Testmeter.net. Offering Accuracy, Reliability, and Simplicity.
The use of "TDS" (total dissolved solids) meters for analyzing the purity of fresh water has become widespread in recent years. Many aquarists use them to determine if tap water purification systems such as reverse osmosis (RO) or reverse osmosis/deionization (RO/DI) are working properly, or if deionizing resins need to be replaced. By Randy Holmes-Farley, Ph. D.

HANDHELD TDS METER - TDS Mini Meter

Features Specifications Smallest in industry, ideal for carrying around, pocket clip & vinyl case included 4-digit LCD display. One button operation: ergonomic and easy to use. Auto shut off function - battery saver! Auto reading hold function (Reading stays even probe is not in water!) Calibration function. Super power saving: battery lasts for 5years under normal operation. Have your own logo! Custom logo available for order over 3000pc Range: 0-1999 PPM. Sensitivity: 1 PPM. TDS Probe Material: Stainless steel 316 Accuracy: ± 2% Storage Temperature: -20 ~80? Working Temperature: 10 ~40? Power: 3V Lithium CR2032 batteries Expected Battery Life: 5 year / 10,000 measurement Dimension: Approximately 128mm x 25mm x 20mm. Weight: Approximately 35g.

HANDHELD TDS METER - TDS Meter - New!

Features Specifications Smart color-warning feature - backlight changes from green to red to alert user when measurement is greater than 40ppm! NEW! Backlight color indication: Green: <40ppm Red: >40ppm 4-digit LCD displays up to 2999ppm. NEW!   One button operation: ergonomic and easy to use. Auto shut off function - battery saver! Auto reading hold function (Reading stays even probe is not in water!) Calibration function. Super power saving: battery lasts for 5 years under normal operation. Automatic Temperature Compensation (option). Range: 0-2999 PPM. NEW! Sensitivity: 1 PPM. TDS Probe Material: Stainless Steel 316 Accuracy: ± 2% Storage Temperature: -20 ~80? Working Temperature: 10 ~40? Power: 3V Lithium CR2032 batteries Expected Battery Life: 5 year / 10,000 measurement Dimension: Approximately 128mm x 25mm x 20mm. Weight: Approximately 35g.