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TRM1 HM Digital TDS meter three probes triple
TRM1 HM Digital is a triple TDS meter for monitoring the total dissolved solids in water. It offers a range of 1-9990 ppm (mg/dm3) with Read moreShow less
TRM1 HM Digital is a triple TDS meter for monitoring the total dissolved solids in water. It offers a range of 1-9990 ppm (mg/dm3) with a resolution of 1 ppm up to 999 and 10 ppm above 1000. Three electrodes in John Guest quick-connect tees allow for quick hose attachment, and the line1/line2/line3 switch enables selection of the measurement point. Auto-off after 10 minutes.
Specifications
- Measured parameter
- TDS
- Measurement range
- 1–9990 ppm
- Product type
- Water tester / meter
- Test method
- Electronic meter
Description
TRM1 HM Digital is a triple TDS meter with 3 probes, designed for convenient monitoring of the total amount of dissolved substances in water at three different points in the installation. This practical solution is ideal for applications such as reverse osmosis, RO filters, water filters, reverse osmosis systems, and broadly understood water treatment and water filtration systems. The line1/line2/line3 switch lets you quickly select the measurement location, and after disconnecting the tees, the device can also work as a standard portable meter.

Triple TDS measurement in one housing
The device is used to measure the total amount of all substances dissolved in water. Thanks to three probes, you can monitor water quality at several points at once, which significantly makes it easier to assess the operation of the filtration system and to continuously monitor the effectiveness of treatment.
The reading is carried out in the range 0-9990, and for results greater than 999 ppm the [x10] symbol appears on the display. The device display range is 1-9990 ppm (mg/dm3), which makes the meter suitable both for water after filtration and for monitoring raw water or intermediate stages of the circuit.
Key features and benefits
- triple TDS measurement at three points in the installation thanks to three electrode probes,
- line1/line2/line3 switch for convenient selection of the active measurement point,
- automatic shut-off after 10 minutes of inactivity to save battery power,
- electrodes placed in tees with John Guest quick connectors, allowing water hoses to be connected instantly without additional sealing,
- quick installation and removal using two self-adhesive hook-and-loop strips,
- the ability to use the TRM1 as a standard portable meter after disconnecting the tees,
- factory calibration and the option of manual calibration with a mini screwdriver.
Convenient installation in the filtration system
The TRM1 HM Digital was designed for quick and trouble-free installation. The electrodes are located in tees with John Guest quick connectors, which allows water hoses to be connected efficiently without using additional seals. This solution is especially convenient where a reverse osmosis filter, reverse osmosis system, or another water filter requiring parameter monitoring at several points is in use.

The meter itself is mounted on two self-adhesive hook-and-loop strips. This solution simplifies both the initial installation and later removal, for example during servicing, cleaning, or when changing the system configuration.
After disconnecting the tees, the TRM1 can be used as a standard portable meter. This is a practical feature if you also want to take measurements outside the fixed installation.
Reading accuracy and everyday use
The meter offers a measurement tolerance of +/- 2% and operates with a resolution of 1 ppm for the range from 0 to 999 and 10 ppm for the range from 1000 to 9990. This characteristic makes it easier to interpret results quickly and conveniently monitor changes in water quality over time.
The device is ready to use right out of the box because it has been factory calibrated. Manual calibration using a mini screwdriver is also available if needed. The average battery life is 1000 hours of operation, and the auto-off function after 10 minutes of inactivity further reduces power consumption.

Application
The triple TDS meter works wherever quick water quality control at several sections of the installation is important. It is a particularly useful solution for users of treatment systems, domestic filtration systems, and setups based on reverse osmosis.
- water control before and after filtration,
- monitoring the operation of the water filtration system,
- evaluating the efficiency of cartridges and membranes in osmosis installations,
- checking parameters in several lines at once,
- stationary or portable measurement, depending on your needs.
Dimensions
- 7.6 cm
- 2 cm
- 4.7 cm
Kit contents
- TRM1 triple TDS Meter with line1/line2/line3 switch,
- two installed 1.5V LR44 batteries,
- three electrodes on 62 cm cables,
- three tees with Murdock quick connectors,
- instruction manual,
- foil packaging.
Additional important information
- 7.6 CM
- 2 CM
- 4.7 CM

Technical specifications
| Cable length | 62 cm (including electrodes) |
|---|---|
| Reading range | 1 - 9990 ppm (mg/dm3) |
| Display reading | 0 - 9990; for results greater than 999 ppm the [x10] symbol appears |
| Measurement tolerance | +/- 2% |
| Calibration | Factory calibrated, manual calibration possible with a mini screwdriver |
| Resolution from 0 to 999 | 1 ppm |
| Resolution from 1000 to 9990 | 10 ppm |
| Auto-off function | 10 minutes |
| Average battery life | 1000 hours of operation |
| Weight | 79.4 g |
| Power supply | 2 LR44 1.5V batteries |
Questions
What is the HM Digital TRM1 TDS meter used for?
The device is used to measure the total amount of substances dissolved in water. Thanks to three probes, it allows you to monitor water parameters at three points in the installation.
What range does the TRM1 measure in?
The meter operates in the reading range of 1-9990 ppm (mg/dm3). The display reading covers 0-9990, and for values greater than 999 ppm the [x10] symbol appears.
How are the measuring points switched?
The line1/line2/line3 switch is used to select the measurement point. It allows you to quickly check the reading from one of the three connected lines.
Does installation require additional sealing?
No. The electrodes are placed in tees with John Guest quick connectors, to which water hoses can be connected instantly without the need for additional sealing.
Can the meter be used as a portable model?
Yes. After disconnecting the tees, the TRM1 can be used as a standard portable meter, which increases its versatility.
Is the device calibrated?
Yes, the meter is ready to use and factory calibrated. In addition, manual calibration with a mini screwdriver is available.
What is the power supply and battery life?
The device is powered by two LR44 1.5V batteries. The average battery life is 1000 hours of operation, and the auto-off function after 10 minutes of inactivity helps save energy.
What are the dimensions and weight of the meter?
The device dimensions are 7.6 cm, 2 cm, and 4.7 cm, and its weight is 79.4 g.
Świetnie doradzono
Polecam
wybitne
solidny sprzęt, polecam
genialne
wygodny w użyciu, polecam każdemu
elegancko
trzy sondy to duża zaleta, świetny miernik.
Profesjonalny produkt
Pomiary doskonałe wszystko pracuję jak powinno. Produkt godny polecenia.
Genialny
Długi czas pracy urządzenia i pomiary doskonałe. Naprawdę warto jeśli dużo pracuje się w tej branży.