Hanna Instruments "Checker Plus" pH Pen

As you can probably tell by now, we're big fans of "blackwater" biotopes, and we offer a wide variety of aquatic botanicals to help you replicate these environments. Of course, many of these waters are replete with decomposing leaves, seeds, branches, and wood (kinda like the stuff we offer), and these materials impact the pH of the water significantly. In closed systems, it's a really good idea to test the pH regularly when working with these tannin-rich materials.

Liquid reagent test kits are okay..they have been the standard for many years. However, when you're trying to find a hobby test kit that measures low-range pH, 6.9 and below, like we dabble in, your choices disappear really quickly. We opt in this case for electronic technology! And of course, we're all about easy. The pH Checker is ridiculously easy to use....It gives you fast and accurate readings from 0 to 14 pH with a resolution of 0.01 pH! That's crazy-accurate, folks!  This compact tester features an easy-to-read LCD, and simple-to-perform two point calibration. It's lightweight, durable and reliable, providing fast readings and up to 3000 hours of battery life! The pH electrode is easily replaced; you just unscrew the electrode from the meter body and screw on a new one.


Super easy.

And now, the facts:

  • Range 0.00 to 14.00 pH 
  • Resolution 0.01 pH 
  • Accuracy ±0.2 pH 
  • Calibration manual, 2 points 
  • Electrode HI 1270 (included) 
  • Battery Type / Life 1.5V (2) / approximately 3000 hours of continuous use 
  • Environment 0 to 50°C (32 to 122°F); RH max 95% 
  • Dimensions 50 x 174 x 21 mm (2.6 x 6.8 x 0.9") - with probe 
  • Weight 50 g (1.8 oz.) without probe
  • pH Calibration Solutions and cleaning fluid are included!  Electrode Storage Fluid is sold separately

*Flat rate shipping $9.00 for all orders under $75.00 in the U.S.A. Orders $75.00 and over ship FREE in the U.S.A! WE SHIP INTERNATIONALLY! Please review our "Shipping" section for the latest information!