Bluelab Replacement pH Probe

Bluelab Replacement pH Probe — Official Replacement pH Probe for Bluelab Monitors & Controllers

The Bluelab® Replacement pH Probe is the official replacement probe for Bluelab pH monitors and controllers, including the Bluelab Guardian Monitor and compatible Bluelab controller models. pH probes are consumable components with a finite service life — regular replacement is a normal part of operating any pH monitoring or control system. When your existing probe shows signs of wear — slow response times, drifting readings, or inability to calibrate accurately — replacing it with a genuine Bluelab probe restores your instrument to full measurement accuracy.

Using an official Bluelab replacement probe ensures compatibility with your instrument’s calibration system, alarm settings, and display, and maintains the measurement accuracy your crop management decisions depend on. The probe carries a 6-month Bluelab® guarantee.

Key Features

• Official replacement pH probe for Bluelab monitors and controllers
• Restores full pH measurement accuracy to your Bluelab instrument
• Compatible with Bluelab Guardian Monitor and compatible controller models
• 6-month Bluelab® guarantee on probe
• Genuine Bluelab part for assured compatibility and performance

Frequently Asked Questions

Which Bluelab instruments is this replacement pH probe compatible with?

The Bluelab Replacement pH Probe is designed for use with Bluelab pH monitors and controllers that use a replaceable probe connection, including the Bluelab Guardian Monitor and compatible Bluelab controller models. Always verify compatibility with your specific Bluelab instrument model before ordering. For instruments that use a BNC connection (such as the Combo Meter or Multimedia pH Meter), the Bluelab Leap pH Probe is the appropriate replacement. For the Guardian Monitor Connect In-Line, the Bluelab Inline pH Probe is the correct replacement.

How do I know when my Bluelab pH probe needs to be replaced?

Common signs that a pH probe needs replacement include: slow or sluggish response times when pH changes, persistent reading drift that cannot be corrected through cleaning and recalibration, inability to calibrate accurately to pH 7.0 and pH 4.0 reference solutions, or physical damage to the probe body or junction. pH probes typically have a service life of 6–12 months depending on usage intensity, solution chemistry, and maintenance practices. Regular calibration and proper storage in KCl solution can extend probe life, but replacement is eventually necessary for all pH probes.

How do I extend the life of my Bluelab replacement pH probe?

To maximize the service life of your replacement pH probe: store it in Bluelab KCl Storage Solution after every use to keep the probe membrane hydrated; calibrate it at least once a week using Bluelab pH 7.0 and pH 4.0 calibration solutions; clean the probe regularly to remove mineral deposits and biofilm; and avoid exposing the probe to strong oxidizing agents, extreme temperatures, or physical impacts. Consistent probe care is the most effective way to extend service life and maintain measurement accuracy.

Is the Bluelab Replacement pH Probe covered by a guarantee?

Yes. The Bluelab Replacement pH Probe carries a 6-month Bluelab® guarantee from the date of purchase. This guarantee covers manufacturing defects and is consistent with the probe guarantee provided on new Bluelab instruments. Note that probe guarantees are separate from the instrument guarantee — the Guardian Monitor, for example, carries a 2-year instrument guarantee with a 6-month probe guarantee.

Where can I buy the Bluelab Replacement pH Probe?

The Bluelab Replacement pH Probe is available through Seres Ag, a professional hydroponic and CEA equipment supplier serving commercial growers across the United States. Purchase directly at seresag.com. Seres Ag offers competitive pricing on Bluelab replacement parts and consumables, expert support, and US-wide shipping. For wholesale or bulk orders, contact the Seres Ag team through the website.