Replacement Probes, Electrodes & Testing Accessories

National Hydro Group is your online source for Replacement Probes, Electrodes & Testing Accessories. If you cant find the Replacement Probes, Electrodes & Testing Accessories that meet your needs please give us a ring or send a quick email so we can help you find exactly what you're looking for.
Bluelab pH Controller Connect-NWGSupply.com
Save 27%
$629.00
$459.10

Bluelab pH Controller Connect

BlueLab

Clever monitoring, dosing and data logging of solution pH levels. Made easy. Sometimes the more you know, the better. And when it comes to managing...

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$629.00
$459.10
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Bluelab Probe Care Kit - pH-NWGSupply.com
Save 10%
$16.50
$14.85

Bluelab Probe Care Kit - pH

BlueLab

Everything you need to clean, hydrate and calibrate pH probes. Probe cleaning and correctly storing pH probes ensures you get the most accurate rea...

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$16.50
$14.85
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Bluelab Combo Replacement pH Probe-NWGSupply.com
Save 16%
$70.00
$58.80

Bluelab Combo Replacement pH Probe

BlueLab

The Bluelab pH Combo Probe serves as a replacement for the same essential component found in our reliable Bluelab Combo Meter. Probe is covered by ...

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$70.00
$58.80
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pH Electrode Probe w/ 2m (6.6') Cable for HI981404N & H-NWGSupply.com
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$78.99
$66.35

pH Electrode Probe w/ 2m (6.6') Cable for HI981404N & H

Hanna

pH electrode with 2 m (6.6') cable for HI981401N, HI981404N, & HI9815047. Why keep a spare electrode on hand? Always have an extra in case of b...

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$78.99
$66.35
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Bluelab Inline pH Probe (Replacement Probe Guardian Monitor Connect In-Line)-NWGSupply.com
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$180.00
$146.44

Bluelab Inline pH Probe (Replacement Probe Guardian Monitor Connect In-Line)

BlueLab

The Bluelab Guardian Monitor Connect Inline is not only a constant indicator of the desired levels of pH, conductivity and temperature of your nutr...

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$180.00
$146.44
Save 19%
Bluelab pH Controller Power Supply-NWGSupply.com
Save 0%
$35.00
$34.86

Bluelab pH Controller Power Supply

BlueLab

Hands-free monitoring and dosing of solution pH levels. Our clever pH controller automatically monitors and fine-tunes the pH levels for you. You s...

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$35.00
$34.86
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Bluelab Connect Stick-NWGSupply.com
Save 15%
$151.70
$129.53

Bluelab Connect Stick

BlueLab

The Bluelab Guardian Monitor Connect, Bluelab Connect Stick, Bluelab Connect Range Extender and Bluelab Connect Software. The Bluelab Guardian Moni...

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$151.70
$129.53
Save 15%
Bluelab Replacement pH Probe-NWGSupply.com
Save 16%
$70.00
$58.80

Bluelab Replacement pH Probe

BlueLab

The Bluelab Combo Meter is a conductivity, pH and temperature meter all in one. As the Bluelab Combo Meter is portable and does not require a power...

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$70.00
$58.80
Save 16%
Bluelab Carry Case-NWGSupply.com
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$25.00
$21.00

Bluelab Carry Case

BlueLab

The Bluelab Carry Case provides a custom fit so you can use and read your Bluelab Meter right from the carry case. A firm outer casing offers impac...

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$25.00
$21.00
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Replacement Probe for MW801 & MW802 ONLY-NWGSupply.com
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$112.99
$91.52

Replacement Probe for MW801 & MW802 ONLY

Milwaukee Instruments

Combination Probe For pH/EC/TDS with 1 meter cable ** FOR NEW STYLE MIMW802 UNITS ONLY, NOT MISM802

$112.99
$91.52
Save 19%
Replacement pH Sensor PH-200-NWGSupply.com
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$49.95
$41.96

Replacement pH Sensor PH-200

HM Digital

This spare pH sensor is for HM Digital Waterproof pH Meter model P-200. Features Glass pH sensor and reference tube and thermister.

