Oakton pHTestr® 30 Waterproof Pocket Tester

Representative image only.
Oakton Item # EW-35634-30
Versatile, compact design works in a field or laboratory setting
  • 0.01 pH accuracy along with dual pH and selectable C or F temperature display
  • A complete meter with key features at an economical price
  • Replaceable, double-junction electrode sensors save time and money
  • IP67-rated housing sits flat on the table and floats in water

PRODUCT OPTIONS

$111.60USD / Each
$124.00USD / Each

$71.25USD / Each

for an additional
$71.25USD / Each
Time to recalibrate? Click on the calibration service to view details, then order.

SPECS & DESCRIPTION

Specifications & Description

  • Meter TypeTester
  • Display typeLCD
  • Min pH (pH)-1
  • Max pH (pH)15
  • pH Resolution0.01
  • pH Accuracy±0.01
  • Buffer RecognitionNIST and USA
  • CalibrationUp to 3 points
  • Min Temperature (° C)0
  • Max Temperature (° C)50
  • Min Temperature (° F)32
  • Max Temperature (° F)122
  • Temperature compensationAutomatic
  • WaterproofYes
  • Battery4 x A76 batteries (included)
  • Battery life (hr)500
  • Diameter (cm)3.81
  • Diameter (in)1 1/2
  • DescriptionWaterproof pH Testr 30 Pocket Tester

Key Features

  • 0.01 pH accuracy along with dual pH and selectable C or F temperature display
  • A complete meter with key features at an economical price
  • Replaceable, double-junction electrode sensors save time and money
  • IP67-rated housing sits flat on the table and floats in water

More About this Item

Waterproof pHTestr 30 is great for outdoor applications such as taking pH measurements in lakes and streams. Designed to float in water, you can even attach a line to the housing for easy retrieval. Valox sensor housing resists most chemicals.

The pHTestr 30 has a replaceable sensor for easy maintenance. Double-junction electrode sensor handles wastewater and solutions containing sulfides, heavy metals, and TRIS. Electrode sensor offers a clog-resistant Kynar® junction and a recessed, glass pH bulb to protect against breakage.

The keypad clicks to confirm operation, and allows access to a variety of functions. Calibrate up to three pH points with the auto-buffer recognition at both USA and NIST standard buffers. Additional features include a automatic temperature compensation (ATC), hold function, auto-off function, self-diagnostic error messages, and a three-segment battery-life indicator.

Meter includes: protective plastic storage case, lanyard, and batteries.

ACCESSORIES

REVIEWS

REVIEW SNAPSHOT®

by PowerReviews
Oakton pHTestr 30 Waterproof pH Testr 30 Pocket Tester
 
3.7

(based on 17 reviews)

71%

of respondents would recommend this to a friend.

Pros

  • Easy to use (10)
  • Durable (6)
  • Accurate (5)
  • Works properly (5)
  • Exhibits correct properties (4)

Cons

No Cons

Best Uses

  • In the field (11)
  • In the lab (5)
    • Reviewer Profile:
    • Academic/professional researcher (7), Lab assistant (6)

Reviewed by 17 customers

Displaying reviews 1-17

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4.0

Economical Tester for wet enviroment

By 

from Michigan

Verified Buyer

Comments about Oakton pHTestr 30 Waterproof pH Testr 30 Pocket Tester:

This tester arrived quickly and worked well for the first week before the probe malfunctioned. Cole-Parmer was on the ball and had a replacement probe to us fast, without any hassle.

