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Water Testing >> Bluelab Meters and Monitors




Bluelab Guardian Monitor

Bluelab Guardian Monitor

In just one glance the Bluelab Guardian Monitor measures all three critical parameters pH, conductivity and temperature.

The Bluelab Guardian Monitor is a constant indicator of the desired levels of EC/ppm 700/TDS/CF, pH and temperature, The Bluelab Guardian Monitor provides 24 hour continuous reading for pH, conductivity (EC/ppm 700/TDS/CF) and temperature within a solution.

Optimising these critical parameters helps ensure your koi are kept perfect condition.

The Bluelab Guardian Monitor is mains-powered and is mounted to the wall or hung on a support and the probes simply placed into the pond water, filter.


With the Bluelab Guardian Monitor monitoring your water 24 hours a day and with the ability to set high and low alarms, a flashing display indicates if one parameter moves away from the ideal, allowing the required adjustments to be made, quickly and effectively.

Features of Bluelab Guardian Monitor

  • Green LEDs
  • Large easy to read displays
  • No calibration required for conductivity and temperature
  • Simple push button pH calibration
  • Selectable values for conductivity and temperature
  • Flashing high and low alarms
  • Greater tolerance to RF / electronic interference provided
  • Water resistant design
  • International power supply
  • Replaceable double junction pH probe
  • Adjustable display brightness
  • Non-volatile memory - setting retained when power lost.
  • 2 year guarantee for Bluelab Guardian Monitor
  • 6 month guarantee for Bluelab pH Probe
Item # Description Price Add to Cart
MEBLGUABluelab Guardian Monitor225.00 Add to Cart

Bluelab Guardian Monitor Connect

Bluelab Guardian Monitor Connect

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

The Bluelab Guardian Monitor Connect is not only a constant indicator of the desired levels of pH, conductivity, and temperature of your nutrient solution, it also data logs these critical parameters to your computer for you.

It does not stop there. You can access the data via the cloud from a remote mobile device or computer to check for extreme variances to ensure these critical parameters are hitting the mark for crop success.

Just one Bluelab Connect Stick is required to receive wireless data from one or more Guardian Monitor connects.

For remote or cloud access, the computer you are already data logging to will need permanent internet access.

Bluelab Guardian Monitor Connect Features

  • Data logging capability (ONE Bluelab Connect Stick is required, sold separately)
  • Free Bluelab Connect Software available online
  • View data and current status remotely via Google Docs (A computer with permanent internet access is required)
  • Green LEDs
  • Large easy to read display
  • No calibration required for conductivity and temperature
  • Simple push button pH calibration
  • Selectable values for conductivity and temperature
  • Flashing high and low alarms
  • Greater tolerance to RF /electronic interference provided
  • Water resistant design
  • International power supply included
  • Replaceable double junction pH probe included
  • Adjustable display brightness
  • Non-volatile memory
  • Compatible with Bluelab Connect Stick and Bluelab Connect Range Extender
  • 2 year guarantee for Bluelab Guardian Connect
  • 6 month guarantee for Bluelab pH Probe
Item # Description Price Add to Cart
MEBLGUCBluelab Guardian Monitor Connect275.00 Add to Cart

Bluelab Guardian Monitor Connect Inline

Bluelab Guardian Monitor Connect Inline

The Bluelab Guardian Monitor Connect Inline is not only a constant indicator of the desired levels of pH, conductivity, and temperature of your pond water, it also data logs these critical parameters to your computer for you.

It does not stop there. You can access the data via the cloud from a remote mobile device or computer to check for extreme variances to ensure these critical parameters are hitting the mark for growth and health.

Just one Bluelab Connect Stick is required to receive wireless data from one or more Guardian Monitor connects.

For remote or cloud access, the computer you are already data logging to will need permanent internet access.

