HM Digital PM-2 External In-Line TDS Purity Monitor

The HM Digital PM-2 is a reliable, factory-calibrated Total Dissolved Solids (TDS) monitor designed for continuous water quality monitoring in enclosed systems such as water coolers, reverse osmosis (RO) units, and other water purification setups.

It provides real-time alerts when TDS levels exceed user-defined thresholds, ensuring timely maintenance and optimal system performance.

Key Features

• Continuous TDS monitoring – ideal for most water purification systems
• User-settable TDS threshold (any even number between 2–200 ppm)
• Warning light and optional audible alarm alert users when maintenance is required
• Standard 1/4" fittings
• Compact design with a 62.86 cm (24.75") cable for flexible installation

Specifications

• Measurement Range: 0–200 ppm (mg/L)
• Accuracy: ±2%
• Calibration: Factory calibrated
• Alert Light: Red or yellow, flashing or steady
• Audible Alarm: Beeps for 20 seconds, then stops
• Power Supply: 240VAC to 12DC adapter (Included)
• Cable Length: 62.86 cm (24.75")
• Fittings: 1/4" quick connect
• Max Water Pressure: 200 PSIG (at 23°C with 1/4" fitting)
• Dimensions: 12.9 x 7.3 x 6 cm (5 x 2.9 x 2.4 in.)
• Weight: 340 g (12 oz.)

Ideal Applications

• Water coolers
• Reverse osmosis (RO) systems
• Aquarium filtration
• Laboratory water systems
• Any enclosed purification system requiring TDS monitoring

Installation & Usage Tips

• Install the monitor in-line with your water flow for best results
• Set your TDS threshold based on your system’s maintenance needs
• Check the indicator light and listen for the alarm to stay ahead of issues

Note: Always follow the manufacturer’s instructions when installing and using this product.