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by Oakton

Oakton pHTestr pH Tester

Available in multiple versions

15 customer reviews

Price: $93.80 - $281.43
Product Specifications
Brand Name Oakton
Measurement Type pH , Temperature
UNSPSC Code 41115603

The Oakton 35634 pH Testr 10 is a handheld, waterproof and dustproof meter that floats, if droppe... Read full product description



pH Testers

pH Testers
View our selection of pH Testers, including pH Test Strips and pH Meters.
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10 pH Tester B004G8PX5O
$95.95
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20 pH Tester B004G8PX6I
$136.82
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30 pH Tester B004G8PX72
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Product Features

  • Three-point, push-button calibration with auto-buffer recognition for a wide range of results
  • Automatic Temperature Compensation (ATC) for accurate readings in fluctuating temperatures
  • Unique, double-junction electrode design and increased reference gel volume for long electrode life in harsh environments
  • Large, upright, dual-line LCD display screen for ease of viewing, and to display indicators
  • Waterproof, dustproof housing that sits on a flat surface and the meter floats, if dropped in liquids

Product Details

Product Warranty: For warranty information about this product, please click here [PDF]
  • Shipping Information: View shipping rates and policies
  • Domestic Shipping: Item can be shipped within U.S.
  • International Shipping: This item is not eligible for international shipping. Learn More
  • ASIN: B0078Q3ZU6
  • Average Customer Review: 3.6 out of 5 stars  See all reviews (15 customer reviews)
  • Product Warranty: For warranty information about this product, please click here [PDF]

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Product Description

The Oakton 35634 pH Testr 10 is a handheld, waterproof and dustproof meter that floats, if dropped in liquid, and features a replaceable double-junction electrode within its reusable tester body. A portable meter is commonly used to measure the pH of substance such as food, beer, or wine, and is also used to test cleaning water, rinse water, and wastewater, in lab, industrial and food applications. This microprocessor-based meter has Automatic Temperature Compensation (ATC) for accurate readings in fluctuating temperatures, and three-point, push-button calibration with auto-buffer recognition of US and National Institute of Standards and Technology (NIST) standards for a wide range of results. The meter’s waterproof and dustproof housing has an Ingress Protection (IP) 67-rating for protection against solid objects or liquids. It has a large, upright, dual-line LCD screen for ease of viewing, error messages, a hold function which freezes readings for recording, and an auto shut-off that turns the meter off after 8.5 minutes of nonuse to extend the life of the batteries. It has a protective cap to reduce contamination and a double silicone O-ring for ease of electrode module replacement. The 35634-30 tester has an operating temperature from 0 to 50 degrees C (32 to 122 degrees F). pH range - 1.0 to 15.00, calibration up to three points with US or NIST buffers at 4.0, 6.86/7.0, or 9.18/10.0. Its dimensions are 6.5 (h) inches x 1.5 (w) inches (16.8 x 3.8 cm) and it weighs 3.25 ounces. The tester works with four 1.5 V alkaline batteries (not included) for up to 500 hours of continuous use (Eveready A76 or LR44 equivalent replacements). pH testers measure the acidity or alkalinity of a substance. They are commonly used for water testing, and for biological sample analysis in hydroponics, aquaculture and agriculture. Oakton Instruments manufactures an array of scientific instruments for research, industrial, and educational uses. Since 1991, Oakton has distributed a wide variety of instruments such as meters, electrodes, and transmitters. Oakton is based in Vernon Hills, IL, and has facilities in Europe, Asia, and China.

Customer Questions & Answers

Customer Reviews

Most Helpful Customer Reviews

11 of 11 people found the following review helpful By Randy J. Mercurio on January 22, 2011
Size: 30 pH Tester
I own the earlier model (Waterproof pHTestr 3+) of this, which looks almost the same except for the display, button arrangements and design of the face. This model's display looks much better but otherwise the body of this looks just like mine. In any case, if this version is anything like the last one I bought, I am very happy with this product. I also feel it is worth the $100 (I paid this amount years ago) as I have had mine for years and still haven't changed the batteries! If you buy one of these you'll also need some calibration solutions. I usually calibrate mine with the 4.01 and 7.00 solutions because I use this to check my aquarium pH. Read the instructions and if it tells you to...don't forget to keep the electrode moist when not in use. I usually pour a bit of the 7.00 solution into the electrode cover and stand it up supported by my calibration solutions.

I just had to add this one last comment...I opened my mouth about not having to change the batteries yet and wouldn't you know it that I was using it just after I wrote this review and there were the letters "bat" as I was pushing buttons to display a temperature reading on mine! They've lasted years so I still can't complain.
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1 of 1 people found the following review helpful By Kevin J. Kearns on December 10, 2012
Size: 20 pH Tester
I have been using this type of pocket meter for one year and have had 5 in that time. The meter works fine out of the box for about a month then begins to drift until it is no longer calibratable (probably not a word but it works). The environment in which we use our pH meters is about as benign as you can possibly get yet each one continues to fail us after 2 months. This is not a durable product and I would not recommend it.

Given the lack of other options for pocket pH meters, this is the only viable option we have at this time which is why we continue to drop $90 every other month.
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1 of 1 people found the following review helpful By Randy on August 5, 2013
Size: 20 pH Tester Verified Purchase
I have owned 2 of these pens and neither one lasted more than 6 months. Instead of only having to re-calibrate once a week as the directions say, I found that I had to do it every time I used the unit.
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Size: 30 pH Tester Verified Purchase
Great quality product. Holds Ph steady. Calibration is quick and easy. Worth the money in so many ways. Replacement tip is a plus
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By E. S. Gowen on January 24, 2014
Size: 10 pH Tester
I use a couple of different pH testers in the labs I work in. This one works okay, but I don't love it.

Pros:
-Replaceable probe, so that when your probe goes out (which it will) you don't have to buy an entirley new tester.
-Once calibrated it gives pretty reliable values.
-Easy to read.
-Easy to use.

Cons:
-When you calibrate this before each use it either accepts the values or gives you an error message. That usually means the probe is bad. I've had to replace the probe on both of mine several times.
-If the probe is giving you trouble it can take a couple of minutes to calibrate.

Let me know if you have any questions. Hope you have found this helpful.
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Size: 30 pH Tester Verified Purchase
this tester works as i expected it to. the only reason i didn't give it 5 stars is because i think that it drifts too quickly and needs to be calibrated more than once a week. my unit seems to drift about 0.5 in just a few days. calibration is fairly easy, but you do need to have calibration fluids purchased separately.
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Size: 10 pH Tester Verified Purchase
Delivered fast. Super easy setup with included directions. Readings were used to confirm my suspicions with my hydro setup. Make sure you buy the calibration fluids and storage solutions with initial purchase or you'll be waiting to use it like I was. Great product!
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Size: 30 pH Tester Verified Purchase
We have used Oakton pH meters in our industrial environment for years and they have always been accurate and consistent. I love the ease of use and this one also has a temperature readout as well. Great little meter
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