What does the Garden King Everyday pH Pen measure?
The Garden King Everyday pH Pen measures the pH of liquids, allowing growers to check how acidic or alkaline their nutrient solution or irrigation water is.
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Simple, budget-friendly digital pH pen for checking the acidity or alkalinity of nutrient solutions and irrigation water.
The Garden King Everyday pH Pen is an easy-to-use handheld meter for growers who want a straightforward way to keep an eye on nutrient solution pH without investing in a more advanced meter.
Designed as an entry-level pH pen, it is suitable for beginners as well as more experienced growers looking for a cost-effective meter for everyday checks or shorter-term growing projects.
Monitoring pH is an important part of nutrient management. Regular testing gives growers the information needed to identify when a nutrient solution is too acidic or too alkaline before making any required adjustments.
Why choose the Garden King Everyday pH Pen?
- Simple digital pH testing – provides an easy way to check the pH of nutrient solutions and irrigation water.
- Ideal entry-level meter – a straightforward option for growers getting started with digital pH monitoring.
- Budget-friendly choice – useful when you need basic pH measurement without the cost of a premium meter.
- Suitable for experienced growers too – a practical option for everyday checks, spare equipment and shorter-term grows.
- Compact handheld design – easy to keep alongside your nutrient mixing and reservoir equipment.
- Easy to operate – immerse the probe in the solution and allow the displayed reading to stabilise.
What is the Garden King pH Pen suitable for?
The Garden King Everyday pH Pen is designed for checking liquid pH and is particularly useful when preparing nutrient solutions for hydroponic and horticultural growing systems.
It provides a convenient way to monitor nutrient reservoirs, irrigation water and freshly mixed feeds so growers can make informed decisions about pH management.
How to use the Garden King Everyday pH Pen
Remove the protective cap and switch the pH pen on. Immerse the measuring probe in the nutrient solution or water being tested and allow the displayed value to stabilise before recording the result.
Once testing is complete, rinse the probe and replace the protective cap. Regular calibration checks using an appropriate pH calibration solution are recommended to help maintain reliable readings over time.
Take pH readings before making adjustments to a nutrient solution and test again after any adjustment has been thoroughly mixed through the reservoir.
Product details
| Brand | Garden King |
|---|---|
| Product | Everyday pH Pen |
| Product type | Digital handheld pH meter |
| Measurement | pH |
| Display | Digital |
| Design | Handheld pen meter |
| Typical applications | Nutrient solutions, irrigation water & hydroponic growing |
Garden King Everyday pH Pen FAQs
Is the Garden King pH Pen suitable for hydroponics?
Yes. It is a practical entry-level meter for checking nutrient solution and irrigation water pH in hydroponic growing systems.
Is the Garden King Everyday pH Pen suitable for beginners?
Yes. The Everyday pH Pen is designed as an easy-to-use entry-level meter, making it particularly suitable for growers who are new to digital pH testing.
How do I take a pH reading?
Switch the meter on, immerse the probe in the liquid being tested and allow the displayed reading to stabilise. Rinse the probe after testing and replace the protective cap.
Does the Garden King pH Pen need calibrating?
Regular calibration checks are recommended to help maintain reliable pH readings. Use an appropriate pH calibration solution and follow the calibration procedure for the meter.
Why should I measure the pH of a nutrient solution?
Measuring pH tells you whether your nutrient solution is acidic or alkaline. This allows you to monitor the solution and make appropriate pH adjustments as part of your nutrient management routine.
Can I use the Garden King pH Pen for everyday checks?
Yes. It is designed as a straightforward, budget-friendly meter for routine pH checks and is also useful for shorter-term growing projects.
Is this a pH and EC meter?
No. The Garden King Everyday pH Pen is intended for pH measurement. EC measurement requires a suitable EC or conductivity meter.
Bluelab Conductivity Probe Care Kit – EC Meter Cleaning & Maintenance
750
£7.50
Unit price per
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Bluelab Conductivity Probe Care Kit – EC Meter Cleaning & Maintenance
750
£7.50
Unit price per
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Complete Bluelab care kit for cleaning, maintaining and checking conductivity probes to help keep EC readings accurate and dependable.