$49.95
$41.96
Save 16%
pH Controller 115V-NWGSupply.com
Save 19%
$235.99
$192.26

pH Controller 115V

Hanna

This pH controller has been designed for easy, affordable installation in tight spaces, ideal for simple and effective process control. The unit is...

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$235.99
$192.26
Save 19%
Bluelab Meter Carry Case-NWGSupply.com
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$25.00
$21.00

Bluelab Meter Carry Case

BlueLab

Bluelab is excited to introduce a new accessory which makes transporting and using their Meters even easier! The Bluelab Carry Case provides a cust...

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$25.00
$21.00
Save 16%
Bluelab Guardian Monitor Power Supply-NWGSupply.com
Save 16%
$22.60
$19.04

Bluelab Guardian Monitor Power Supply

BlueLab

Power supply unit with international plug adaptors for North America, Australia/New Zealand, UK and Europe.Designed specifically for use with the B...

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$22.60
$19.04
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Bluelab® Pulse Meter-NWGSupply.com
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$299.00
$249.95

Bluelab® Pulse Meter

BlueLab

Introducing Pulse, a new innovation, designed, and made in NZ by Bluelab®. The first of its kind, a 3 in 1 Multimedia EC/MC Meter that connects di...

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$299.00
$249.95
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Sure Test Commercial Lab Meter Replacement ORP Probe-NWGSupply.com
Save 8%
$199.99
$183.95

Sure Test Commercial Lab Meter Replacement ORP Probe

Sure Test

The Sure Test® Commercial Lab Meter has the ability to measure Oxidation Reduction Potential (ORP) with the optional ORP probe. This is very useful...

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$199.99
$183.95
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Sure Test Commercial Replacement DO Probe-NWGSupply.com
Save 31%
$143.95
$98.95

Sure Test Commercial Replacement DO Probe

Sure Test

The Sure Test® Commercial Multi-Meter DO Probe allows for easy measurement of dissolved oxygen. For use with the Sure Test® Commercial Multi-Meter ...

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$143.95
$98.95
Save 31%
Sure Test Pro pH Pen w/ Replaceable Probe +/- 0.05 ATC-NWGSupply.com
Save 25%
$119.95
$89.95

Sure Test Pro pH Pen w/ Replaceable Probe +/- 0.05 ATC

Sure Test

The Sure Test® Pro pH Pen has a replaceable pH probe (716396) and a larger display than other Sure Test® pH pens. Reads both pH and temperature (F°...

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$119.95
$89.95
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Bluelab Leap pH Probe (Probe Only)-NWGSupply.com
Save 17%
$120.00
$99.95

Bluelab Leap pH Probe (Probe Only)

BlueLab

The perfect, portable way to accurately measure and monitor pH levels in a wide range of media. We have combined the Bluelab® Multimedia pH Meter a...

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$120.00
$99.95
Save 17%
Bluelab pH Probe Care Kit-NWGSupply.com
Save 10%
$16.95
$15.26

Bluelab pH Probe Care Kit

BlueLab

$16.95
$15.26
Save 10%
Bluelab Conductivity Probe Care Kit-NWGSupply.com
Save 10%
$11.90
$10.76

Bluelab Conductivity Probe Care Kit

BlueLab

The instrument is only as accurate as the probe is clean. Probe cleaning is one of the most important parts of owning or operating any Bluelab mete...

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$11.90
$10.76
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Batteries for PRO pH/TDS pen or Thirsty Light, 1.4V (pack of 4 batteries)-NWGSupply.com
Save 4%
$6.95
$6.69

Batteries for PRO pH/TDS pen or Thirsty Light, 1.4V (pack of 4 batteries)

Hydrofarm

Hydrofarm's 3 gallon black bucket. Buckets can be the true building blocks of your indoor hydroponics setup or outdoor garden. They're an ideal way...

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$6.95
$6.69
Save 4%
24-7 pH Replacement Probe-NWGSupply.com
Save 16%
$59.95
$50.33

24-7 pH Replacement Probe

Rose City

A great all around meter for nutrient applications needing constant monitoring. It measures PPM, pH and Temperature. Its large illuminated green LC...

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$59.95
$50.33
Save 16%