- Ideal for commercial use and includes a protective carrying case with belt clip.
- Advanced microprocessor technology ensures high accuracy and efficient performance.
- Hold function allows measurements to be saved for easy reading and recording.
- Auto-off function shuts the meter off after 10 minutes of inactivity to conserve battery life.
- Measurement range of 0–9990 ppm with 1 ppm resolution up to 999 ppm and 10 ppm resolution above 1000 ppm, indicated by a blinking “x10” icon.
- Built-in digital thermometer for temperature measurement.
- Large, easy-to-read LCD display.
- Factory calibrated using a 342 ppm NaCl solution and can be recalibrated using a mini screwdriver.
- Backed by a 3-year warranty.
Specification
Technical specifications outlining measurement ranges, accuracy, power requirements, and physical characteristics of the TDS-3 meter.
- TDS Range: 0–9990 ppm (mg/L)
- Temperature Range: 0–80°C
- Resolution: 0–999 ppm: 1 ppm; 1000–9990 ppm: 10 ppm (indicated by “x10” icon)
- Temperature Resolution: 0.1°C (Celsius only)
- EC-to-TDS Conversion Factor: NaCl (average 0.5)
- ATC: Built-in automatic temperature compensation from 1–50°C (33–122°F)
- Power Source: Two 1.5V button cell batteries (LR44 or equivalent, included)
- Battery Life: Approximately 1000 hours of use
- Dimensions: 15.5 × 3.1 × 2.3 cm (6.1 × 1.25 × 1 in)
- Weight with Case: 76.5 g (2.7 oz)
- Weight without Case: 56.7 g (2.0 oz)
- Accuracy: ±2%


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