---
product_id: 50003037
title: "HM Digital ORP-200 Waterproof Professional Series Handheld, White/Green, ORP Meter"
brand: "hm digital"
price: "S$241"
currency: SGD
in_stock: true
url: https://www.desertcart.sg/products/50003037-hm-digital-orp-200-waterproof-professional-series-handheld-white-green
store_origin: SG
region: Singapore
---

# IP-67 Waterproof Auto-ranging Calibration Simultaneous Temp Display HM Digital ORP-200 Waterproof Professional Series Handheld, White/Green, ORP Meter

**Brand:** hm digital
**Price:** S$241
**Availability:** ✅ In Stock

## Summary

> 🌟 Elevate Your Measurements with Confidence!

## Quick Answers

- **What is this?** HM Digital ORP-200 Waterproof Professional Series Handheld, White/Green, ORP Meter by hm digital
- **How much does it cost?** S$241 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/50003037-hm-digital-orp-200-waterproof-professional-series-handheld-white-green)

## 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

- • **Lightweight & Portable:** Weighing only 159g, this handheld meter is perfect for on-the-go professionals.
- • **Precision Meets Durability:** Experience accurate readings with a waterproof design that withstands the elements.
- • **Convenient Storage Solution:** Includes a sponge-embedded cap to keep your meter safe and ready for use.
- • **Smart Calibration Technology:** Enjoy hassle-free auto-ranging calibration with digital fine-tuning for precise measurements.
- • **Temperature Tracking Made Easy:** Monitor oxidation reduction potential and temperature simultaneously for comprehensive analysis.

## Overview

The HM Digital ORP-200 is a professional-grade handheld ORP meter designed for accurate measurement of oxidation reduction potential and temperature. With its waterproof IP-67 rating, auto-ranging calibration, and user-friendly features, this device is perfect for professionals seeking reliable performance in various environments.

## Description

HM Digital ORP-200 Waterproof Professional Series Handheld, White/Green, ORP Meter

## Features

- Measures Oxidation Reduction Potential (Redox) and Temperature
- Auto-ranging calibration with digital fine tuning
- Includes storage solution in a sponge embedded in a clear cap
- Waterproof housing (IP-67 rating)
- Simultaneous temperature display
- The ORP Meter measures oxidation reduction potential (Redox) and temperature
- The ORP-200 meter has an auto-ranging calibration with digital fine tuning
- This Waterproof ORP Meter includes storage solution in a sponge embedded in a clear cap

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | HM Digital, Inc. |
| Part Number | ORP-200 |
| Product Dimensions | 3.3 x 3.3 x 18.54 cm; 158.76 g |
| Batteries | 2 AAA batteries required. (included) |
| Item model number | ORP-200 |
| Size | ORP Meter |
| Colour | White/Green |
| Style | Digital |
| Material | Plastic |
| Voltage | 3 Volts |
| Item Package Quantity | 1 |
| Temperature Range | 0/80 Degrees Celsius |
| Display style | LCD |
| Included Components | Storage Solution, Wrist Strap, Battery |
| Batteries included? | Yes |
| Batteries Required? | Yes |
| Battery description | Alkaline |
| Item Weight | 159 g |

## Product Details

- **Brand:** HM Digital
- **Are batteries included:** Yes
- **Colour:** White/Green
- **Material:** Plastic
- **Sport:** Swimming

## Images

![HM Digital ORP-200 Waterproof Professional Series Handheld, White/Green, ORP Meter - Image 1](https://m.media-amazon.com/images/I/51RYSfrhYrL.jpg)
![HM Digital ORP-200 Waterproof Professional Series Handheld, White/Green, ORP Meter - Image 2](https://m.media-amazon.com/images/I/61ZT8t-Ay5L.jpg)
![HM Digital ORP-200 Waterproof Professional Series Handheld, White/Green, ORP Meter - Image 3](https://m.media-amazon.com/images/I/61yS3nD5fNL.jpg)
![HM Digital ORP-200 Waterproof Professional Series Handheld, White/Green, ORP Meter - Image 4](https://m.media-amazon.com/images/I/71+v2GSBpCL.jpg)
![HM Digital ORP-200 Waterproof Professional Series Handheld, White/Green, ORP Meter - Image 5](https://m.media-amazon.com/images/I/81RVmxpGvxL.jpg)

## Questions & Answers

**Q: Does this meter test for ozone and PH levels?**
A: Dennis,This tester tests for Temperature, ORP and PH (not Ozone).

**Q: Does tester test for ozone and PH levels**
A: This meter does not test for pH or Ozone. I bought a cheap pH meter off Amazon , model ATC, a yellow and black rectangular meter, about $10 with shipping,  for the pH. I haven't done anything with ozone. The ORP meter tests water temperature and ORP. I didn't buy the calibration fluid which I'm going to have to buy. The first reading was -255 and the next reading a couple of days later was about -20. I don't have any way to calibrate it and the reviews say you have to calibrate regularly. Hope this helps.

**Q: The specs on the orp 200 state it will test -999 to +1000 and also that it is factory calibrated to +200. what's the factory calibration of +200 for?**
A: On all ORP meters I have received, over the last 10 years, when you turn it on, the meter will read between 200 and 250.  This is normal.  Keep the ORP probe wet.  Get your self a calibration solution to check and adjust the calibration. This meter comes with a small piece of sand paper.  the meter probe needs to be wet sanded once in a while. If you can smell the Ozone in the water the meter reading should be at least 700 ORP.

**Q: Does the meter have an on & off switch?**
A: FROM HM DIGITAL: Yes, the ORP-200 have an on/off switch and it's located on the front of the unit. In order to properly turn the unit on, you will first want to remove the cap and then press the `ON/OFF' button. The display will become active. For more information, www.tdsmeter.com/products/orp200.html

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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-02-01*