We are offical factory distributors of HM Digital products, buy the real product with confidence.
 
In-line Double TDS Monitor
The DM-1 is a commercial-grade TDS monitor measuring two TDS feeds of a 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.
 
Features:
Highly efficient and accurate due to its advanced microprocessor technology
Displays TDS levels from two seperate (supplied) sensors with 'in' & 'out' electrode probes
Auto-Off function conserves battery power (Shuts off automatically after 10 minutes)
Factory Calibrated: our meters are calibrated with a 342 ppm NaCl solution.
Diagnostic error messaging
Comes equipped with two 1/4 inch T-fittings
 
Specification:
TDS Range: 0 to 9000ppm
Resolution: 1ppm at 100 to 999 range.
Resolution: 10ppm at 1000 to 5000 range
Accuracy: ±2%
Conversion Factor: NaCl (avg. 0.5)
Cable Length: 0.6m /2.0ft, 
Sensor: Dual, 1/4″ diameter for quick-connect fittings (model SP-3, included)
Calibration: Analog
Power Source: 2 x AA batteries (included)
Size: 7.6 x 2.0 x 4.7cm (3.0 x 0.8 x 1.9 in)
Weight: 79g (2.8oz.)
 
TDS measurement is a key indicator of filtration performance, this device can be utilised in a number of ways, for example:
Probe 1: RO Membrane Output, Probe 2: Mineralisation cartridge measuring
Probe 1: RO Membrane Output, Probe 2: DI Resin Output
Probe 1: RO Unit 1 Membrane Output, RO Unit 2 Membrane Output
etc. etc.
 
Contact us if you have any questions, we are happy to help and provide installation advice etc.