---
product_id: 3311328
title: "HM Digital PH-200 Waterproof pH Meter, 0-14.00 pH Range, 0.01 pH Resolution, +/- 0.02 pH Readout Accuracy"
brand: "hm digital"
price: "VT26534"
currency: VUV
in_stock: true
reviews_count: 7
category: "Hm Digital"
url: https://www.desertcart.vu/products/3311328-hm-digital-ph-200-waterproof-ph-meter-0-14-00
store_origin: VU
region: Vanuatu
---

# IP67 Waterproof housing 1000 hrs battery life ±0.02 pH accuracy HM Digital PH-200 Waterproof pH Meter, 0-14.00 pH Range, 0.01 pH Resolution, +/- 0.02 pH Readout Accuracy

**Brand:** hm digital
**Price:** VT26534
**Availability:** ✅ In Stock

## Summary

> 💧 Take control of your water chemistry like a pro — precision meets durability in one sleek meter!

## Quick Answers

- **What is this?** HM Digital PH-200 Waterproof pH Meter, 0-14.00 pH Range, 0.01 pH Resolution, +/- 0.02 pH Readout Accuracy by hm digital
- **How much does it cost?** VT26534 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/3311328-hm-digital-ph-200-waterproof-ph-meter-0-14-00)

## 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

- • **Compact & Ready to Go:** Lightweight, pen-sized form factor with included storage solution for sensor longevity—perfect for on-the-move professionals.
- • **Effortless Calibration:** Auto-ranging 3-point calibration with digital fine-tuning keeps your readings razor-sharp with minimal hassle.
- • **Smart Power Management:** Auto-off and low-battery indicator extend battery life up to 1000 hours, so you’re never caught off guard.
- • **Built to Brave the Elements:** IP67-rated waterproof design means no fear of spills or splashes during critical testing.
- • **Precision at Your Fingertips:** Ultra-accurate ±0.02 pH readout ensures lab-grade confidence in every measurement.

## Overview

The HM Digital PH-200 is a professional-grade, waterproof pH meter offering a full 0-14 pH range with ±0.02 accuracy and 0.01 resolution. Designed for diverse applications from hydroponics to water treatment, it features auto-ranging three-point calibration, a durable IP67 waterproof housing, and smart power-saving functions. Compact and easy to maintain, it empowers users to achieve precise, reliable pH readings anytime, anywhere.

## Description

Product Description: HM Digital's PH-200 is a digital waterproof pH meter (aka pH tester or pH pen) that is ideal for all pH testing, water purification applications, wastewater regulation, aquaculture, hydroponics, colloidal silver, labs & scientific testing, pools & spas, ecology testing, boilers & cooling towers, water treatment, wine, coffee, agriculture and more. It is fast-acting, features amazing results and perfect for the hobbyist to the laboratory professional.

