Attractive Priced On Line TDS Meter from HM Instruments for Domestic Water Purifier Application. Monitor Performance of your purifier on line.

The TRM-1 is a unique monitor offering the user 3 points of contact during the filtration process. This TDS monitor allows for checking TDS levels at 3 points, such as with DI/RO (deionization / reverse osmosis), or multiple points in an RO system, and more.

The Smart Digital Refractometer that is always ready.

Smart Digital Refractometer to measure Salt%

COM-360 is a new breed of combo pH/EC/TDS/Temp meters with two different sensors on each end of the meter. 

HM Water Proof TDS meter with 2 years warantee From the mfg of world's most popular TDS tester

The Most Popular handheld conductivity tester in the World

Reliable, Rugged, Accurate, Handy , Pen Type pH Meter from HM

FEATURES

• Measures pH and Temperature
• One-touch automatic digital calibration
• Water resistant
• Simultaneous temperature display
• Sleek, lightweight design
• Large LCD display
• Automatic Temperature Compensation (ATC)
• Auto-off function, data-hold function and low-battery indicator
• Includes storage solution in a sponge embedded in a translucent cap
• Factory Calibrated: The PH-80 meter is factory calibration to pH 7.0. The meter can easily and quickly be recalibrated with digital calibration to pH 4.0, 7.0 or 10.0 using the meter's simple one-touch process.

Reliable, Rugged,Premium, Accurate, Handy, Waterproof pH Meter from HM

FEATURES

• Measures pH and Temperature
• Auto-ranging three point calibration with digital fine tuning
• Includes storage solution in a sponge embedded in a clear cap
• Waterproof housing (IP-67 rating)
• Simultaneous temperature display
• Measurement Range: 0-14 pH
• Digital automatic calibration (one point), with digital fine tuning
• Automatic Temperature Compensation (ATC)
• Auto-off function, data-hold function and low-battery indicator
• Display: large and easy-to-read LCD screen includes simultaneous temperature reading
• Replaceable Sensor (model SP-P2)
• Factory Calibrated: The PH-200 meter is three-point checked and factory calibrated to pH 7.0.  It can be re-calibrated to any point in its range with digital calibration using the push buttons.
• Includes a cap, batteries, lanyard, and pH 7.0 buffer

The DM-2 is a commercial grade monitor measuring TDS feed (input) water vs. product (output) water of a water filtration system at any time. With its shielded cables and diagnostic messaging this robust device is ideal for Reverse Osmosis (RO), Deionized water (DI) filtration systems that work well in applications such as drinking or potable water, Water treatment, Aquariums, Hydroponics and many more. 

Rugged, Accurate, Reliable Pen Type ORP Meter at Attractive Price from HM Instruments

FEATURES

• Measures Oxidation Reduction Potential (Redox) and Temperature
• Auto-ranging calibration with digital fine tuning
• Includes storage solution in a sponge embedded in a clear cap
• Waterproof housing (IP-67 rating)
• Simultaneous temperature display
• Digital Calibration (push button)
• Auto-off function, data-hold function and low-battery indicator.
• Display: large and easy-to-read LCD screen includes simultaneous temperature reading.
• Replaceable Sensor (model SP-O2)
• Factory Calibrated: The ORP-200 meter is factory calibrated to +92 mV The meter can be easily recalibrated with digital calibration using the push buttons, rather than a screwdriver.