I was not having any luck finding a decent & reliable ph meter. I wanted to wait a while before writing a review to make sure. The probe arrived with a little solution but it looked like the storage cap was not tightened enough but at least it did not arrive dry. The calibration solution was included in 20ml package, enough for one calibration but if you have a an empty bottle and you use distilled water when calibrating you can use the same solution a few times. It calibrated easily, probably one of the easiest calibrations compared to others I had, all you do is put the probe in 7.0 solution and press and hold CAL, thats it & the same for the 4.0 solution. After the first week the ph started drifting a bit but I was using it several times a day due to switching to different brand of nutrients for my peppers, I was learning a new routine and this ph meter made it so easy. I calibrated it again on day 6 and I'm thinking it was due to being new; it's held the calibration for about 24 days before it started drifting ( +.1 ) that was with me using it once a day and twice a day every 7 days when I change my water. It reads the ph fast and stays stable regardless of how long it stays in the solution. It also checks the temperature but I'm consistently in the sweet spot so don't use that feature much. The attached TDS/EC nutrient meter is a bonus, it reads all of them. I prefer using the 500ppm scale, but if you prefer EC, it's there too.
It's convenient in my Aerogardens, fits in the holes perfect which is why I love it even more. I got a cheap bag to carry it around, I recommended something with a lanyard or strap so that you don't drop it if you have to carry the meter with the probe in water. I wash the probes in tap water after every use and change the storage solution after every 3-5 uses. I've never used distilled water although I'm sure it's better to rinse in distilled water instructions say tap water is perfectly fine. I recommend you get KCL storage solution and calibration solution 4 and 7 while your at it. If you don't have KCL solution you can use the 4.0 solution to store the ph probe while you get the KCL storing solution. If you have access to a hydroponic or grow store buy the calibration solution there it may be cheaper by a lot.
This is overkill for what I have growing, definitely commercial quality but I love that it works, and it does what it does perfectly. I no longer double check the ph with other meters I trust these readings. I highly recommend this meter & Bluelab.
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From the manufacturer
An all-in-one solution for testing pH, conductivity and temperature
A lightweight and robust handheld solution
Key features include:
- Portable, doesn't require a power supply to operate
- Simple two-point pH calibration process for accuracy
- No calibration required for conductivity and temperature
- Double-junction probe for superior accuracy
Customizable measurement scales for extra convenience
For utmost convenience, you'll be able to customise your Bluelab Combo Meter with your preferred measurement scales. Not only will the Combo Meter measure pH, but you can also select from EC, CF, PPM 500 (TDS) and PPM 700 for conductivity or from °C and °F for temperature.
Get the fundamentals of growing right, every time
Replaceable double-junction pH probe included
A double-junction pH probe comes standard with the Bluelab Combo Meter. Unlike standard glass bulbs, the double-junction probe reduces build up on the probe for consistent readings and to increase lifespan.
New Zealand-made quality, built for growers
Our products are designed and built with growers, for growers - so you can relax knowing that your meter is robust and user-friendly, allowing you to get on with the tasks of everyday growing. The Bluelab Combo Meter was designed and built in New Zealand.
Tried and trusted by growers like you
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Easy calibration for pHGet rid of the headache of pH calibration with our simple two-point calibration process. Remember to calibrate your meter's pH probe before first use. The pH probe comes with a 30-day calibration indicator that can be easily viewed on your meter's screen. You do not need to calibrate for conductivity or temperature. |
Fast and accurate readingsWhen taking a measurement, simply place your probe into the solution and the selected reading will be displayed on screen. As the Bluelab Combo Meter is portable and does not require a power supply to operate, you can get quick and accurate readings anytime and anywhere. |
Superior design and manufacturingAll Bluelab products are proudly designed and manufactured in New Zealand. The design focuses on ergonomic qualities to assist with regular use in varying grow environments. Our rigorous production process includes each meter being inspected by hand before it finds its way to you! |
The Bluelab promiseThe Bluelab Combo Meter comes with reputable support. This means that you can have complete peace of mind when you invest in the Bluelab Combo Meter. |
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| pH Pen | Conductivity Pen | Grower's Toolbox | Guardian Monitor | Soil pH Pen | Pro Controller | |
| Accuracy | 0.1 pH, 1°C/2°F | 0.1 EC, 1 CF, 50 PPM (PPM 500 TDS), 70 PPM (PPM 700), 1°C/2°F | Bluelab pH Pen: 0.1 pH, 1°C/2°F; Bluelab Conductivity Pen: 0.1 EC, 1 CF, 50 PPM (PPM 500 TDS), 70 PPM (PPM 700), 1°C/2°F | 0.1 pH, 0.1 EC, 1 CF, 50 PPM (PPM 500 TDS), 70 PPM (PPM 700), 1°C/2°F | 0.1 pH, 1°C/2°F | 0.1 pH, 0.1 EC, 1 CF, 50 PPM (PPM 500 TDS), 70 PPM (PPM 700), 1°C/2°F |
