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Home » Saltwater Aquarium Supplies  » Testing Equipment  » Monitors & Controllers  » Single Item Monitors & Controllers  »  Captive Purity Portable pH Pen/Meter
Captive Purity Portable pH Pen/Meter

Captive Purity Portable pH Pen/Meter

This item has been discontinued
Item #:
CP2131

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Captive Purity Portable pH Pen/Meter Information


Product Manuals & Documentation

This handy pH pen/meter is a great tool for any aquarist. It is extremely easy to use and is waterproof. Simply dip the meter in the solution to get the pH reading. Its high accuracy and resolution also make it suitable even for the most-demanding applications.

Note: pH 7.0 solution is required for calibration.

Specifications:
  • Large Readout Display
  • Range: 0.0-14.0 pH
  • Resolution: 0.01 pH resolution
  • Accuracy: +/- 0.05 pH
  • Fixed Electrode
  • Operating Temperatures: 5`C to 50`C
  • ATC: Automatic Temperature Compensation for accurate readings!
  • Power Supply: 3 x 1.5 Volt (Button Battery)
  • Battery Life: 500 hours of continuous use
  • Size: 6" x 1.00" Largest Diameter
  • Weight: 70 Grams



Manufacturer Info

Captive Purity manufactures water filtration and water testing supplies for marine and reef aquaria. The brand is best known for their high-quality line of reverse osmosis filter systems and accessories. Captive Purity also produces refractometers for testing salinity, portable pen-sized meters for testing pH as well as replacement filter media for their RO and RO/DI filter systems.

Captive Purity Portable pH Pen/Meter Reviews



Average Rating
(8 reviews)
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Short life

by
Reviewers Rating Average


Posted: 5/23/2011 from FARINGDON, UNITED KINGDOM
3.0 5
Experience Level: Expert


Comments: Had this for six months. Was recieved and stayed within 0.1 at the 4,7 and 10 level. Worked a charm until..a 2 unit shift after six months and way off calibratable use. Batteries still at the 6 volt level. Very hard to recommend it now.


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not accurate

by
Reviewers Rating Below Average


Posted: 3/12/2011 from HAVELOCK, NC UNITED STATES
2.0 5
Experience Level: Expert


Comments: this pen meter doesn't calibrate accurately , ph buffer 4 cals good but then the ph buffer 7 will only go up to 6.8 and check of ph 10 buffer is only 9.5 . It will be ok for acidic solutions but not Base.


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Imposible to calibrate

by
Reviewers Rating Below Average


Posted: 4/20/2010
2.0 5
Experience Level: Intermediate


Comments: I thought the Pinpoint PH meter was difficult to calibrate but this one is at least as hard. You have to open the end cap and remove the battery (which consists of 4 "watch-batteries" - don't know what they are called - which is odd in itself) to get to the 4ph and 7ph screws. You have to go back and forth between the two solutions 5 times and then it will still not be acurate. The inside shows that it is extreme cheaply made. I am going back to my Pinpoint PH meter. I guess that was a waste of money.


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This is fantastic

by
Reviewers Rating Excellent!


Posted: 6/22/2009 from FRESNO, CA UNITED STATES
5.0 5
Experience Level: Beginner


Comments: I have only had this meter a week but so far it has been great. I work at a wastewater treatment plant and I took this pH meter to work and ran it next to the lab meter we have there. This meter was so accurate it wasn't even funny. It would be nice to have push button calibration but for this price I am not complaining. This is a great little meter and worth the price.


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Portable pH Pen Meter

by
Reviewers Rating Excellent!


Posted: 5/21/2009 from OAKLAND, CA UNITED STATES
5.0 5
Experience Level: Expert


Comments: I found this pH meter is accurate and very easy to use. This meter gives you read-out at 1/00 th accuracy. I don't like to compare the color with a chart every-time. It is easy to carry with you. Reviewed by Dr. Hidy Hiraoka, PhD in Science & Engineering


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Excellent for Nano Reefs

by
Reviewers Rating Excellent!


Posted: 1/21/2008 from MOUNTAINSIDE, NJ UNITED STATES
5.0 5
Experience Level: Expert


Comments: I really like this meter. Works well and you can actually just stick it in the bottle of calibration fluid and let it sit there while calibrating. I have used pinpoint meters before and enjoyed having the probe in the water all the time. However, now with a nano it is easier to just pull out the pen and inside of 30 seconds have an accurate ph reading.. clean off and put it away. Wish they made one for DKH ( that would be awesome ), Magnesium and Calcium, then I would be set.


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Returning product

by
Reviewers Rating Unsatisfactory


Posted: 9/21/2007 from DUBLIN, OH UNITED STATES
1.0 5
Experience Level: Expert


Comments: I returned the portable pH meter because it could not be calibrated according to directions.


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Works Great, On Second Try

by
Reviewers Rating Excellent!


Posted: 9/19/2007 from VIRGINIA BEACH, VA UNITED STAT
5.0 5
Experience Level: Intermediate


Comments: It works really well but the first one i recieved would not calibrate to specified PH setting so I had to return for a new one , so two weeks later (because i live on east coast) I got my new one and it works great. Would recommend.


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