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Bluelab ORP Meter - Water Quality & Disinfection Monitor

$219.00 USD
starting from 0% interest financing from /mo.

Payment Options

Options:Pay in Four, Pay Monthly
Amount:Up to $1,500 (Pay in 4)
Up to $10,000 (Monthly)
Schedule:Bi-weekly to Monthly
Term:6 weeks, 12 or 24 months
Interest:0% to 35.99% APR*
Credit Check?Soft Check Only
Schedule:Bi-weekly to Monthly
Term:6 weeks, 6 or 12 months
Interest:0% to 35.99% APR*
Credit Check?Soft Check Only
Finance up to:$4,000
Must apply on a desktop device.
Schedule:Flexible
Term:Up to 36 months
Interest:Processing fee + interest
Lease-to-Own?Yes
Amount:$500 to $10,000
  • ORP range of plus or minus 1000 mV with 1 mV resolution
  • No calibration required for the ORP probe to stay accurate
  • Dual compatibility with optional Bluelab pH probe for combined monitoring
  • 5-year limited warranty
  • View More Details

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  • Free Shipping On Most Items*To the lower 48
  • Transparent PricingBacked w/ price match guarantee
  • 4.8/5 Top Quality Store on Google
  • Secure CheckoutSSL encrypted payments

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THROUGH THE Cultivator's LENS Product Evaluation

  • You are adding ORP monitoring because you want to detect pathogen buildup that standard pH and EC meters miss.
  • You are replacing a failed sensor because your current setup is down and you need to keep your reservoir water clean.

  • The BNC connector lets you swap out a worn probe without buying a whole new meter.
  • You must keep the probe tip in KCl solution since drying out causes the reference to fail.

  • Users who track their disinfection power say they caught nutrient solution contamination long before it affected their plants.
  • Growers who swapped to this meter say the simple, no-calibration ORP setup saved them time compared to their old testers.

Bluelab ORP Meter - Water Quality & Disinfection Monitor

While pH and EC readings tell you about nutrient balance, they say nothing about whether your water is actually clean. Contamination, biofouling, and pathogen growth can quietly undermine a system even when nutrient levels look perfect. The Bluelab ORP Meter closes that gap by directly measuring Oxidation-Reduction Potential — the disinfecting power of your water — so you can catch water quality problems before they cost you a crop.

A replaceable ORP Probe with a BNC connection means a worn sensor doesn't mean replacing the whole meter, and it requires no calibration to stay accurate. A KCl-filled probe cap keeps the probe hydrated between uses, and a 2-metre (6.6ft) cable lets you take readings in reservoirs and tanks that are hard to reach directly.

A higher ORP reading signals a stronger oxidative environment and more effective disinfection against bacteria, algae, and pathogens, making it a key metric for compliance with water quality standards as well as day-to-day system health. For growers who want a fuller picture, the meter offers dual compatibility with a Bluelab pH probe (sold separately), and an auto-off function conserves battery life between checks.

Features

🔬
Replaceable ORP Probe

BNC-connection probe swaps out without replacing the entire meter.

✅
No Calibration Required

The ORP probe stays accurate without a setup step before every use.

💧
KCl-Filled Probe Cap

Keeps the probe hydrated and ready with storage solution between measurements.

📏
2m / 6.6ft Reach Cable

Take readings in hard-to-reach reservoirs and tanks.

🔀
Dual pH Compatibility

Optionally use a Bluelab pH probe (sold separately) for fuller monitoring.

🔋
Auto-Off Function

Conserves battery life automatically between measurements.

What's Included

Specifications

Specification Value
ORP Range ±1000 mV
ORP Resolution 1 mV
ORP Accuracy (at 25°C / 77°F) ±5 mV
pH Range (with optional pH probe, sold separately) 0.0–14.0
pH Resolution 0.1
pH Accuracy (at 25°C / 77°F) ±0.1
Operating Environment Nutrient solution, 32–122°F (0–50°C) — do not use or store outside this range
Power 2x AAA alkaline battery

Support & Manuals

Warranty

The Bluelab ORP Meter is covered by a 5-year limited warranty.

Frequently Asked Questions

What does ORP measure, and why does it matter?+

ORP (Oxidation-Reduction Potential) measures the disinfecting power of your water. A higher reading means a stronger oxidative environment and more effective protection against bacteria, algae, and pathogens.

Does the ORP probe need calibration?+

No. The ORP probe requires no calibration, so you can take accurate readings without a setup step every time.

Can this meter also read pH?+

Yes, with a Bluelab pH probe attached (sold separately), giving you dual pH and ORP monitoring from one meter.

Is the ORP probe replaceable?+

Yes. It uses a BNC connection, so a worn replacement ORP probe can be swapped out without replacing the entire meter.

How far does the probe cable reach?+

The cable measures 2 metres (6.6ft), letting you test reservoirs and tanks that are hard to reach directly.

Why should I monitor ORP alongside pH and EC?+

ORP catches water quality risks like contamination and biofouling that pH and EC readings don't reveal, helping protect equipment and crop yields while supporting water quality compliance.

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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