| Parameters measured | pH, temperature | Conductivity/EC, temperature | pH, conductivity/EC, temperature | pH, conductivity/EC, temperature | pH, temperature | pH, conductivity/EC, temperature |
| Replaceable probe | ✓ | ✓ | ||||
| Backlit screen | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Power supply | 1 x AAA alkaline battery | 1 x AAA alkaline battery | 1 x AAA alkaline battery per pen | Input: 100-240 Vac, 50-60 Hz, 5 VA, 4 interchangeable plug types (USA, Euro, UK, NZ/AUS) Output: 5VDC 1Amp | 1 x AAA alkaline battery | Input: 100-240 Vac, 50-60 Hz, 5 VA, 4 interchangeable plug types (USA, Euro, UK, NZ/AUS) Output: 24VDC 0.4amp |
| Popular for | Hydroponic nutrient availability measuring in solution | Hydroponic nutrient density measuring | Hydroponic nutrient solution measuring starter kit | Wall-mounted nutrient solution monitoring for medium to large reservoirs with alarm parameters | Hydroponic nutrient availability measuring in media | Wall-mounted nutrient solution monitoring for medium to large reservoirs with alarm parameters and automated dosing (pumps sold separately |
Bluelab: Trusted by growers like you for over 30 years
For over 30 years, Bluelab has been providing award-winning and innovative technology that helps growers unlock their plants' full potential. At Bluelab, we believe that our commitment to designing hardy, purpose-built products and creating strong educational programs will help elevate the standard of growing. Together with our growers, we will create a world with fewer pesticides, food miles and less water usage. Let Bluelab’s products take your growing to the next level.
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Reviewed in the United States on August 11, 2021
Style: Combo Meter (solution probe)Verified Purchase
I was not having any luck finding a decent & reliable ph meter. I wanted to wait a while before writing a review to make sure. The probe arrived with a little solution but it looked like the storage cap was not tightened enough but at least it did not arrive dry. The calibration solution was included in 20ml package, enough for one calibration but if you have a an empty bottle and you use distilled water when calibrating you can use the same solution a few times. It calibrated easily, probably one of the easiest calibrations compared to others I had, all you do is put the probe in 7.0 solution and press and hold CAL, thats it & the same for the 4.0 solution. After the first week the ph started drifting a bit but I was using it several times a day due to switching to different brand of nutrients for my peppers, I was learning a new routine and this ph meter made it so easy. I calibrated it again on day 6 and I'm thinking it was due to being new; it's held the calibration for about 24 days before it started drifting ( +.1 ) that was with me using it once a day and twice a day every 7 days when I change my water. It reads the ph fast and stays stable regardless of how long it stays in the solution. It also checks the temperature but I'm consistently in the sweet spot so don't use that feature much. The attached TDS/EC nutrient meter is a bonus, it reads all of them. I prefer using the 500ppm scale, but if you prefer EC, it's there too.
It's convenient in my Aerogardens, fits in the holes perfect which is why I love it even more. I got a cheap bag to carry it around, I recommended something with a lanyard or strap so that you don't drop it if you have to carry the meter with the probe in water. I wash the probes in tap water after every use and change the storage solution after every 3-5 uses. I've never used distilled water although I'm sure it's better to rinse in distilled water instructions say tap water is perfectly fine. I recommend you get KCL storage solution and calibration solution 4 and 7 while your at it. If you don't have KCL solution you can use the 4.0 solution to store the ph probe while you get the KCL storing solution. If you have access to a hydroponic or grow store buy the calibration solution there it may be cheaper by a lot.
This is overkill for what I have growing, definitely commercial quality but I love that it works, and it does what it does perfectly. I no longer double check the ph with other meters I trust these readings. I highly recommend this meter & Bluelab.
It's convenient in my Aerogardens, fits in the holes perfect which is why I love it even more. I got a cheap bag to carry it around, I recommended something with a lanyard or strap so that you don't drop it if you have to carry the meter with the probe in water. I wash the probes in tap water after every use and change the storage solution after every 3-5 uses. I've never used distilled water although I'm sure it's better to rinse in distilled water instructions say tap water is perfectly fine. I recommend you get KCL storage solution and calibration solution 4 and 7 while your at it. If you don't have KCL solution you can use the 4.0 solution to store the ph probe while you get the KCL storing solution. If you have access to a hydroponic or grow store buy the calibration solution there it may be cheaper by a lot.
This is overkill for what I have growing, definitely commercial quality but I love that it works, and it does what it does perfectly. I no longer double check the ph with other meters I trust these readings. I highly recommend this meter & Bluelab.
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