Bluelab Guardian Monitor Connect Inline Features

  • Easy to use monitor that measures pH, EC, and Temperature direct in return pipework
  • Simple 1 button calibration for pH 7 and pH 4
  • High-pressure pH probe – easy to clean and calibrate
  • Data logs direct to your computer via wireless connection with Bluelab Connect Stick
  • Personalised alarm settings
  • 24/7 monitoring that will Email if anything goes wrong
  • High-pressure in-line pH probe with 3/4′ NPT thread
  • Adapter collar to increase pH probe thread to 1′ NPT
  • Conductivity probe with 1′ NPT thread
  • Probe cable length: 2 meters / 6.5 feet
  • 2 year guarantee for Bluelab Guardian Connect Inline
  • 6 month guarantee for Bluelab pH Probe
Item # Description Price Add to Cart
MEBLGUCIBluelab Guardian Monitor Connect Inline325.00 Add to Cart

Bluelab pH Controller

Bluelab pH Controller

Hands free monitoring and dosing of pH levels. Simple.

It’s known that pH levels can be the difference between just keeping koi alive or keeping koi that thrive .

Measuring and adjusting pH levels constantly can be very time-consuming.

The Bluelab pH Controller automatically monitors and fine-tunes pH levels.

It needs only to be simply set and the pH is taken care of.

Bluelab pH Controller Features

  • Automatic control and monitoring of pH
  • Green back lite LCD with adjustable brightness
  • Large, easy to read displays
  • Easy to navigate menu to program and adjust settings
  • Simple push button pH calibration with on screen guide
  • Flashing high / low alarm with control lockouts
  • Dosing lockouts to protect from over-dosing
  • Auto resume dosing on restart after power loss
  • Water resistant, wall mount design
  • 13 foot (4 meter) acid/alkali resistant dosing tube supplied
  • Use with undiluted Bluelab pH Up or Down
  • International power supply
  • Replaceable double junction pH probe
  • Separate Bluelab Temperature Probe (for pH ATC)
  • Replaceable peristaltic pump and tubes
  • 2 year guarantee for Bluelab pH Controller and Bluelab Temperature Probe
  • 6 month guarantee for Bluelab pH Probe
Item # Description Price Add to Cart
MEBLPHCBluelab pH Controller335.00 Add to Cart

Bluelab pH Controller Connect

Bluelab pH Controller Connect

Clever monitoring, dosing and data logging of pH levels. Made easy.

Better knowledge can make a world of difference when it comes to managing the pH.

The intelligent pH Controller Connect constantly monitors and fine-tunes pH levels automatically.

But more than that, via a wireless connection it can log data to a computer too, giving continuous information to the koi keeper.

The data can be used to make system changes faster and the settings can be changed from the PC.

Bluelab pH Controller Connect Features

  • ONE Bluelab Connect Stick is required, sold separately
  • Local and Cloud data logging capability
  • Adjustment of control settings from a local PC via Bluelab Connect Software
  • Option to view data and current status remotely via Google Docs™
  • Automatic control and monitoring of system pH
  • Green back lit LCD with adjustable brightness
  • Large, easy to read displays
  • Easy to navigate menu to program and adjust settings
  • Simple push button pH calibration with on screen guide
  • Dosing lockouts to protect from over-dosing
  • Auto resume dosing on restart after power loss
  • Water resistant, wall mount design
  • 13 foot (4 meter) acid/alkali resistant dosing tube supplied
  • International power supply
  • Replaceable double junction pH probe
  • Separate Bluelab Temperature Probe (for pH ATC)
  • Replaceable peristaltic pump and tubes
  • Purchase only ONE Connect Stick: Just one Bluelab Connect Stick is required to receive wireless data from one or more connect devices.
  • These are sold separately.
  • 2 year guarantee for Bluelab pH Controller Connect and Bluelab Temperature Probe
  • 6 month guarantee for Bluelab pH Probe
Item # Description Price Add to Cart
MEBLPHCCBluelab pH Controller Connect370.00 Add to Cart

Bluelab Pro Controller Connect

Bluelab Pro Controller Connect

Full control of pH, conductivity and temperature in one place with the Bluelab Pro Controller Connect.

