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Oakton Waterproof pH Testr 30 Pocket Tester

Item# EW-35634-30

$120.00 USD/EACH

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  • 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
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.
Product Type pH Tester
Meter style Tester
Range (pH) -1.00 to 15.00 pH
Range (Temperature °C) 0 to 50
Range (Temperature °F) 32 to 122
Resolution (pH) 0.01
Accuracy (pH) +/- 0.01
Temperature compensation Automatic
Display LCD
Calibration Up to 3
Qty/ea 1
Waterproof Yes
Buffer recognition USA, NIST
Power Four 1.5V batteries
Battery life 500 hours
CE Compliance Yes
Brand Oakton
Dimensions (" L) 6 1/2
Dimensions (" Dia) 1 1/2

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Questions and Answers

Do you have questions about this product?

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

26 Questions | 26 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

    1 answer

    • 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
  • 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
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Product Reviews

REVIEW SNAPSHOT®

by PowerReviews
Oakton Waterproof pHTestr 30 Pocket pH Tester
 
3.6

(based on 14 reviews)

64%

of respondents would recommend this to a friend.

Pros

  • Easy to use (9)
  • Durable (6)
  • Accurate (5)
  • Works properly (5)
  • Well calibrated (4)

Cons

No Cons

Best Uses

  • In the field (11)
  • In the lab (4)
    • Reviewer Profile:
    • Academic/professional researcher (7), Lab assistant (5)

Reviewed by 14 customers

Displaying reviews 1-14

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(1 of 1 customers found this review helpful)

 
5.0

Reliable filed testing for 4 years

By Vivian the Inspector

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 Waterproof pHTestr 30 Pocket pH 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 Buck

from Southwest

About Me Academic/Professional Researcher

Pros

    Cons

    • Exhibits Incorrect Properties
    • W
    • Will Not Calibrate

    Best Uses

    • None

    Comments about Oakton Waterproof pHTestr 30 Pocket pH 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 Tim

    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 Waterproof pHTestr 30 Pocket pH 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 mp

      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 Waterproof pHTestr 30 Pocket pH 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 Brett La Cajin

      from Ville Platte, LA

      About Me Academic/Professional Researcher

      Pros

        Cons

          Best Uses

          • In The Field
          • In The Lab
          • Research

          Comments about Oakton Waterproof pHTestr 30 Pocket pH 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

          (1 of 2 customers found this review helpful)

           
          5.0

          Great little cost effective tool!

          By Water Lady

          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 Waterproof pHTestr 30 Pocket pH 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.

          (1 of 8 customers found this review helpful)

           
          1.0

          dont get this thing

          By jim

          from pittsburgh area

          About Me Academic/Professional Researcher

          Pros

            Cons

            • Exhibits Incorrect Properties
            • Inconsistant Lousy Produ

            Best Uses

            • In The Field

            Comments about Oakton Waterproof pHTestr 30 Pocket pH 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

            (1 of 8 customers found this review helpful)

             
            2.0

            wont calibrate well

            By bergh

            from fl

            About Me Lab Assistant

            Verified Buyer

            Pros

            • Easy To Use

            Cons

            • Doesn't Work Properly

            Best Uses

              Comments about Oakton Waterproof pHTestr 30 Pocket pH 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 Marie

              from Baton Rouge, LA

              About Me Lab Assistant

              Verified Buyer

              Pros

                Cons

                • Breaks Easily

                Best Uses

                  Comments about Oakton Waterproof pHTestr 30 Pocket pH 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 DAVE

                  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 Waterproof pHTestr 30 Pocket pH Tester:

                    JUMPS THROUGH ALL THE HOOPS I NEED IT TO!

                    (6 of 6 customers found this review helpful)

                     
                    4.0

                    A good product

                    By Professor

                    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 Waterproof pHTestr 30 Pocket pH 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 Bob

                      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 Waterproof pHTestr 30 Pocket pH 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 RAFCO Environmental

                        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 Waterproof pHTestr 30 Pocket pH 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 Frank "The rodent microbiologist"

                          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 Waterproof pHTestr 30 Pocket pH 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.

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