bluelab pH Pen Faq & Troubleshooting

Backlit LCD display
Low battery indicator
Hold reading function
Fully waterproof
Fully guaranteed for 1 year (with proof of
purchase)
Auto-off function
Double junction probe
Automatic Temperature Compensation
(ATC)
Successful calibration indicator
Selectable units for °C and °F
• Register your 1-year limited written warranty with Bluelab
• Download a PDF of the technical specs in English
• Download a PDF of the Bluelab pH Pen manual in your language:
o English
o German
o Spanish
o Latin American Spanish
o Dutch
o Canadian French
Get started
Get started with the Bluelab pH Pen in 3 easy steps:
1. Hydrate your Bluelab pH Pen. Before first use, you must first hydrate the pH pen in
KCl solution for 24 hours and then calibrate the pen using the calibration guide below.
2. Calibrate your pH pen. Calibrate before first use and return to this guide if you need a
monthly calibration refresher.
3. Take your first measurement. Submerge the probe in your nutrient reservoir to view the
readings on the display. Read this guide for correct usage.
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bluelab pH Pen Specifications

General

Measurement Range	0.0 - 14.0 pH
Accuracy	+/- 0.1 pH
Resolution	0.1 pH
Automatic Temperature Compensation	Yes
Power Source	1 x AAA battery
Waterproof	Yes
Waterproof Rating	IP67
Calibration	Two-point calibration
Temperature Range	0 - 50 °C (32 - 122 °F)