The Bluelab Conductivity Probe Care Kit brings together the essential equipment needed to look after Bluelab EC and conductivity probes. Regular cleaning helps remove the nutrient salts, mineral deposits and other residue that can build up on a conductivity sensor during normal use.
Keeping the probe clean is important because contamination can cause EC or ppm readings to become inaccurate, fluctuate or respond differently than expected. The kit includes Bluelab Conductivity Probe Cleaner and a dedicated chamois for cleaning the probe face, along with 2.77 EC Conductivity Standard Solution for checking its performance afterwards.
It is a useful maintenance kit for growers relying on conductivity measurements to monitor nutrient strength, whether using a handheld Bluelab meter or a compatible conductivity probe connected to a monitoring or control system.
Why use the Bluelab Conductivity Probe Care Kit?
- Complete EC probe maintenance kit – includes the key equipment needed to clean and check compatible Bluelab conductivity probes.
- Helps maintain accurate readings – regular cleaning removes deposits that can interfere with conductivity measurements.
- Includes 2.77 EC standard solution – check probe performance against a known conductivity standard after cleaning.
- Dedicated conductivity probe cleaner – formulated for cleaning the probe face as part of routine maintenance.
- Includes Bluelab cleaning chamois – used to clean the conductivity probe face thoroughly.
- Suitable for routine maintenance – ideal for growers who regularly depend on EC or ppm readings when managing nutrient solutions.
What is included in the Bluelab Conductivity Probe Care Kit?
The kit contains Bluelab Conductivity Probe Cleaner, a conductivity probe cleaning chamois, two single-use sachets of Bluelab 2.77 EC Conductivity Standard Solution, a plastic cup and probe care instructions.
Together, these provide what you need to clean the conductivity sensor and then check its performance using the supplied EC standard solution.
How to clean a Bluelab conductivity probe
Remove the conductivity probe shroud as directed for your Bluelab meter or probe. Apply one or two drops of Conductivity Probe Cleaner to the probe face and rub firmly using the supplied Bluelab chamois.
Rinse the probe face thoroughly under running tap water while continuing to clean it with the chamois. A properly cleaned probe face should allow water to form an even film rather than separate beads. If water continues to bead on the surface, repeat the cleaning process.
Refit the probe shroud and place the probe into fresh 2.77 EC Conductivity Standard Solution. Allow the reading to stabilise before checking the result. This provides a useful indication that the conductivity probe has been cleaned effectively.
Product details
| Brand | Bluelab |
|---|---|
| Product | Probe Care Kit – Conductivity |
| Product type | Conductivity / EC probe cleaning and maintenance kit |
| Measurement type | Conductivity (EC / ppm) |
| Conductivity standard | 2.77 EC |
| Standard solution quantity | 2 x single-use sachets |
| Probe cleaner | Bluelab Conductivity Probe Cleaner |
| Cleaning accessory | Bluelab chamois |
| Also included | 1 x plastic cup & probe care instructions |
| Purpose | Cleaning, maintenance & performance checking of compatible Bluelab conductivity probes |
Bluelab Conductivity Probe Care Kit FAQs
What is the Bluelab Conductivity Probe Care Kit used for?
It is designed for cleaning and maintaining compatible Bluelab conductivity probes and checking their performance using 2.77 EC Conductivity Standard Solution.
Why should I clean my Bluelab EC probe?
Nutrient salts, minerals and other deposits can accumulate on the conductivity sensor during use. Cleaning removes this build-up and helps the probe continue to provide dependable EC or ppm readings.
How often should I clean my Bluelab conductivity probe?
Bluelab recommends checking and cleaning conductivity probes around once a month for best results. Cleaning is also worthwhile if readings appear incorrect, fluctuate unexpectedly or are lower than expected.
What is the 2.77 EC solution used for?
The supplied 2.77 EC Conductivity Standard Solution provides a known reference value for checking the conductivity probe after cleaning.
Does the kit include conductivity probe cleaner?
Yes. Bluelab Conductivity Probe Cleaner is included along with a dedicated chamois for cleaning the probe face.
Can I use this kit with a Bluelab Truncheon?