  • Gender:
  • Male
  • Was this a gift?:
  • No
 
4.0

A good product

By 

from Winchester UK

Verified Buyer

Comments about Oakton pHTestr 30 Waterproof pH Testr 30 Pocket Tester:

I have only had this meter a few weeks but it is accurate and reliable. I use this for orchids with varying ph needs and it does the job

  • Was this a gift?:
  • No
 
4.0

pH Testr

By 

from SD

About Me Lab Assistant

Verified Buyer

Pros

  • Easy To Use
  • Exhibits Correct Properties

Cons

    Best Uses

    • In The Lab

    Comments about Oakton pHTestr 30 Waterproof pH Testr 30 Pocket Tester:

    Use it to test Jams and Jellies for clients

    (1 of 1 customers found this review helpful)

     
    5.0

    Reliable filed testing for 4 years

    By 

    from Lewiston, Maine

    About Me Lab Assistant

    Verified Reviewer

    Pros

    • Easy To Use
    • Exhibits Correct Properties

    Cons

    • No Mv Readouts

    Best Uses

    • In The Field

    Comments about Oakton pHTestr 30 Waterproof pH Testr 30 Pocket Tester:

    As a Pretreatment inspector I need a reliable and easy to use instrument for field testing. 3 buffer calibration capability is a must as is the rugged probe. Once you get the hang of the calibration (you do have to wait the full two to three minutes between buffers) its very simple to operate. it does have to be kept wet (in electrode storage solution) between outings or the probe will fail.

     
    1.0

    Oakton Ph30 won 't calibrate

    By 

    from Southwest

    About Me Academic/Professional Researcher

    Pros

      Cons

      • Exhibits Incorrect Properties
      • W
      • Will Not Calibrate

      Best Uses

      • None

      Comments about Oakton pHTestr 30 Waterproof pH Testr 30 Pocket Tester:

      this is the worst ph pen i have ever had in my 30 yeard of hydroponics. This is the second pen and it has the same problems as the first PH30 pen. It will not calibrate past a 2 point level and the readings are off by as much as 2 points when a simple one point calibration is attempted. Do not rely on this pen for any accuracy whatsoever as it will ruin your garden. What reads 6.0 on the Oakton Ph30 was actually 2.9 on a cheap Milwakee backup pen. Thank goodness for the back up pen.

       
      5.0

      Great pH Meter

      By 

      from Oklahoma

      About Me Academic/Professional Researcher

      Pros

      • Easy To Use
      • Exhibits Correct Properties

      Cons

        Best Uses

        • In The Field
        • In The Lab

        Comments about Oakton pHTestr 30 Waterproof pH Testr 30 Pocket Tester:

        Great pH Meter. Con pH element has to be replaced from time to time, but that is true with all pH meters reguardless of maker. pH 30 gave great reading, but user must read instructions and learn to use the meter. I have owned the pH 30 for Six years and have replaced the pH element twice. I would purchase this pH 30 Meter again.

        (1 of 1 customers found this review helpful)

         
        3.0

        pHone Tester 30 challenges

        By 

        from Seattle

        Pros

        • Easy To Read
        • Waterproof

        Cons

        • Calibration Seems Off
        • Difficult To Calibrate Te
        • Temp Calibration Difficul

        Best Uses

        • In The Field
        • In The Lab

        Comments about Oakton pHTestr 30 Waterproof pH Testr 30 Pocket Tester:

        I found it difficult to calibrate the temperature accurately. Also, the calibration seem to go off to easily just a day later. Not sure if I can trust the reading on the same product on the next day. It would be good to have a help line to call when using the device to ensure is being done properly.

         
        5.0

        Follow Instructions

        By 

        from Ville Platte, LA

        About Me Academic/Professional Researcher

        Pros

          Cons

            Best Uses

            • In The Field
            • In The Lab
            • Research

            Comments about Oakton pHTestr 30 Waterproof pH Testr 30 Pocket Tester:

            Read, read, read directions. When one does, it's accurate and easy to use. I have used it in different situations. I have found that the more it is used, the accuracy lasts much longer, i.e., two dozen uses. Inactivity requires, less than three uses per week, calibration each time. and, to use the old addage, that's the best money I have ever spent...
            Brett

            (2 of 3 customers found this review helpful)

             
            5.0

            Great little cost effective tool!

