---
product_id: 728074927
title: "Hydrofarm HMDCOM100 Waterproof EC-TDS & Temperature Combometer"
brand: "hm digital"
price: "฿720428"
currency: THB
in_stock: true
reviews_count: 5
category: "Hm Digital"
url: https://www.desertcart.co.th/products/728074927-hydrofarm-hmdcom100-waterproof-ec-tds-and-temperature-combometer
store_origin: TH
region: Thailand
---

# 0-9990μS EC range Auto-off & low battery indicator 0-80°C temp range Hydrofarm HMDCOM100 Waterproof EC-TDS & Temperature Combometer

**Brand:** hm digital
**Price:** ฿720428
**Availability:** ✅ In Stock

## Summary

> 💧 Dive into precision—never miss a drop of data!

## Quick Answers

- **What is this?** Hydrofarm HMDCOM100 Waterproof EC-TDS & Temperature Combometer by hm digital
- **How much does it cost?** ฿720428 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/728074927-hydrofarm-hmdcom100-waterproof-ec-tds-and-temperature-combometer)

## Best For

- hm digital enthusiasts

## Why This Product

- Trusted hm digital brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Smart Sensor Tech:** Removable platinum electrode and 3 non-linear EC-to-TDS conversion coefficients adapt to diverse water types.
- • **User-Friendly & Efficient:** Auto-off feature and data retention maximize battery life and convenience during fieldwork or lab tests.
- • **Wide Application Spectrum:** Perfect for hydroponics, ecology, pool maintenance, labs, and industrial water regulation—stay ahead in every environment.
- • **Built to Brave the Elements:** IP67 waterproof housing ensures durability—even if you drop it in water, it keeps working flawlessly.
- • **Precision Meets Versatility:** Accurately measures EC, TDS, and temperature with ±2% accuracy for reliable water quality insights.

## Overview

The Hydrofarm HMDCOM100 Waterproof EC-TDS & Temperature Combometer is a professional-grade, battery-powered water quality tester featuring a broad EC range (0-9990μS), temperature measurement up to 80°C, and advanced non-linear EC-to-TDS conversion. Its rugged IP67 waterproof design, removable platinum electrode, and smart auto-off function make it ideal for hydroponics, scientific labs, environmental monitoring, and industrial water management.

## Description

EC/TDS/Temporary Staff Combo-Meter Tester for Testing Water Quality μS mS ppm ppt Measurement Waste Regulation, Culture, Hydroponics, Colloidal Silver, Lab & Scientific Tests, Pool & Mines, Ecology Tests, Boiler & Cooling Towers, Water Handling, and More Good Functions 3. Non-linear EC-to-TDS Conversion Factor (KCl, 442TM, Sodium Chloride) Automatic Temperature Compensation (ATC) Waterproof housing Auto-off feature replaceable sensors Data retention function and low battery indicator included cap and lanyard: Batteries not included for safe delivery. Specifications EC Range: 0 - 9990 μS; 0 - 9.99ms TDS Range: 0 - 8560 ppm (mg/L); 0 - 8.56 ppt Temperature range: 0-80 °C; 32-176 °F Resolution: 0-99: 0.1 μS/ppm/ppt; 100-999: 1 μS/ppm; 1000-9990: 10 μS/ppm Temp. Resolution: 0.1°C/F Accuracy: +/-2% EC to TDS conversion coefficient: KCl, 442TM or sodium chloride solutions. Non-linear conversion for scale: digital scale Process: Separable platinum electrode Household: IP-67 waterproof clothing Power Supply: 2 x 1.5V AAA alkaline batteries (not included) Dimension: 7.3x1.3x1.3x1.3 inches

Review: Great meter. Near instant readings, accurate, easy to calibrate and best of all, waterproof. I’ve accidentally dropped the whole meter into water, completely submerged for a few seconds with no problems.
Review: تجربتي معه جيدة

## Features

- Measures electrical conductivity (EC), total dissolved solids (TDS), temperature
- EC TDS measurement range: 0-9990μS; 0-5000ppm (0.5 scale); 0-8560ppm (0.7scale)
- Head protruding forward? Removable white gold electrode; replaces sensor
- Three non-linear EC-to -TDS conversion coefficient (KCl, 442TM, Sodium Chloride)
- Applications: waste water regulation, culture, hydroponics, colloidal silver, lab & scientific tests, pool & miners, ecology tests, boilers & cooling towers, water handling, and more

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0045LQFTK |
| Amazon Bestseller | #79,422 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #942 in Voltage Testers |
| Batteries | 2 AAA batteries required. |
| Batteries Included | No |
| Batteries Required? | Yes |
| Customer Reviews | 4.4 4.4 out of 5 stars (163) |
| Date First Available | August 7, 2012 |
| Is Discontinued By Manufacturer | No |
| Item Dimensions LxWxH | 22.6 x 7.4 x 5.3 cm |
| Item Weight | 120 g |
| Manufacturer | HM ELECTRONICS |
| Number Of Pieces | 1 |
| Part number | COM-100 |
| Power source type | Battery Powered |
| Product Dimensions | 22.61 x 7.37 x 5.33 cm; 120 g |
| Special Features | Non-Contact |
| Voltage | 3 Volts |

## Product Details

- **Age Range (Description):** Adult
- **Brand:** HM Digital
- **Global Trade Identification Number:** 00891144000007
- **Number of Batteries:** 2 AAA batteries required.
- **Outer Material:** Plastic
- **Power Source:** Battery Powered
- **Response Time:** 0.5 seconds
- **Special Feature:** Non-Contact
- **UPC:** 095225177507 891144000007
- **Unit Count:** 1.0 Count

## Images

![Hydrofarm HMDCOM100 Waterproof EC-TDS & Temperature Combometer - Image 1](https://m.media-amazon.com/images/I/51hfD5nFZmL.jpg)

## Questions & Answers

**Q: Can this unit be used to test PH?**
A: FROM HM DIGITAL: The COM-100 is NOT a pH meter. It measures EC (electrical conductivity), TDS (total dissolved solids) and temperature. For pH, please purchase HM Digital's PH-200. For more information, please visit www.tdsmeter.com

**Q: My meter want read over 999 or am I looking at the wrong ppm?**
A: Select 442 scale. Your meter will read more than 999 ppm.

**Q: Any trouble measuring in mS?**
A: FROM HM-DIGITAL: The COM-100 is a professional waterproof EC/TDS meter that has three EC-TDS conversion factors and selectable modes allowing you to measure in the µs, mS, ppm and ppt scales. For more information, please visit, www.tdsmeter.com/products/com100.html

**Q: Isn't one supposed to use calibrating and cleaning solution with this?**
A: I clean mine with a wet Q-tip. There is a TDS calibration solution I use when I recalibrate every month.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by B***M on June 21, 2025*

Great meter. Near instant readings, accurate, easy to calibrate and best of all, waterproof. I’ve accidentally dropped the whole meter into water, completely submerged for a few seconds with no problems.

### ⭐⭐⭐⭐ Review
*by J***I on March 15, 2024*

تجربتي معه جيدة

### ⭐⭐⭐⭐⭐ Review
*by S***L on March 24, 2020*

Great product for checking water quality.

## Frequently Bought Together

- HM Digital HMDCOM100 Waterproof EC/TDS And Amp Temperature Combo Meter
- HM Digital C342 TDS and EC Calibration Solution, 342 ppm (NaCl), 90 ml Volume, Transparent/Blue
- HM Digital 1000ppm TDS Calibration Solution

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-03-10*