Yes. Bluelab specifies this cleaning procedure and care kit for its Truncheon nutrient meters as well as a range of other Bluelab conductivity probes.
Does this kit maintain pH probes as well?
No. This is the conductivity-specific Probe Care Kit. Bluelab offers separate pH and combined pH and Conductivity care kits for growers who also need to maintain pH probes.
Do Bluelab conductivity probes need calibrating?
Bluelab conductivity equipment is factory calibrated, and calibration requirements vary by instrument. Routine cleaning followed by checking the probe in fresh 2.77 EC standard solution is the key maintenance procedure. Certain Bluelab instruments can be recalibrated if necessary.
Bluelab OnePen – pH, EC & Temperature Meter
11500
£115.00
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Bluelab OnePen – pH, EC & Temperature Meter
11500
£115.00
Unit price per
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Professional 3-in-1 handheld meter for measuring pH, EC and temperature from a single replaceable probe.
The Bluelab OnePen brings three of the most important nutrient solution measurements together in one compact meter. Instead of switching between separate pH and conductivity pens, growers can measure pH, electrical conductivity and temperature with one handheld device.
A bright backlit display can show pH and EC readings simultaneously, making routine reservoir and nutrient checks quicker and easier. The OnePen also offers automatic temperature compensation, multiple conductivity measurement scales and a probe health indicator to help growers stay on top of meter maintenance.
Built-in Bluetooth connectivity allows the OnePen to connect with Edenic by Bluelab, adding digital recording, real-time data sharing and access to measurement history for growers who want more than a simple spot-check meter.
Why choose the Bluelab OnePen?
- 3-in-1 measurement – measure pH, conductivity and temperature with a single handheld meter.
- Simultaneous pH and EC readings – view both key nutrient solution measurements together on the backlit display.
- Replaceable probe – the combined pH, conductivity and temperature probe can be replaced separately rather than replacing the complete meter.
- 0.01 pH resolution – provides precise pH measurements across a 0.0 to 14.0 pH range.
- Multiple conductivity scales – select EC, mS/cm, CF, ppm 500 (TDS) or ppm 700.
- Automatic temperature compensation – compensates measurements for changes in solution temperature.
- Bluetooth connectivity – connect to Edenic by Bluelab for digital data management and real-time measurement sharing.
- IP68 rated – designed with dust and waterproof protection for demanding growing environments.
- Probe health indicator – helps you keep track of the condition of the replaceable probe.
What does the Bluelab OnePen measure?
The Bluelab OnePen measures pH, electrical conductivity and temperature in nutrient solutions. Together, these readings give growers a clearer picture of the conditions around the root zone and help with day-to-day nutrient management.
Conductivity can be displayed as EC, mS/cm, CF, ppm 500 (TDS) or ppm 700, while temperature can be displayed in either °C or °F. This makes the OnePen suitable for growers working with different nutrient programmes and conductivity scales.
Designed for nutrient solution monitoring
The OnePen is suitable for checking hydroponic nutrient solutions, reservoirs, runoff and source water. Its combination of pH, EC and temperature measurement makes it particularly useful where growers would otherwise need separate meters to monitor their solution.
The compact handheld format works equally well for regular grow-room checks and professional crop management, while Edenic connectivity gives commercial growers and data-focused users the option to record and manage measurements digitally.
How to use the Bluelab OnePen
Before first use, hydrate the pH bulb in Bluelab KCl Storage Solution for 24 hours and complete the required pH calibration using fresh pH 7.0 and pH 4.0 calibration solutions.
Switch the OnePen on and select the required measurement mode. Available modes include EC/pH, pH/temperature and EC/temperature. Place the probe into the nutrient solution and allow the readings to stabilise.
After use, rinse the probe with fresh tap water and keep the storage-cap sponge moist with Bluelab KCl Storage Solution. Regular cleaning and calibration will help maintain dependable measurements and extend the useful life of the replaceable probe.