When connected to a dosing system the Bluelab Pro Controller Connect manages pH, conductivity and temperature levels. As your water, pH and temps are automatically adjusted to the desired range.

Monitor, data log and control your system in real time for immediate response to personalised settings and system alerts, direct from your computer.

Bluelab Pro Controller Connect Features

  • Control pH, conductivity and temperature when connected to a doser
  • Easy to navigate menu to program and adjust settings
  • ONE Bluelab Connect Stick is included
  • Data logging capability (download free Bluelab® Connect Software™ online)
  • Remote viewing with Bluelab® Connect™ Software and Apps
  • Bright, green LED with adjustable brightness
  • Simple pH calibration with on screen instructions
  • High and low alarm control lockouts
  • Auto resume dosing on restart after power loss
  • Dosing lockouts to protect from over-dosing
  • Replaceable Bluelab probes
  • Use Bluelab PowerPod to connect to other mains operated dosers and/or heating or cooling devices
  • 2 year guarantee for Bluelab Pro Controller
  • 6 month guarantee for Bluelab pH Probe
Item # Description Price Add to Cart
MEBLPCKBluelab Pro Controller Connect1925.00 Add to Cart

Bluelab Combo Meter

Bluelab Combo Meter

The Bluelab Combo Meter is a portable pH, conductivity and temperature meter all in one. The Bluelab Combo Meter will soon tell you if each parameter is within the desired requirements. Adjustments can be quickly made to get your pond back on track.

The Bluelab Combo Meter has two probes, a Bluelab pH Probe and a Bluelab Conductivity/Temperature Probe. When taking a reading, simply place them into the solution and the selected reading is displayed on screen. As the Bluelab Combo Meter is portable and does not require a power supply to operate, it can be used anywhere, anytime to help you manage your water parameters.

Calibration of the pH probe is simple as instructions are supplied on the back of the meter and the easy push button method makes this one of the simplest meters to use.

The pH probe is replaceable so you can use this meter for years to come. The Conductivity/temperature probe does not require calibration as this is locked in during manufacture.

The Bluelab Combo Meter is all that is needed for simple and reliable pond water management and it’s all within arm’s reach! The Bluelab Combo Meter is an all-in-one pH, conductivity and temperature meter.

Calibration of the pH is simple with the push buttons on the meter and fresh calibration solutions.

The Bluelab Combo Meter Features

  • Measures pH, conductivity/nutrient (EC, CF, ppm 500 and ppm 700) and temperature (°C, °F)
  • Lightweight and portable
  • Large easy to read display
  • Simple push button pH calibration
  • Successful pH calibration indicator
  • No calibration required for conductivity and temperature
  • Replaceable double junction pH probe
  • Over range and under range indicators
  • Low battery indicator
  • 2 x AAA alkaline batteries included
  • Auto off function
Item # Description Price Add to Cart
MEBLCOMBluelab Combo Meter180.00 Add to Cart

Bluelab pH Meter

Bluelab pH Meter

When measuring the pH of a solution is important… reach for the Bluelab pH Meter.

The Bluelab pH Meter is used to accurately measure the pH value of a solution.

Simply place the Bluelab pH probe into the solution and the reading will be displayed on the screen.

As the meter is portable and does not need a power supply to operate, it can be used anywhere and anytime to help you manage your water requirements.


Calibration is simple with the push buttons on the meter and fresh Bluelab calibration solutions.

Bluelab pH Meter Features

  • Lightweight and portable
  • Large easy to read display
  • Simple push button pH calibration
  • Replaceable double junction pH probe included
  • Successful pH calibration indicator
  • Over range and under range indicators
  • 2 x AAA alkaline batteries included
  • Auto off function
  • Low battery indicator

Calibration of the pH is simple with the push buttons on the meter and fresh calibration solutions.


Calibration of the pH probe is simple as instructions are supplied on the back of the meter and the easy push button method makes this one of the simplest meters to use.

