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Bluelab pH probe inline with BNC connector on black background.
Bluelab pH probe screwed into white PVC pipe fitting with a white cable leading to a black sensor.
Bluelab pH probe attached to white pipe, with blurry greenery background.
Bluelab pH probe inline with BNC connector on black background.
Bluelab pH probe screwed into white PVC pipe fitting with a white cable leading to a black sensor.
Bluelab pH probe attached to white pipe, with blurry greenery background.
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Bluelab pH Probe Inline - Replacement Probe for Guardian Monitor Inline

Official Bluelab Dealer Model: PROBPHIN
$209.00 USD$199.00 USD$209.00 USD
 $209.00 USD
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Term:6 weeks, 6 or 12 months
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Term:Up to 36 months
Interest:Processing fee + interest
Lease-to-Own?Yes
Amount:$500 to $10,000
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  • Rated to withstand pressures up to 100 psi or 7 bar.
  • Standard BNC connector fits most compatible monitors.
  • Designed for 3/4 inch inline thread mounting.
  • 1-year limited warranty
  • View More Details

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VOLUME PRICING

Commercial & Bulk Purchasing

We support operations & licensed facilities with volume pricing, dedicated account managers, and custom equipment consultation.

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THROUGH THE Cultivator's LENS Hands-On Evaluation

  • You are integrating automated dosing into your lines because standard reservoir probes cannot handle your system pressure.
  • You are replacing a worn sensor because you need an inline solution that mounts directly into your existing plumbing.

  • The 3/4 inch threaded housing is surprisingly solid, and it seals up tight against leaks under pressure.
  • We tell people to keep the KCl storage cap handy because a dry probe will drift and lose its accuracy fast.

  • Operators who switched to this inline probe say they stopped seeing the fluctuating readings caused by line pressure.
  • Users report that the 3 meter cable length lets them tuck the monitor away neatly from active dosing pumps.

Bluelab pH Probe Inline -  Replacement Probe for Guardian Monitor Inline

Standard pH probes aren't built to handle line pressure, making them a poor fit for inline dosing systems where a reservoir probe simply won't hold up. The Bluelab pH Probe Inline solves this with a 3/4" thread designed for inline mounting in any direction, rated to withstand up to 100 psi (7 bar) — built as a direct replacement probe for the Bluelab Guardian Monitor Inline.

A double-junction design and standard BNC connector keep it compatible with BNC-connection devices like the Bluelab Combo Meter, while a 3-metre (9.8ft) cable gives you flexibility in routing around pumps, valves, and dosing lines. Fully waterproof construction holds up to constant exposure in a pressurized system.

A KCl-filled storage cap keeps the probe hydrated between uses; for best results, maintain the cap with Bluelab KCl Storage Solution to protect accuracy and extend its working life in demanding inline installations.

Features

🔧
3/4" Inline Thread

Mounts in any direction for flexible inline installation.

💪
Rated to 100 psi (7 Bar)

Withstands high line pressure for reliable inline performance.

🔬
Double-Junction Design

Delivers consistent, reliable pH measurements in solution.

🔌
Standard BNC Connector

Compatible with any compatible meter or monitor using BNC.

📏
3m / 9.8ft Cable

Gives you routing flexibility around pumps and dosing lines.

💧
KCl-Filled Storage Cap

Keeps the probe hydrated and ready between uses.

What's Included

  • Bluelab pH Probe Inline
  • KCl-Filled Storage Cap

Specifications

Specification Value
pH Range 0.0–14.0
Device Resolution 0.1 and 0.01 pH
Maximum Operating Pressure 100 psi (7 bar)
Operating Environment Nutrient solution, 0.2 EC and above; 32–212°F (0–100°C) — do not use or store outside this range

Warranty

The Bluelab pH Probe Inline is covered by a 1-year limited warranty.

Frequently Asked Questions

What is this probe a replacement for? +

It's a replacement pH probe for the Bluelab Guardian Monitor Inline, built specifically for inline pressurized installation.

What pressure can this probe handle? +

It's rated to withstand up to 100 psi (7 bar), making it suitable for pressurized dosing lines and inline systems.

How does the mounting work? +

The probe uses a 3/4" thread and can be mounted in any direction, giving you flexibility in your inline setup.

How long is the probe cable? +

The cable measures 3 metres (9.8ft), giving you routing flexibility around pumps and dosing lines.

How do I keep the probe in good condition between uses? +

The included KCl-filled storage cap keeps the probe hydrated when not in use. Using KCl storage solution helps protect its accuracy and lifespan.

Happy To Help

Questions About This Product?

Our specialists are happy to help. Call us or send a message and we'll get back to you within one business day (most of the time within a few hours.)

Call (360) 800-5535

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