Product details
| Brand | Bluelab |
|---|---|
| Product | OnePen |
| Product type | 3-in-1 handheld pH, EC & temperature meter |
| Measurements | pH, conductivity (EC) & temperature |
| pH range | 0.0 – 14.0 pH |
| pH resolution | 0.01 pH |
| pH accuracy | ±0.05 at 25°C |
| EC range | 0 – 10 EC / mS/cm |
| EC resolution | 0.01 |
| EC accuracy | ±0.1 at 25°C |
| Conductivity units | EC, mS/cm, CF, ppm 500 (TDS) & ppm 700 |
| Temperature range | 0 – 50°C / 32 – 122°F |
| Temperature resolution | 0.1°C / 0.1°F |
| Temperature accuracy | ±1°C / ±1°F |
| Temperature compensation | Automatic |
| Probe | Replaceable combined pH, conductivity & temperature probe |
| pH probe type | Double-junction |
| Conductivity electrodes | Titanium |
| Waterproof rating | IP68 |
| Connectivity | Bluetooth with Edenic by Bluelab |
| Power | 2 x AAA alkaline batteries |
What's included?
| Meter | 1 x Bluelab OnePen with replaceable pH, conductivity & temperature probe |
|---|---|
| Cleaning accessory | 1 x Bluelab Sensor Cleaning Brush |
| Calibration solution | 1 x Bluelab pH 7.0 Calibration Solution sachet |
| Calibration solution | 1 x Bluelab pH 4.0 Calibration Solution sachet |
| Storage solution | 1 x Bluelab KCl Storage Solution sachet |
Bluelab OnePen FAQs
What does the Bluelab OnePen measure?
The Bluelab OnePen measures pH, electrical conductivity and temperature, combining three important nutrient solution measurements in one handheld meter.
Can the Bluelab OnePen measure pH and EC at the same time?
Yes. The OnePen can display pH and conductivity readings simultaneously, allowing growers to check both measurements without switching between separate meters.
What is the maximum EC reading of the Bluelab OnePen?
The OnePen has a conductivity measurement range of 0 to 10 EC. It can also display conductivity as mS/cm, CF, ppm 500 (TDS) or ppm 700.
Does the Bluelab OnePen measure temperature?
Yes. It measures solution temperature from 0 to 50°C, or 32 to 122°F, with selectable Celsius and Fahrenheit units.
Is the Bluelab OnePen waterproof?
Yes. The OnePen has an IP68 dust and waterproof rating.
Does the Bluelab OnePen have a replaceable probe?
Yes. The combined pH, conductivity and temperature probe is replaceable, allowing the sensing element to be renewed without replacing the complete meter.
Does the Bluelab OnePen connect to a phone?
Yes. Built-in Bluetooth allows the OnePen to connect to Edenic by Bluelab for real-time data sharing, measurement history and software updates.
Does the Bluelab OnePen need calibrating?
Yes. The pH probe uses two-point calibration with pH 7.0 and pH 4.0 calibration solutions. The EC sensor is factory calibrated but can also be recalibrated when required using 2.77 EC calibration solution.
How should I store the Bluelab OnePen?
Rinse the probe with fresh tap water after use and keep the sponge inside the storage cap moist with Bluelab KCl Storage Solution. The pH bulb should not be allowed to dry out.
How often should I clean the Bluelab OnePen probe?
Bluelab recommends gently cleaning both the EC electrodes and pH bulb every 30 days, followed by pH calibration and an EC performance check.
Bluelab OnePen Replacement Probe – pH, EC & Temperature
4500
£45.00
Unit price per
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Bluelab OnePen Replacement Probe – pH, EC & Temperature
4500
£45.00
Unit price per
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Genuine Bluelab replacement probe for restoring pH, EC and temperature measurement on the Bluelab OnePen without replacing the complete meter.
The Bluelab OnePen Replacement Probe is the dedicated replacement sensor for the Bluelab OnePen. It combines pH, electrical conductivity and temperature sensing in a single replaceable module, allowing you to renew the measuring end of your OnePen while continuing to use the existing meter body.
Like the original OnePen probe, the replacement uses a double-junction pH sensor alongside titanium conductivity electrodes. Once fitted, it restores the OnePen's ability to measure pH, EC and temperature from the same handheld meter.
Replacing the probe is particularly useful when an older sensor is becoming difficult to calibrate, giving unstable readings or has reached the end of its working life. It provides a more economical and sustainable alternative to replacing the complete OnePen.
Why choose the Bluelab OnePen Replacement Probe?