The pH probe is replaceable so you can use this meter for years to come.
Item # Description Price Add to Cart
MEBLPHMBluelab pH Meter135.00 Add to Cart

Bluelab pH Pen

Bluelab pH Pen

The ultimate handy solution for measuring pH and temperature.

koi get their nutrient from minerals but they can only get all the right minerals they need if certain conditions are right. Think of nutrients like a lock. pH is the key. A key factor that affects food uptake is whether your solution is acid or alkaline. We measure this in pH.

The Bluelab pH Pen also measures the temperature of the solution.

The hand held pH pen provides a compact quick and handy way to manage the success of your water/koi to ensure maximum uptake of nutrients.

Teamed with our Bluelab ppm or EC Pen, you have a handy, convenient and accurate system for ensuring optimum growth and health.

Bluelab pH Pen Features

  • Measures pH and temperature
  • Selectable units for temperature
  • Backlit LCD display
  • Double junction probe (not replaceable)
  • Successful pH calibration indicator
  • Hold reading function
  • Low battery indicator
  • Fully waterproof
  • Auto off function
  • Automatic temperature compensation
  • 1 x AAA alkaline battery included

pH Probe cleaning is one of the most important parts of owning or operating any Bluelab meter, monitor or controller.

If the probe is contaminated or dirty, it affects the accuracy of the reading displayed. pH probes are scientific instruments and should be cleaned and calibrated regularly to extend their life.

Item # Description Price Add to Cart
MEBLPHPBluelab pH Pen75.00 Add to Cart

Bluelab EC Pen

Bluelab EC Pen

The ultimate handy solution for measuring conductivity (EC or ppm) and temperature!

The Bluelab EC Pen is the latest innovation for hand held-conductivity meters. It provides a compact, quick and handy way to manage your water.


The Bluelab EC Pen shows that the water have the right amount of nutrient in the solution and indicates if adjustments are needed.

Display options available in °C, °F, EC, CF, ppm 500 and ppm 700.

Teamed with our Bluelab pH Pen, you have a handy, convenient and accurate system for ensuring optimum growth and health.


Bluelab EC Pen Features

  • Measures conductivity and temperature
  • Selectable units for conductivity and temperature
  • Backlit LCD display
  • Calibration optional
  • Successful calibration indicator
  • Hold function
  • Low battery warning
  • Fully waterproof
  • Auto off function
  • Automatic temperature compensation

Cleaning and calibrating at least monthly will help maintain accurate readings. Accurate readings simplify pond management and provide improved growth.

Bluelab calibration, conductivity and storage solutions are a must in every koi keepers toolbox.

Item # Description Price Add to Cart
MEBLECPBluelab EC Pen55.00 Add to Cart

Bluelab Replacement pH Probe

Bluelab Replacement pH Probe

A replacement probe for Bluelab Combo and pH Meters, and Guardian Monitors

The Bluelab pH Probe is a replacement pH probe (electrode) suitable for use with Bluelab products that test the pH value of a solution.

pH probes do not last forever as they age through normal use and will eventually fail.

With good care and use (keeping the probe tip moist and cleaning once a month) its life will be extended.

The Bluelab pH Probe has a double junction reference providing longer life and is a gel-filled non-refillable probe, so it is maintenance-free.

Bluelab pH Probe Features

  • Easy to clean
  • Gel filled (non-refillable)
  • Double junction
  • Waterproof cable joint
  • Probe holder included – keeps probe secure
  • Quality BNC connection
  • 2 metre / 6.56 foot standard cable

Replace only the pH probe, not the whole meter!

pH Probe cleaning is one of the most important parts of owning or operating any Bluelab meter, monitor or controller.

If the probe is contaminated or dirty, it affects the accuracy of the reading displayed. pH probes are scientific instruments and should be cleaned and calibrated regularly to extend their life.