            By 

            from Baytown, Texas

            About Me Academic/Professional Researcher

            Verified Reviewer

            Pros

            • Easy To Use
            • Exhibits Correct Properties
            • Kidproof
            • Reliable
            • Sturdy

            Cons

            • Seals Can Be Troublesome

            Best Uses

            • Aquarium Maintenance
            • Checking Potable Ice
            • Checking Potable Water
            • In The Field
            • Pool Maintenance

            Comments about Oakton pHTestr 30 Waterproof pH Testr 30 Pocket Tester:

            As a Water Lab Technician in Baghdad. It fell to my department to test potable water systems daily for the US Military. Our crew was primarily low skilled workers from various countries with little to no English skills. These meters were perfect for that environment. The only problem we ever encountered was in changing the electrode. It is critical that it be done in a dry environment and that the seal be set just snug. Over tightening would cause the seal to leak thus ruining the electrode and the meter. Once the seal is snug a perminant marker line across the joint will give you a visual reference that the seal is still in proper position.

            (2 of 9 customers found this review helpful)

             
            1.0

            dont get this thing

            By 

            from pittsburgh area

            About Me Academic/Professional Researcher

            Pros

              Cons

              • Exhibits Incorrect Properties
              • Inconsistant Lousy Produ

              Best Uses

              • In The Field

              Comments about Oakton pHTestr 30 Waterproof pH Testr 30 Pocket Tester:

              never never nerve get these things again... tech support all mouth nothing of substance. i don't know what happened to these once fine meters

              (2 of 9 customers found this review helpful)

               
              2.0

              wont calibrate well

              By 

              from fl

              About Me Lab Assistant

              Verified Buyer

              Pros

              • Easy To Use

              Cons

              • Doesn't Work Properly

              Best Uses

                Comments about Oakton pHTestr 30 Waterproof pH Testr 30 Pocket Tester:

                won't calibrate well. ihave to return and get another one

                (1 of 9 customers found this review helpful)

                 
                2.0

                Quality is falling

                By 

                from Baton Rouge, LA

                About Me Lab Assistant

                Verified Buyer

                Pros

                  Cons

                  • Breaks Easily

                  Best Uses

                    Comments about Oakton pHTestr 30 Waterproof pH Testr 30 Pocket Tester:

                    I have sent three of these back in the last two months. I would not recommend buying this product until they have worked out the problems

                    (8 of 10 customers found this review helpful)

                     
                    5.0

                    JUST WHAT I NEEDED

                    By 

                    from MAYBERRY, NC

                    About Me Lab Assistant

                    Verified Buyer

                    Pros

                    • Accurate
                    • Durable
                    • Easy To Use
                    • Well Calibrated
                    • Works Properly

                    Cons

                      Best Uses

                      • In The Field

                      Comments about Oakton pHTestr 30 Waterproof pH Testr 30 Pocket Tester:

                      JUMPS THROUGH ALL THE HOOPS I NEED IT TO!

                      (6 of 6 customers found this review helpful)

                       
                      4.0

                      A good product

                      By 

                      from New Haven CT

                      About Me Academic/Professional Researcher

                      Pros

                      • Accurate
                      • Durable
                      • Easy to calibrate
                      • Easy To Use
                      • Works Properly

                      Cons

                        Best Uses

                        • In The Field

                        Comments about Oakton pHTestr 30 Waterproof pH Testr 30 Pocket Tester:

                        We use 15 of these for 3 weeks in the field each summer. Completely untrained students use them on streams, and we intercompare results. The mean difference is 0.10 pH units and the median 0.065. I consider that to be excellent. After 4 years we had to replace all of the electrodes, perhaps because they sat dry most of the time, though this is recommended storage by the manufacturer.

                        (3 of 3 customers found this review helpful)

                         
                        4.0

                        Good, solid meter

                        By 

                        from Iowa

                        About Me Lab Assistant

                        Verified Reviewer

                        Pros

                        • Accurate
                        • Durable
                        • Easy To Use
                        • Well Calibrated
                        • Works Properly

                        Cons

                          Best Uses

                          • In The Field

                          Comments about Oakton pHTestr 30 Waterproof pH Testr 30 Pocket Tester:

                          used in the field every day in an industrial setting and it's been the most reliable meter we've had over the years. Our first one lasted three years and we will buy another one.

