Unfortunately, as of February 2026, PM-1 and PM-2 are currently out of stock. These products are only available for OEM orders (100 units or more). While there may occasionally be leftover stock after OEM orders, there are currently none, and there are no plans to produce them. We apologize for the limitation and appreciate your understanding.

Buy HM Digital PM-2 OEM TDS Monitor with Housing at the best price

List Price: ~~$74.95~~
$74.27 / Kit
You Save: 0.91%
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There is a $100.00 minimum order required when purchasing "HM Digital" products

List Price: ~~$74.95~~
$74.27 / Kit
You Save: 0.91%
Free Shipping

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Description

The PM-2 is an ideal monitor/alert for water coolers and other enclosed water purification systems. It alerts the user when the filtration system requires service.

Features:

External single-line internal TDS monitor that is ideal for most water purification systems
Includes a light and optional alarm that alerts the user service is required when the TDS level reaches the pre-programmed set-point
User-defined set points (any even number between 2 and 200)

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WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov

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Technical details

Range	0-200 ppm (mg/L)
Accuracy	+/- 2%
Calibration	Factory calibrated
Alert	Warning light, optional alarm
Light color	Either red or yellow
Light function	Either flashes or is steady
Alarm	Beeps for 20 seconds, then goes silent
Power Source	AC 110V / 220V +/- 2%
Cable Length	62.86 cm (24.75")
Fittings	1/4" standard, also available with 3/8" or 1/2"
Max. Water Pressure	200 PSIG (at 23°C with a 1/4" fitting)
Dimensions	12.9 x 7.3 x 6 cm (5 x 2.9 x 2.4 in.)
Weight	340 g (12 oz.)

Questions & AnswersHave a Product Question?

Popular Questions

Created on: Feb 17, 2026, 1:27 PM by Andrei K.
Stock Inquiry
Are these kept in stock?
Answer
- Created on: Feb 17, 2026, 1:29 PM by Admin
  Unfortunately, as of February 2026, PM-1 and PM-2 are currently out of stock. These products are only available for OEM orders (100 units or more). While there may occasionally be leftover stock after OEM orders, there are currently none, and there are no plans to produce them. We apologize for the limitation and appreciate your understanding.
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