• Extends the life of your Bluelab OnePen™, minimizing the need for full device replacements
• Quick and simple to replace, reducing downtime and keeping your OnePen™ functioning optimally
• Built to last with a double-junction pH probe and titanium EC electrodes
• Delivers precise pH, Conductivity (EC), and Temperature readings with easy calibration
• Cost-effective, sustainable maintenance
• IP68-certified waterproof and dustproof

Hydroponic pH tester, waterproof, with automatic temperature compensation.

Stay connected - monitor, data log, and remotely view pH, conductivity and temperature readings.

Always On. Being There Optional.

Monitor your reservoir pH, Conductivity and Temperature with alerts on your phone when using the Wi-Fi capable Bluelab Guardian Monitor.

• Built-in Wi-Fi (with option to disable)
• High/low pH, temperature and conductivity alarms
• Non-volatile memory – keep settings through power loss
• Plant-safe green LEDs with adjustable display brightness
• 2 metre / 6.6 foot measurement probe cables
• 110 – 240 VAC (Mains powered)
• Interchangeable power plug
• Replaceable Bluelab pH Probe (with BNC connection)

When connected to Edenic by Bluelab app:

• Instant alarm alerts to your phone 
• Remote monitoring and control
• History reporting to assist data-driven decision making

Portable and waterproof pH tester with automatic temperature compensation, suitable for a wide range of applications.

Compact and precise pH tester with an extended probe for continuous monitoring of the nutrient solution.

6-in-1 Water Quality Monitor pH Meter TDS Temp Conductivity Detector Aquarium Online Measurement Analysis Tool PHT-026

Double junction epoxy pH electrode

Replaceable electrode for pH, EC, PPM, TDS, and temperature measurements, compatible with the P160 Pro pen. IP67 waterproof rating when attached to the meter.

Multi-parameter combo tester for pH, EC, CF, PPM, and temperature with replaceable electrodes and LED display, ideal for industrial use.

Replaceable EC, CF, PPM, and temperature electrode with PIN connector for easy and convenient use.

Replaceable pH electrode with BNC connector and a long lifespan due to the double junction.

Measure pH, EC, PPM, TDS, and temperature with great precision.

Durable and waterproof probe ideal for accurate measurements.

Milwaukee MA73600 Replacement Electrode for PH51 & PH54 Testers

Remote probe for Platinium continuous pH tester, ideal for constant monitoring of the nutrient solution, both indoors and outdoors.

Fast and accurate pH measurements from the palm of your hand 

• Fast sensor response for quicker readings on the go
• Multimedia friendly for measurements across a range of environments
• Toughened spear tip for direct root-zone measurements
• Simple two-point calibration process for ongoing accuracy
• Backlit LCD display to capture measurements with ease
• 2 x AAA alkaline batteries included