                          (6 of 6 customers found this review helpful)

                           
                          5.0

                          Rugged and Portable pH Meter

                          By 

                          from Buffalo, NY

                          About Me Academic/Professional Researcher

                          Verified Buyer

                          Pros

                          • Accurate
                          • Affordable
                          • Durable
                          • Easy To Use
                          • Portable
                          • Versatile
                          • Well Calibrated
                          • Works Properly

                          Cons

                            Best Uses

                            • In The Field
                            • In The Lab

                            Comments about Oakton pHTestr 30 Waterproof pH Testr 30 Pocket Tester:

                            Excellent for use in the field or lab. Very durable. Very accurate. Quick response. So portable, it can be carried in your pocket.

                            (5 of 5 customers found this review helpful)

                             
                            4.0

                            PHTESTR 30 used in Lab Animal Water

                            By 

                            from Tewksbury Mass

                            Verified Buyer

                            Pros

                            • Accurate
                            • Durable
                            • Easy To Use
                            • Well Calibrated
                            • Works Properly

                            Cons

                            • Response time slow

                            Best Uses

                            • In The Field

                            Comments about Oakton pHTestr 30 Waterproof pH Testr 30 Pocket Tester:

                            I use this product to check the Ph of Laboratory animal drinking water(Rodents). The Ph of the animal drinking water needs to be in the 2.0 to 3.0 range . The PHTESTR 30, WATERPROOF, DJ, WITH TEMPERATURE READOUT pHTestr works very well in this range.

                            Displaying reviews 1-17

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                            Q&A

                            Do you have questions about this product?

                            Get answers from real customers and in-house experts with AnswerBox.

                            26 Questions | 27 Answers
                            Displaying questions 1-10Previous | Next »
                            • Q:

                              Can this product be used for testing the PH level during Yogurt formation ?
                              If yes then how many times can it be used before changing or replacing anything
                              Asked on 4/30/2016 by samir from India

                              1 answer

                              • STAFF EXPERT

                                A:

                                This pH tester has a double junction sealed electrode. For measuring yogurt and cream-type products a pH electrode with a low resistance pH bulb with a double junction design with an outer chamber that is refillable will be best. Using a handheld meter with a glass refillable electrode would be more accurate in measuring yogurt.

                                Answered on 5/2/2016 by Katie from Technical Support
                            • Q:

                              Hi, we have a 35634-30 ph tester and need to know which calibration solution we need to buy for this unit. Which one do you recommend for us?
                              Asked on 3/21/2016 by The Perpetual Tormentor from Santa Fe Springs, CA 90670

                              1 answer

                              • STAFF EXPERT

                                A:

                                PH 4, 7, and 10 buffer is recommended for this tester. I would recommend the buffer pack 05942-10.

                                Answered on 3/21/2016 by Katie from Technical Support
                            • Q:

                              Can this tester be used to test food? If so, what accessories must I buy in addition to the unit, and what is comes with the tester out of the box?

                              Thanks,
                              Craig
                              Asked on 1/19/2016 by Craig from United States

                              1 answer

                              • STAFF EXPERT

                                A:

                                This pHTestr will incorporate a double-junction electrode design, which would protect the porous plug from direct contact with the particulate/solids in solution such as food. We do suggest that the food be sampled from the container and tested, rather than directly testing within the batch, as the electrode will include a fragile glass bulb. With this being said, the pHTestr 30 should be appropriate for the application if properly calibrated, cleaned, and maintained. The only other accessories I would recommend would be a buffer pack for calibration, cleaning, and storage such as item 05942-15.

                                Answered on 1/20/2016 by Danielle from Technical Support
                            • Q:

                              How and what solution should the Oakton Ph Meter 30 be stored in when not in use?
                              Usage is 1-3 per week, maybe less.
                              Thanks
                              Asked on 12/8/2015 by Operator #4 from WY

                              1 answer

                              • STAFF EXPERT

                                A:

                                A pH 4 buffer is ideal, tap water is also acceptable.