- Genuine Bluelab replacement – specifically designed for the Bluelab OnePen.
- Three sensors in one – replaces the pH, conductivity and temperature sensing functions together.
- Double-junction pH probe – designed for dependable pH measurement in nutrient solutions.
- Titanium EC electrodes – integrated conductivity electrodes provide EC measurement through the OnePen.
- Simple probe replacement – renew the sensing element without replacing the complete meter.
- IP68 protection – waterproof and dustproof construction for use in demanding growing environments.
- Extends the life of your OnePen – a cost-effective way to keep an existing meter in service when its original probe reaches the end of its life.
Which meter does the OnePen Replacement Probe fit?
This replacement probe is specifically designed for the Bluelab OnePen. It replaces the original combined pH, conductivity and temperature probe fitted to the meter.
It is not a universal Bluelab probe and should not be confused with Bluelab's separate pH probes, conductivity probes or other replacement sensors.
How to replace a Bluelab OnePen probe
Remove the OnePen storage cap, turn the meter upside down to help keep the batteries in position and unscrew the threaded collar holding the existing probe in place. Carefully remove the old probe from the meter body.
Remove the protective cap from the new replacement probe. Align the arrow on the top of the probe with the corresponding notch in the OnePen body, then push the probe fully into position.
Refit the threaded collar and tighten it securely. The new pH probe should then be correctly hydrated and calibrated before measurements are taken.
Looking after your new OnePen probe
Proper care can significantly affect the working life of a pH probe. Keep the pH sensor hydrated using Bluelab KCl Storage Solution and rinse the probe with fresh tap water after measurements to prevent nutrient salts being left on the sensor during storage.
Bluelab recommends regular cleaning and pH calibration. The OnePen's probe health indicator can also help identify when calibration performance is beginning to deteriorate and replacement may eventually be required.
Product details
| Brand | Bluelab |
|---|---|
| Product | OnePen Replacement Probe |
| Product type | Replacement multi-parameter sensor probe |
| Measurements | pH, conductivity (EC) & temperature |
| Compatibility | Bluelab OnePen |
| pH sensor | Double-junction pH probe |
| EC sensor | Titanium conductivity electrodes |
| Temperature measurement | Integrated |
| Waterproof rating | IP68 |
| Replacement type | User-replaceable probe module |
| Typical probe life | Approximately 18 months with appropriate care and maintenance |
Bluelab OnePen Replacement Probe FAQs
What does the Bluelab OnePen Replacement Probe measure?
The replacement probe incorporates sensors for pH, electrical conductivity and temperature, replacing all three measuring functions of the original OnePen probe.
Is this the correct replacement probe for the Bluelab OnePen?
Yes. This is the genuine Bluelab replacement probe specifically designed for the Bluelab OnePen.
Do I need to replace my whole OnePen when the probe wears out?
No. The OnePen has been designed with a replaceable probe, so the pH, EC and temperature sensor module can be renewed while retaining the existing meter body.
How long does a Bluelab OnePen Replacement Probe last?
Bluelab states that the average lifespan of a OnePen Replacement Probe is approximately 18 months. Probe life varies with use, storage and maintenance, and good care can help maximise its working life.
When should I replace my Bluelab OnePen probe?
Replacement may be required when the probe can no longer be successfully calibrated after cleaning and hydration, when its glassware is damaged or when measurements remain unreliable despite correct maintenance.
Does the replacement probe measure EC as well as pH?
Yes. The OnePen Replacement Probe incorporates titanium conductivity electrodes for EC measurement alongside its pH and temperature sensors.
Does a new OnePen probe need calibrating?
Yes. The pH sensor should be correctly hydrated and calibrated before use. The OnePen uses two-point pH calibration to establish accurate pH measurement.
How should I store the OnePen Replacement Probe?
Keep the storage-cap sponge moist with Bluelab KCl Storage Solution so the pH sensor remains hydrated. Do not store the pH probe in RO, distilled or de-ionised water.
Can I use any Bluelab replacement probe with the OnePen?
No. The OnePen requires the dedicated Bluelab OnePen Replacement Probe. Other Bluelab pH and conductivity probes are designed for different meters and connections.