Dual-Probe TDS EC Water Meter Online Monitor for Tap Water and Aquarium 5000ppm
The DM-3 Dual Probe TDS Monitor is a commercial‑grade online detector designed to measure TDS and EC in both the feed water and product water of filtration systems in real time. With a large backlit display, you can clearly read results even in dim environments, making it ideal for RO and deionized water setups, drinking water applications, aquariums, hydroponics, and more. Dual probes continuously monitor water quality at the input and output points, helping you spot membrane breakthrough, leaks, or shifts in water conductivity before problems arise.
Built for reliability, the DM-3 features shielded sensor cables to minimize interference and diagnostic messaging to simplify troubleshooting. It ships with two 1/4″ T-fittings (with options for 3/8″ or 1/2″ fittings) and a dual sensor (SP-3) setup for quick, secure connections. The combination of robust microprocessor control and straightforward calibration makes this monitor a dependable choice for precise, repeatable readings across drinking water, aquariums, hydroponics, and more.
Key benefits include automatic power saving (auto‑off after 3 minutes), factory calibration with a 342 ppm NaCl solution, and digital calibration for repeatable accuracy. The device is designed to provide clear TDS readings for both feed and product water, with diagnostic error messaging to help you quickly identify and address issues. Shielded cables and a compact form factor keep installation clean and readings stable in a variety of environments.
Benefits & Tips
- Monitor input vs. output water in real time to verify RO membrane performance and detect breakthrough or leaks.
- Keep aquarium or hydroponic water within target TDS ranges to protect aquatic life and optimize nutrient delivery.
- Use the shielded cables and dual probes to minimize interference for accurate, repeatable readings across different setups.
Product specifications
- EC Range: 0–9999 μS / 0–9.99 mS
- TDS Range: 0–5000 ppm / 0–5 ppt
- EC Resolution: 0.1 μS (0–99.9), 1 μS (100–999), 10 μS (1000–9990), 0.01 mS (0.00–9.99)
- TDS Resolution: 0.1 ppm (0–99.9), 1 ppm (100–999), 10 ppm (1000–5000), 0.01 ppt (0.00–5.00)
- Accuracy: ±2%
- ATC (Temperature Compensation): 0.0–60.0 °C
- TDS Conversion Factor: NaCl (0.5 avg.)
- Cable Length: 1.2 m / 3.9 ft, shielded
- Sensor: Dual, 1/4″ diameter for quick-connect fittings (model SP-3, included)
- Display: DIGITAL with Backlight
- Power Source: 2 x AA batteries
- Size: 11.6 × 1.9 × 7.0 cm (4.6 × 0.7 × 2.8 in)
- Weight: 225 g (7.9 oz)
- Fittings: Comes with two 1/4″ T-fittings (option for 3/8″ or 1/2″ available)
- Origin: Mainland China
Package includes:
- DM-3 Dual TDS Monitor
- Dual SP-3 sensors
- Shielded sensor cables
- Two 1/4″ T-fittings (with optional sizes available)
- 1.2 m shielded cable assembly
Warnings / Reminders
- Auto-Off function conserves power by shutting the unit off after 3 minutes of inactivity.
- Factory calibration uses a 342 ppm NaCl solution; digital calibration is available for precise adjustments.
- Ensure proper connection of the 1/4″ fittings to maintain accurate readings and avoid leaks.
All electronic and mechanical equipment, devices and machines sold by InterCyprus to EU countries are CE certified and carry a two year warranty.
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