Review: This thing's da bomb - FWIW, I'm writing the review from the POV of a spa user. You can use this tester for your pool, salt water aquarium or your hydroponic planter. My supposition is, you're looking at this item because you have needs above and beyond test kits or simple test strips. With this pH meter (potential of hydrogen), you'll be able to quickly tell what your water's pH is. HM also has a total dissolved solid (TDS) meter, the COM-100, which I've had for about a week and absolutely love. The unit is waterproof, light weight, a bit smaller than the size of a small "C" cell flashlight or about the size of a large cigar. It's easy to use, easy to maintain, has a small form factor for storage purposes and once calibrated, I feel it's an accurate piece of test equipment that gives you the feeling of having control over your spa tub water chemistry. The unit comes from the distributor pre-calibrated. Batteries are included. A cautionary warning note, the sensor periodically needs to be replaced. The replacement sensor number is: SP-P2. Replacement is a simple process of remove, replace and calibrate. Delivered, the sensor runs about $45.00. Knowing the pH of your water is an important aspect of monitoring spa water chemistry. Without a pH meter of this kind, one won't have a dependable clue what their pH level is. Using test strips or a test kit, my experience, readings can easily be off by up to 1.1 pH. Having your pH out of whack can cause you to have the condition of your water being too acidic, which can damage your heater element as well as low pH can be hard on eyes and skin. If the water is too base, you'll have to deal with calcification/scaling/cloudy water problems which is hard on the tub, jets and plain yucky to get in. The alternative to this meter, test strips or test kits is having to take the time and regularly drop in to your local pool/spa supply house with water sample in hand, where they're going want you to spend more money. And I hate spending money on chemicals I might not need. This all so I feel good about getting my water tested for free. With this tester, that's no longer an issue. And If you're a bit geeky, enjoy the feel of accurate test data and like the peace of mind created knowing you have control over your water's chemistry, after using this tester a few times, you'll feel confident that you're finally in control of your water's pH reading. Yes, in my opinion, the PH-200 is a bit expensive but if you have the extra green, for the peace of mind and control over your water chemistry this tester gives you, you'll quickly come to the same conclusion I came to; money well spent. Why? Because this tester is da bomb. Note 1. Be sure to buy some calibration solution so you know your reading is accurate due to proper calibration. Calibration is simple. Holding the middle button in for a few seconds puts the unit in calibration mode. Place the meter in the calibration fluid and then fine tune the reading displayed in the LCD using the up/down arrows. In this case, for spa water, I use 7.0 pH calibration fluid. You want to use a calibration fluid that's close to your expected needs: 4.00, 7.00 or 10.00 pH. In the case of this tester, calibration is no more difficult than using a television remote control. Note 2. desertcart has calibration packets for sale and with distilled water from the grocery store, you can mix up your own calibration fluid. FYI, you will need to have something like a 100ml graduated cylinder on hand to accurately measure the amount of distilled water you'll need when you mix up a batch of calibration fluid. Also needed, is some "electrode storage solution" to keep the sensor bulb wet. No big deal to use. Put a half dozen drops of fluid in the protective cap that covers the sensor, place the cap on the tester like a pen and you're good as long as the tester is stored standing upright to keep the fluid inside the cap. This is a very sensitive measuring device. This extra effort is not as big of a deal as I make it out to be. Once you do the first time, you're good. And if you care about decent testing gear, you won't mind this bit of extra effort and you'll be glad you got one of these pH testers. Hope the above helps.
Review: Great Meter! - WARNING: Common Sense Required! - I assume that most of the folks who have broken this quality probe or complained about how fragile it is have never used a quality/accurate PH meter before. The nature of the beast requires that the sensor be made the way this one is, and also that it remain wet with a storage solution at ALL TIMES! There is no gray area here folks! If you fail to rinse the end of the probe off with a spray bottle of distilled water after each use and then store it in the special reservoir cap with the sponge to hold the storage fluid up against the glass/gel sensor, YOU ARE ASKING FOR TROUBLE! The original unit I bought (Not from desertcart) arrived dry as a bone with the storage solution evaporated. I returned it for a refund and purchased the meter from another dealer who took better care of his stock. If your meter arrives dried out, I would suggest doing the same thing. Although the sensor can sometimes be rehydrated, I would be dubious as to the accuracy and prefer to get a replacement that was stored properly and/or didn't sit on a dealer's shelf for an eternity. In terms of the fragility of the glass sensor itself... The sensor end of the probe has a three sided housing that is designed to extend out beyond the actual glass sensor bead and shield it from impact from the sides, but obviously, if you manhandle the thing like a Gorilla and carelessly dunk it into a glass beaker or other container, there is a good chance that you are going to bring the sensor bead straight down onto the rim of the container or something and crack or shatter the sensor! DUH!! This thing is definitely not IDIOT PROOF, so idiots should probably look for something else or have someone with better hand/eye coordination do their testing for them! I purchased my original PH-200 well over two years ago and use it several times a day in my hydroponic garden. NEVER broke a sensor, never had one dry out, never had a problem with calibration, never had a problem with the device in any way! I like this brand and this model so much, I just bought another one here on desertcart because my original is getting close to needing a sensor replacement, and I had a gift card here and figured it would make sense to just buy an entire new unit for now and a new sensor for the original later! The auto calibration is GREAT! Buy yourself some calibration reference solution of 4.0 and 7.0 PH and READ THE INSTRUCTIONS ON THE LABEL ON HOW TO CALIBRATE the device. Unlike other meters in this general price range, there is no calibration screw to turn, no hassles at all! Just hold the CALIBRATE button down while the probe is immersed in the "quality" reference solution of your choice, and wait till the display reads "END". Takes about 5 seconds from start to finish after letting the sensor sit in the reference solution for a FULL MINUTE before hitting the button! DON'T DO WHAT MOST OF THE 1 AND 2 STAR REVIEWERS HERE DID AND CONTAMINATE THE CALIBRATION REFERENCE SOLUTION, AND THEN WHINE ABOUT THE UNIT FAILING TO CALIBRATE PROPERLY! Some lab guys calibrate before every test, and with this model, it is so easy to do, it really can be done in less than 5 seconds by pushing a button and waiting for the probe to self calibrate to the solution it is sitting in. It uses its PH measuring ability to identify the PH of the base solution you are using and calibrate accordingly. (7.0 or 4.0) In terms of accuracy... Like one of the other owners said... This thing is almost as accurate as the $1500.00+ lab grade PH meters, which is definitely saying something! So... Like anything, the device is only as good as the person using it and most of the low review scores are testament to how NOT TO USE THIS DEVICE! If you treat your equipment like crap and don't like reading owners manuals then this probe is probably not for you. If on the other hand, you are looking for an excellent WATER PROOF probe made by a company well respected in the laboratory equipment industry, a model that is considered by those who should know to be one of the best PH probes you can buy, then look no further than the PH-200. And when your unit arrives... READ the manual, and use some COMMON SENSE in handling it and it should give you years of trouble free service! I would give this thing 10 stars if I could, it is that good!