Item # Description Price Add to Cart
MEBLPMP2MCBluelab Replacement pH Probe50.00 Add to Cart

Bluelab Carry Case

Bluelab Carry Case

The Bluelab Carry Case provides a custom fit so the Bluelab Meter can be used and read right from the carry case.

The Bluelab Carry Case has a firm outer casing which offers impact resistance for your Meter.

There are two pockets in the top of the case specially made for the probes.

A removable and adjustable shoulder strap provides even more comfort and convenience. Place over the shoulder, hold onto the carry case and place the probes into the testing solution/pond.


In-between use we recommend placing dry probes into the pockets. Simply zip up the Carry Case then tuck it away safely for storage or transport.


Bluelab Carry Case Features:

  • Firm outer casing for impact resistance
  • Two custom pockets to insert Bluelab Probes
  • Internal strap to tuck probe cables away tidily
  • Net pocket for Meter to sit in and strap to hold in place
  • Strong nylon strap with adjustable length
  • ‘D’ hook at top of outer case for hanging

Ideal for use with the following Bluelab Meters

  • Bluelab Combo Meter
  • Bluelab pH Meter
  • Bluelab pH and ppm Pens

Note: The Bluelab Carry Case does not come with a meter.

The Bluelab Carry Case provides a custom fit so a Bluelab meter can be used and read right from the Carry Case. A  firm outer casing offers impact resistance for the meter. There are two pockets in the top of the case specially made for the probes.

Also suitable for the Bluelab pH Meter, Bluelab Soil pH Meter and Bluelab pH and EC pens.

Item # Description Price Add to Cart
MEBLCCBluelab Carry Case20.00 Add to Cart

Bluelab Probe Care kit pH

Bluelab Probe Care kit pH

The instrument is only as accurate as the probe is clean.

pH Probe cleaning is one of the most important parts of owning or operating any Bluelab meter, monitor or controller.

If the probe is contaminated or dirty, it affects the accuracy of the reading displayed. pH probes are scientific instruments and should be cleaned and calibrated regularly to extend their life.

The probe surface is where the instrument takes the reading of the solution. The information is sent back from the probe to the electronic brain of the instrument.

A calculation is then done in the instrument’s brain or micro-computer and a reading is then displayed. If the information sent back from the probe is inaccurate due to probe surface contamination then the reading will be inaccurate.

Cleaning the pH probe is a very easy task, which will prolong its life.

  • Cleaning instructions inside box lid
  • 500ml pH4.0 and pH7.0 Calibration solutions
  • Decanter vessels
  • Bluelab pH Probe Cleaner
  • Toothbrush (probe cleaning instrument)

pH Probe cleaning is one of the most important parts of owning or operating any Bluelab meter, monitor or controller.

If the probe is contaminated or dirty, it affects the accuracy of the reading displayed.

pH probes are scientific instruments and should be cleaned and calibrated regularly to extend their life.

Item # Description Price Add to Cart
MEBLPHCKBluelab Probe Care kit pH15.00 Add to Cart

Bluelab Probe Care Kit Conductivity

Bluelab Probe Care Kit ConductivityThe 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 meter, monitor or controller.

If the probe is contaminated or dirty, it affects the accuracy of the reading displayed. The Bluelab Conductivity Probes read low when the probe is contaminated.

The probe surface is where the instrument takes the reading of the solution. The information is sent back from the probe to the electronic brain of the instrument.


A calculation is then done in the instrument’s brain or micro-computer and a reading is then displayed.

If the information sent back from the probe is inaccurate due to probe surface contamination then the reading will be inaccurate.


Cleaning the conductivity probe is a very easy task and prolongs its life.


  • Cleaning instructions inside box lid
  • 500ml 2.77 EC Conductivity Standard Solution
  • Decanter vessel
  • Bluelab Conductivity Probe Cleaner
  • Bluelab Chamois
  • Probe cleaning instrument
Item # Description Price Add to Cart
MEBLCCKBluelab Probe Care Kit Conductivity15.00 Add to Cart