HM Digital (TDS-4) Handheld Digital TDS Meter-Monitor

Ideal for all water purification applications, wastewater regulation, aquaculture, hydroponics, and colloidal silver.

• Includes an internal digital thermometer (Celsius).
• The smallest and lightest TDS meter available on the market.
• Hold Function - Saves measurements for convenient reading and recording.
• Auto-off function - Turns off meter after 10 minutes of non-use to conserve batteries.
• Dual Range - Measures from 0 - 999 ppm, with a resolution of 1ppm. From 1000 to 9990 ppm, the resolution is 10 ppm, indicated by a blinking 'x10' image.
• Factory Calibrated: our meters are calibrated with a 342 ppm NaCl solution. Meters can be recalibrated with a mini-screwdriver.
• Recommended for aquariums & aquaculture, horticulture & hydroponics, pools & spas and water cooler professionals.