DM-2 Commercial In-Line Dual TDS Monitor

DM-2 Commercial In-Line Dual TDS Monitor   Descriptions: Install on industrial systems such as car washes, window washing, manufacturing, and food processing. UPGRADED APRIL 2012! The newly upgraded model features digital calibration, low battery indicator, improved accuracy, longer battery life (2 years), longer auto shut-off time (3 min), diagnostic error messaging, and shielded sensor cables. (Upgraded features below are in red.)
  Features:
Highly efficient and accurate due to its advanced microprocessor technology.
Displays TDS levels of the Feed Water and Product Water with in & out electrode probes.
Auto-Off function conserves battery power. The unit shuts off automatically after 3 minutes.
Dual Range - Measures from 0-999 ppm, with a resolution of 1 ppm. From 1000 to 9990 ppm, the resolution is in 10 ppm increments, indicated by a blinking 'x10' image.
Factory Calibrated: our meters are calibrated with a 342 ppm NaCl solution. The DM-2 features digital calibration.
Diagnostic error messaging
Shielded sensor cables
Comes equipped with 1/4 inch Mur-lok® Quick-Connect T-fittings. Also available with 3/8" or 1/2" fittings.
Installs quickly and easily.
Differences from the DM-1:
Designed for commercial/industrial applications.
Stronger, water-resistant casing.
Digital calibration can be done individually on each line.
Improved design, including an extra large, easy-to-read LCD display.
Longer, waterproof, shielded cables.
Variable mounting bracket.

Specifications:
Range: 0-9990 ppm
Accuracy: ±2%
Conversion Factor: NaCl (avg. 0.5)
Cable Length: 46" (including sensor), shielded cables
Sensor: Dual, 1/4" diameter for quick-connect fittings (model SP-3, included)
Digital Calibration: Digitally factory calibrated to NaCl 342 ppm. Re-calibration can be done separately for each line.
Power source: 2 x AA batteries (included)
Battery life: Approx. 2 years
Size: 11.6 x 6.8 x1.8 cm (4.6 x 2.6 x .7in.)
Weight: 201.3 g (7.1 oz.) NOTE: All water purification and filtration systems are different. Please contact the manufacturer of your RO or DI system to determine when you should change your filter cartridges or membranes (based on TDS levels and/or percent rejection).