## Features

- plastic
- Imported
- Measures pH and Temperature, Range: 0-14 pH, 0-80 °C, 32-176 °F
- Autoranging three point calibration with digital fine tuning
- Waterproof housing (IP-67 rating)
- Includes storage solution in a sponge embedded in a clear cap
- Auto-off function, data-hold function and low-battery indicator

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00132G102 |
| Average Battery Life | 1000 Hours |
| Batteries | 2 AAA batteries required. |
| Batteries Included? | No |
| Batteries Required? | No |
| Battery Cell Type | Alkaline |
| Battery Description | Alkaline |
| Best Sellers Rank | #160,517 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #157 in Lab pH Meters |
| Brand | HM Digital |
| Color | White |
| Customer Reviews | 4.2 4.2 out of 5 stars (400) |
| Date First Available | January 24, 2008 |
| Description Pile | Alkaline |
| Global Trade Identification Number | 00891144000021 |
| Included Components | 1 EA Meter |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 6.2 ounces |
| Item model number | PH-200 |
| Manufacturer | Hydrofarm |
| Material | Plastic |
| Measurement Accuracy | +/- 0.1 |
| Mounting Type | Tabletop |
| Number Of Pieces | 1 |
| Part Number | PH-200 |
| Pattern | Meter |
| Product Dimensions | 3"W x 8"H |
| Shape | Rectangular |
| Size | 3.3" x 8.5" x 2" |
| Temperature Reading Accuracy | plus_minus_1_degree_celsius |
| UPC | 798527557687 891144000021 095225177538 |
| Upper Temperature Rating | 176 Degrees Fahrenheit |
| Warranty Description | Limited |

## Product Details

- **Battery Description:** Alkaline
- **Brand:** HM Digital
- **Color:** White
- **Item Weight:** 0.39 Pounds
- **Product Dimensions:** 3"W x 8"H

## Images

![HM Digital PH-200 Waterproof pH Meter, 0-14.00 pH Range, 0.01 pH Resolution, +/- 0.02 pH Readout Accuracy - Image 1](https://m.media-amazon.com/images/I/51OdvTH9a2L.jpg)

## Questions & Answers

**Q: Which storage solution is best to use for this product? Also how often do you have to change storage fluid?**
A: There is hm ph electrode storage solution you can get...there is a sponge in the cap of this ph meter that you dont want to let dry out.

**Q: is this meter pre calibrated out of the box?**
A: Yes.....any bottled water that has been treated with the Reverse Osmosis (RO) has a PH of 7 .......Read the Label for (RO).....so it's an easy and cheap check.......

**Q: What is the operational temperature range ?**
A: I use it for adjusting brewing water, so the range I've use it is from 45F to 165F.

