The ultimate handy solution for measuring pH!

Plants get their nutrition from minerals but they can only get all the right minerals they need if certain conditions are right.

A key factor that affects food uptake is whether your solution is acid or alkaline. We measure this in pH.

The Bluelab pH Pen is the latest innovation for hand held meters. It provides a compact quick and handy way to manage the success of your crops to ensure maximum uptake of nutrients. Teamed with our Bluelab EC Pen or Bluelab ppm Pen, you have a handy, convenient and accurate system for ensuring optimum plant growth and health.

BlueLab PH Pen

  • • Measures pH and temperature 
    • Selectable units for °C & °F 
    • Backlit LCD display 
    • Double junction probe (not replaceable) 
    • Successful pH calibration indicator 
    • Hold reading function 
    • Low battery indicator 
    • Fully waterproof 
    • Auto off function 
    • Automatic temperature compensation


150 Product ratings

83% would recommend

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not the quietest at all . works great

not the quietest at all . works great

I recommend this product.


11/23/2018, 8:13:41 AM

great customer service

top-notch customer service. great products. I highly recommend drip right products.

I recommend this product.


11/23/2018, 8:13:41 AM

Quite Pleased

System works great. But the customer service provided by this company had me in awe. This is customer service from another dimension. Thanks again, Martin!

I recommend this product.


11/23/2018, 8:13:41 AM

Vacation peace of mind

The HydroLock system works excellent! I went on vacation for 9 days and had no one to look over my plants; they would have died if not for this watering system! I had a webcam hooked up to check on the tent while away, and can report that the HydroLock system worked very reliably.

I had very minimal experience with PVC cement before this, and still found it very easy to set up. I highly recommend buying the Barb Insert Gun from the accessories page. I did not and connecting the hoses to the plastic barbs was the only difficult part of the setup. As a temporary reservoir I used a food grade 5 gallon bucket with a lid that had a hole in the top for PEX tubing to the pump.

Customer service has been great also! I asked a few questions by web chat and by phone, and got the exact info I needed from the owner.

The 10” HydroLock domes just barely fit in my 3 gallon fabric pots; it seems they are designed more for 5 or 8 gallon pots. The owner said they do plan to release smaller domes in the future also. I used this for just 2 plants so far, but the kit supports up to 6 and is expandable to 24 plants using the same pump.

For anyone looking to automate their watering, this is the company to go with! Excellent product and customer service!

I recommend this product.


11/23/2018, 8:13:41 AM

Does what it says

These things have a good spray and seem to reduce how much I need to water. I run organic and haven’t had any issues clogging for over 20 days now. I’m impressed.

I recommend this product.


11/23/2018, 8:13:41 AM

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