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HM Digital

Triple Inline TDS Meter TRM-1

In stock
SKU
200219
$38.24

$44.99
- +

Why does BRS recommend this?

Using a RODI system without a TDS meter is like driving a car without a speedometer and gas gauge.  At some point you will end up in trouble.  With RODI systems it is TDS that you will want to monitor for performance and filter quality.  If you have a single or dual DI stage we highly recommend a triple TDS meter as it will allow you to see your TDS readings in three places.  We will usually suggest installing the triple TDS meter post source water, post membrane and post DI stage. These three readings will notify you when it's time to change the RO membrane and DI resin.

 

The TRM-1 Triple Inline TDS Meter from HM Digital is one of the most essential reverse osmosis accessories. This tool uses electrode probes to monitor the TDS of your reverse osmosis system in three places and lets you know exactly how the system is performing.

 

BulkReefSupply.com suggests: installing the triple TDS meter post source water, post membrane and post DI stage. These three readings will notify you when it's time to change the RO membrane and DI resin. This unit features a digital display and comes with three 1/4" GA Murdock Quick Connect Tee's with double o-rings to ensure a proper seal. As with all HM-Digital products, the TRM-1 comes factory calibrated.

 

TRM-1 TDS Meter Features

  • Advanced microprocessor technology
  • Auto-off function shuts off after 10 minutes of non-use
  • Dual Range 0-9990 ppm (From 0 - 999 ppm the resolution is 1 ppm. From 1000 to 9990 ppm, the resolution is 10 ppm, indicated by a blinking 'x10' image.)
  • Factory Calibrated: calibrated with a 342 ppm NaCl solution.

 

Specifications

  • Range: 0-9990 ppm
  • Accuracy: ±2%
  • Conversion Factor: NaCl (avg. 0.5)
  • Cable Length: 24.5" (including sensor)
  • Power source: 2 x 1.5V button cell batteries (LR44 or equivalent; included)
  • Size: 7.6 x 2 x 4.7 cm (3 x .8 x 1.9 in.)
  • Weight: 79.4 g (2.8 oz.)

 

TDS Meter Installation Instructions

More Information
UPC 891144000243
TDS Meter Type Triple
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Product Questions

Do the three positions on the TDS meter correlate to the 3 connector positions on the unit, going left to right? For some reason, the final output of my BRS unit, as delivered years ago, has the TDS meter connected to the middle connector. Kind of counter intuitive needing to select "2" to see the final output. Just want to confirm this would be correct though.
Question by: Johnny on Jan 30, 2024, 2:48 PM
Hi there! The 3 connector positions SHOULD correlate with the 3 options on the TDS meter; Line 1 should be red and will be on the left, Line 2 should be blue and be in the middle, and Line 3 should be green and be on the right for the product water. Switching the lines is super easy and you can check out how to do it here:

https://www.bulkreefsupply.com/content/post/tds-meter-installation

I hope this helps!
Answer by: Taylor L. (BRS Staff) on Feb 16, 2024, 10:35 AM
I have a triple trm tds monitor on my bra 6 stage to system for two years. Now even after I changed all my filters in my Ro system it is reading crazy numbers. I am wondering if it needs calibration and so how do I calibrate it?
Question by: Anthony farino on Feb 5, 2020, 6:54 PM
Hey there,

There is no calibration needed. Make sure you flush the system really well after changing filters and I would change the batteries as well.

Take care
Answer by: Thomas Billington on Feb 6, 2020, 8:49 AM