**Q: Is this meter appropriate fow wine?**
A: I've  been using it for beer pH measurement so wine should be fine.

## Customer Reviews

### ⭐⭐⭐⭐⭐ This thing's da bomb
*by B***8 on September 5, 2011*

FWIW, I'm writing the review from the POV of a spa user. You can use this tester for your pool, salt water aquarium or your hydroponic planter. My supposition is, you're looking at this item because you have needs above and beyond test kits or simple test strips. With this pH meter (potential of hydrogen), you'll be able to quickly tell what your water's pH is. HM also has a total dissolved solid (TDS) meter, the COM-100, which I've had for about a week and absolutely love. The unit is waterproof, light weight, a bit smaller than the size of a small "C" cell flashlight or about the size of a large cigar. It's easy to use, easy to maintain, has a small form factor for storage purposes and once calibrated, I feel it's an accurate piece of test equipment that gives you the feeling of having control over your spa tub water chemistry. The unit comes from the distributor pre-calibrated. Batteries are included. A cautionary warning note, the sensor periodically needs to be replaced. The replacement sensor number is: SP-P2. Replacement is a simple process of remove, replace and calibrate. Delivered, the sensor runs about $45.00. Knowing the pH of your water is an important aspect of monitoring spa water chemistry. Without a pH meter of this kind, one won't have a dependable clue what their pH level is. Using test strips or a test kit, my experience, readings can easily be off by up to 1.1 pH. Having your pH out of whack can cause you to have the condition of your water being too acidic, which can damage your heater element as well as low pH can be hard on eyes and skin. If the water is too base, you'll have to deal with calcification/scaling/cloudy water problems which is hard on the tub, jets and plain yucky to get in. The alternative to this meter, test strips or test kits is having to take the time and regularly drop in to your local pool/spa supply house with water sample in hand, where they're going want you to spend more money. And I hate spending money on chemicals I might not need. This all so I feel good about getting my water tested for free. With this tester, that's no longer an issue. And If you're a bit geeky, enjoy the feel of accurate test data and like the peace of mind created knowing you have control over your water's chemistry, after using this tester a few times, you'll feel confident that you're finally in control of your water's pH reading. Yes, in my opinion, the PH-200 is a bit expensive but if you have the extra green, for the peace of mind and control over your water chemistry this tester gives you, you'll quickly come to the same conclusion I came to; money well spent. Why? Because this tester is da bomb. Note 1. Be sure to buy some calibration solution so you know your reading is accurate due to proper calibration. Calibration is simple. Holding the middle button in for a few seconds puts the unit in calibration mode. Place the meter in the calibration fluid and then fine tune the reading displayed in the LCD using the up/down arrows. In this case, for spa water, I use 7.0 pH calibration fluid. You want to use a calibration fluid that's close to your expected needs: 4.00, 7.00 or 10.00 pH. In the case of this tester, calibration is no more difficult than using a television remote control. Note 2. Amazon has calibration packets for sale and with distilled water from the grocery store, you can mix up your own calibration fluid. FYI, you will need to have something like a 100ml graduated cylinder on hand to accurately measure the amount of distilled water you'll need when you mix up a batch of calibration fluid. Also needed, is some "electrode storage solution" to keep the sensor bulb wet. No big deal to use. Put a half dozen drops of fluid in the protective cap that covers the sensor, place the cap on the tester like a pen and you're good as long as the tester is stored standing upright to keep the fluid inside the cap. This is a very sensitive measuring device. This extra effort is not as big of a deal as I make it out to be. Once you do the first time, you're good. And if you care about decent testing gear, you won't mind this bit of extra effort and you'll be glad you got one of these pH testers. Hope the above helps.