                                Answered on 12/8/2015 by Dan from Technical Support
                            • Q:

                              How do get a slope and this PH testr 30 meter
                              Asked on 5/18/2015 by j from United States

                              1 answer

                              • STAFF EXPERT

                                A:

                                This unit does not calculate slope and it would need to be calculated manually. The millivolt slope is determined by the difference between the millivolt readings when the probe is placed in different buffers. For example, if in buffer 7 the millivolt reading is -10 and in buffer 10 it read -177, then the slope is -177 minus a negative 10 for a difference of -167 millivolts. The millivolt slope must be between an absolute value of 165 and 180 millivolts between buffers 4 and 7 or between 7 and 10. Checking the sensor's slope will keep you aware of the probe's status and when it is time to consider replacement. When the pH slope calculation is showing that the slope has dropped to the 165 mvrange, replacement is necessary.
                                Ideal mv Values : Buffer 4 = +177 +/- 50mv, Buffer 7 = 0 +/- 50mv, Buffer 10 = +177 +/- 50 mv.

                                Answered on 5/18/2015 by Danielle from Technical Support
                            • Q:

                              Is this product capable of storing data sets? If so, how many?
                              Asked on 4/30/2015 by Zach

                              1 answer

                              • STAFF EXPERT

                                A:

                                The meter will store calibration values but will not store measured data.

                                Answered on 4/30/2015 by Polo from Technical Support
                            • Q:

                              Is this meter approved by EPA for wastewater ?
                              Asked on 1/6/2015 by Larry from Ashford, Al.

                              1 answer

                              • STAFF EXPERT

                                A:

                                EPA does not approve specific products by brand or model. The method for federal or state EPA should be reviewed for recommended procedures. The primary requirements for pH is the meter should have ATC (Automatic Temperature Compensation) and the ability to be calibrated against known standards. The 35634-30 fulfills both.

                                Answered on 1/6/2015 by Dan from Technical Support
                            • Q:

                              Can this be used to test the Ph of DI water?
                              Asked on 11/7/2014 by PH from Ireland

                              2 answers

                              • STAFF EXPERT

                                A:

                                Yes, it can be used to test DI water. Pure water sometimes requires a little longer to stabilize, but it will still register.

                                Answered on 11/7/2014 by Jay from Technical Support
                              • A:

                                Because it's deionized water, adding 1-2 drops of approximately 3.5M KCl to the sample can help the stabilize the meter more quickly. Use reagent grade KCl to avoid impurities that may affect pH.

                                Answered on 1/23/2017 by Mike from Canmore from Shelburne, NS, Canada
                            • Q:

                              Can I calibrate my pH meter Oakton pHtestr 30 in tap filtered water? Can you show me how to calibrate it with tap water?
                              Asked on 10/20/2014 by Marcos from Triad NC

                              1 answer

                              • STAFF EXPERT

                                A:

                                The pH meter needs to be calibrated in a pH buffer in order to ensure good results. Tap water can have a variable pH and is not suitable for acting as a comparison standard.

                                Answered on 10/20/2014 by Jay from Technical Support
                            • Q:

                              Can I use my pH meter pHTestr 30 in a substance that contains oil? This substance contains vinegar, water, red chili pepper, spices, and oil of course. Will it get clogged eventually or not? will the reading be inaccurate or altered?
                              Asked on 10/20/2014 by Marcos from Triad, NC

                              1 answer

                              • STAFF EXPERT

                                A:

                                The Oakton pHTestr 30 has a replaceable double junction sensor. The double junction is designed to handle 'dirty' samples and resists clogging. The sensor also offers a clog resistant Kynar junction. To ensure accurate readings over time make sure the sensor is cleaned after every use.

                                Answered on 10/20/2014 by Danielle from Technical Support
                            Displaying questions 1-10Previous | Next »

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