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HM Digital DM-1 In Line Dual TDS Monitor (GT28-6-HM-D)

SKU
GT28-6-HM-D 2xGT10-32LS
In stock
Quick Overview
  • Genuine HM Digital DM-1 Dual TDS Meter
  • Dual TDS Probe For Water Inlet And Outlet Readings
  • Super Precise (98% Accuracy)
  • Factory Calibrated with a 342 ppm NaCl solution.
  • Easy Installation
  • Auto-Off Function (After 10 min.)
  • Perfect for testing Reverse Osmosis Filters and Deionisers for drinking, aquariums & more!
$98.00
4 Interest Free Payments of $24.50

HM Digital DM-1 | Dual Inline Total Dissolved Solids TDS Meter 

The DM-1 is an easy-to-use inline TDS monitor, with electrode probes that allow you to easily compare the input vs. output of your water filtration system. Featuring an advanced microprocessor, this incredibly accurate little device is ideal for testing the performance of Reverse Osmosis (RO) and/or Deionised water (DI) filtration systems, to help you troubleshoot, get the most out of your filters and determine when to change your water filter cartridges or DI Resin. The DM-1 has many applications from testing the efficacy of a drinking water filtration system to testing TDS for aquariums and aquaponics, hydroponics, and spot-free rinsing applications. Stop guessing and be confident that you always have the purest quality 0 ppm TDS water! 

Features, Specs and Performance

  • TDS Range: 0 – 9990 ppm (mg/L)
  • Resolution:
    • From 0-999 in 1 ppm increments;
    • From 1000-9990 in 10 ppm increments (indicated by a ‘x10’ icon)
  • Conversion Factor: 0.5 Scale NaCl (Sodium Chloride)
  • Accuracy: 98% precision (+/- 2% of the true rsult)
  • Conductivity to Total Dissolved Solids (EC-to-TDS) Conversion Factor: 0.5 NaCl (Sodium Chloride)
  • Cable Length + Fittings: 24.5" (including sensor) with standard 1/4" quick connect push fittings
  • Power source: 2 x 1.5V button cell batteries (included) (LR44 or equivalent)
  • Battery life: 1000 hours of usage approx 
  • Weight & Dimensions: 79.4g - 7.6 x 2 x 4.7 cm
  • Meter can also be re-calibrated with a mini-screwdriver.

How to recalibrate a TDS Meter? Use a Total Dissolved Solids (TDS) Calibration Solution!

For optimal calibration results of your HM Digital DM-1 TDS Meter, we recommend periodically recalibrating with HM Digital™ TDS Calibration Solution (342ppm NaCl).

The HM Digital TDS Calibration Solution contains:

  • 342 ppm of NaCl (Sodium Chloride) at 25 degrees celsius
  • 362 ppm at KCL (Potassium Chloride) at 25 degrees celsius
  • 478ppm as "442" at 25 degrees celsius
  • 700µS/cm at 25 degrees celsius

For best results using TDS Calibration Solution:

  • For an accurate result, we recommend that you decant the required amount into a sterile container for calibrating your meter.
  • Only use the required amount needed for calibrating.
  • Discard the used contaminated solution.
  • For optimal performance, re-calibrate your meters periodically, or if testing TDS or conductivity levels in wide or different ranges.
  • All Calibration fluids should be stored in a cool place, out of the heat of the sun.

Can I test for hardness with a TDS Meter?

Sort of, but not really. Hardness is a measure of the amount of dissolved calcium and magnesium within the water. A TDS meter will measure the total dissolved minerals, salts, or metals in the water - but it won't tell you what those dissolved particles are or whether they are actually a cause for concern. To assess your hardness, ask for a report from your local water board (if you draw from a municipal water supply). Otherwise, if you are on bore water, we recommend getting your water analyzed

  • TDS Range: 0 – 9990 ppm (mg/L)
  • Resolution:
    • From 0-999 in 1 ppm increments;
    • From 1000-9990 in 10 ppm increments (indicated by a ‘x10’ icon)
  • Conversion Factor: 0.5 Scale NaCl (Sodium Chloride)
  • Accuracy: 98% precision (+/- 2% of the true rsult)
  • Conductivity to Total Dissolved Solids (EC-to-TDS) Conversion Factor: 0.5 NaCl (Sodium Chloride)
  • Cable Length + Fittings: 24.5" (including sensor) with standard 1/4" push fittings
  • Power source: 2 x 1.5V button cell batteries (included) (LR44 or equivalent)
  • Battery life: 1000 hours of usage approx 
  • Weight & Dimensions: 79.4g - 7.6 x 2 x 4.7 cm

Return Policy

Due to the nature of the products we sell, a strict return policy is in place. We work with food grade certified materials that must be un-opened and un-used as to be able to be re-sold.

You may receive a refund or credit of equal amount, less the restocking fee if applicable and any other deductions that are relevant. 

  • Wrongly purchased items may be returned for a merchandise credit, this applies for but not limited to: Wrong size, wrong system etc.
  • 30 Day return Policy:  Returns will not be accepted without prior approval or after 30 days of invoice date.
  • All returns will incur a 17.5% restocking fee or cost to send the item to you whichever greater. FSA may use discretion to determine the restocking fee.
  • Any damages (minor, that can be repaired) will incur a fee which will be deducted from the total refund which will be equal to the cost of the replacement 
    parts (List Price) and labour charge (if applicable) to repair the system(s). This will be separate to the restocking fee.
  • Any damage considered to be major and not feasible for repair may be refused and the return request will be void. The customer will be responsible for the return freight or disposal of the damaged unit.
  • Return shipping is to be paid by the buyer to the address provided. It is recommended that the customer applies transit warranty to the return freight in case of damage.
  • Any damages to the system that were not reported to FSA within 48 business hours of receipted delivery are not covered under our transit warranty.

 

  • Should the item appear faulty or doesn’t work how described, the unit/item must be returned for testing (if requested), the return postage paid by the buyer. If the unit/item is deemed to be faulty, compensation will be provided for the postage cost (Proof of cost required). If the unit/item is deemed to be in working order and as described, the buyer will responsible for return postage. 

 

If you have any questions about our return policy, please contact us before purchase. This will also help to ensure you purchase the correct product that suits your requirements.


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