### ⭐⭐⭐⭐⭐ Great Meter! - WARNING: Common Sense Required!
*by T***T on June 28, 2011*

I assume that most of the folks who have broken this quality probe or complained about how fragile it is have never used a quality/accurate PH meter before. The nature of the beast requires that the sensor be made the way this one is, and also that it remain wet with a storage solution at ALL TIMES! There is no gray area here folks! If you fail to rinse the end of the probe off with a spray bottle of distilled water after each use and then store it in the special reservoir cap with the sponge to hold the storage fluid up against the glass/gel sensor, YOU ARE ASKING FOR TROUBLE! The original unit I bought (Not from Amazon) arrived dry as a bone with the storage solution evaporated. I returned it for a refund and purchased the meter from another dealer who took better care of his stock. If your meter arrives dried out, I would suggest doing the same thing. Although the sensor can sometimes be rehydrated, I would be dubious as to the accuracy and prefer to get a replacement that was stored properly and/or didn't sit on a dealer's shelf for an eternity. In terms of the fragility of the glass sensor itself... The sensor end of the probe has a three sided housing that is designed to extend out beyond the actual glass sensor bead and shield it from impact from the sides, but obviously, if you manhandle the thing like a Gorilla and carelessly dunk it into a glass beaker or other container, there is a good chance that you are going to bring the sensor bead straight down onto the rim of the container or something and crack or shatter the sensor! DUH!! This thing is definitely not IDIOT PROOF, so idiots should probably look for something else or have someone with better hand/eye coordination do their testing for them! I purchased my original PH-200 well over two years ago and use it several times a day in my hydroponic garden. NEVER broke a sensor, never had one dry out, never had a problem with calibration, never had a problem with the device in any way! I like this brand and this model so much, I just bought another one here on Amazon because my original is getting close to needing a sensor replacement, and I had a gift card here and figured it would make sense to just buy an entire new unit for now and a new sensor for the original later! The auto calibration is GREAT! Buy yourself some calibration reference solution of 4.0 and 7.0 PH and READ THE INSTRUCTIONS ON THE LABEL ON HOW TO CALIBRATE the device. Unlike other meters in this general price range, there is no calibration screw to turn, no hassles at all! Just hold the CALIBRATE button down while the probe is immersed in the "quality" reference solution of your choice, and wait till the display reads "END". Takes about 5 seconds from start to finish after letting the sensor sit in the reference solution for a FULL MINUTE before hitting the button! DON'T DO WHAT MOST OF THE 1 AND 2 STAR REVIEWERS HERE DID AND CONTAMINATE THE CALIBRATION REFERENCE SOLUTION, AND THEN WHINE ABOUT THE UNIT FAILING TO CALIBRATE PROPERLY! Some lab guys calibrate before every test, and with this model, it is so easy to do, it really can be done in less than 5 seconds by pushing a button and waiting for the probe to self calibrate to the solution it is sitting in. It uses its PH measuring ability to identify the PH of the base solution you are using and calibrate accordingly. (7.0 or 4.0) In terms of accuracy... Like one of the other owners said... This thing is almost as accurate as the $1500.00+ lab grade PH meters, which is definitely saying something! So... Like anything, the device is only as good as the person using it and most of the low review scores are testament to how NOT TO USE THIS DEVICE! If you treat your equipment like crap and don't like reading owners manuals then this probe is probably not for you. If on the other hand, you are looking for an excellent WATER PROOF probe made by a company well respected in the laboratory equipment industry, a model that is considered by those who should know to be one of the best PH probes you can buy, then look no further than the PH-200. And when your unit arrives... READ the manual, and use some COMMON SENSE in handling it and it should give you years of trouble free service! I would give this thing 10 stars if I could, it is that good!

### ⭐⭐⭐⭐⭐ Review
*by J***Y on August 23, 2013*

1.) Ultra fast shipping-------A+ 2.) Great customer service, I had to call Hydrofarm because the sensor was dry when I received it. Their response was that the meter will be fine if kept hydrated after first use.------------------A+ 3.) Calibrating with buffer solution is as easy as pie! The instructions clearly indicate how to do this. Follow them closely!-------A+ 4.) The reading will vary a little while you are taking a measurement, but that is perfectly normal. I use this for brewing, and upon having an exact reading of where our PH is has improved the taste of our beer. There is another reviewer that said commonsense is essential when using this tool, I couldn't agree more!! Keep sensor moist at all times, and store in upright position. Use buffer solutions to calibrate often........simple.

## Frequently Bought Together

- HM Digital PH-200 Waterproof pH Meter, 0-14.00 pH Range, 0.01 pH Resolution, +/- 0.02 pH Readout Accuracy
- HM Digital PH-STOR pH Electrode Storage Solution for Use with PH-200 or PH-80, 60cc Volume
- Apera Instruments AI1113 pH Calibration Buffer Solution Kit (7.00, 4.00), 8 oz. Each

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*Product available on Desertcart Vanuatu*
*Store origin: VU*
*Last updated: 2026-01-24*