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Digital Combo pH & Temperature Meter, Aquarium Thermometer pH Monitor with Automatic Calibration Function for Fish Tank Hydroponics Aquaculture Laboratory

4.2 4.2 out of 5 stars 386 ratings
$36.90
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Color: pH&Temp Monitor(Upgraded)
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Purchase options and add-ons

Brand Gain Express
Ph Range 0.0~14.0pH
Recommended Uses For Product Aquarium
Unit Count 1.0 Count
Manufacturer Gain Express Holdings Ltd

About this item

  • Accurately monitor pH and temperature of your fish tank or any type of water with this ph monitor device; PH Measurement Range: 0.0 to 14.0 pH, Accuracy: ±0.1; Resolution: 0.01
  • This PH meter with a permanent temperature probe and a replaceable pH probe for cost-effective maintenance; Up to 3 Points PH calibration (pH 7.0 / pH 4.01 / pH 10.01); It has advance one touch calibration function with automatic buffer recognition to avoid errors
  • Equipped with Automatic Temperature Compensation (ATC) for precise pH measurements regardless of temperature changes
  • Compact size with a large LCD display and smart backlight design for easy reading. pH and Temperature display and the unit operates power saving mode
  • Comes with pH calibration function, low battery indicator and switchable °C °F temperature unit for convenience and accuracy
› See more product details

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Product details

  • Package Dimensions ‏ : ‎ 6.93 x 5.79 x 2.32 inches; 13.76 ounces
  • Item model number ‏ : ‎ PHM-295
  • Batteries ‏ : ‎ 4 AA batteries required.
  • Date First Available ‏ : ‎ January 4, 2021
  • Manufacturer ‏ : ‎ Gain Express Holdings Ltd
  • ASIN ‏ : ‎ B08RYJ48X8
  • Customer Reviews:
    4.2 4.2 out of 5 stars 386 ratings

Important information

Directions

1. Remove the device from its packaging. 2. Insert the pH probe if needed. 3. Power on the device. 4. Calibrate the pH probe using the provided buffer solutions. 5. Use the device to measure pH and temperature in water. 6. (Optional) Mount the device on the wall or hang it using the provided accessories.

From the brand

Previous page

  2. Gain Express is a manufacturing and trading company that researches and produces high-tech & high-quality products, and offers a wide range of electronic products & testing instruments.

    Gain Express has years of trading experience (B2B & B2C) with many customers from North America, South America, Asia, Australia/Oceania, Europe, Africa, the Middle East and so on.

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Product Description

pH&Temp Monitor

This device accurately monitors pH and temperature in your fish tank. It features a permanent temperature probe and a replaceable pH probe, allowing you to save costs by only replacing the pH electrode instead of the entire monitor.

pH&Temp Monitor
pH&Temp Monitor
pH&Temp Monitor

Digital Combo pH & Temperature Meter

  • Automatic Temperature Compensation (ATC): The device adjusts for temperature variations, providing accurate pH readings regardless of changes in water temperature.

  • User-Friendly Design: Features a large LCD display with a smart backlight, compact size, and switchable °C/°F units for convenience.

  • Versatile Applications: Suitable for aquariums, pools, spas, hydroponics, labs, hospitals, and industrial water analysis.

pH&Temp Monitor
pH&Temp Monitor

Flexible Installation & Operation: Offers versatile mounting options (hang, wall-mount, or tripod) with factory pre-calibration and up to three-point pH auto-calibration and operates on AA batteries with power-saving mode for longer usage.

What's in the box

  • Battery

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    Customer reviews

    4.2 out of 5 stars
    386 global ratings

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    Customers say

    Customers find the chemical test strip functional and easy to use. They find it good value for money and convenient. Many appreciate the mount. However, some have issues with pH variation and mixed opinions on accuracy and durability.

    AI-generated from the text of customer reviews

    Select to learn more

    FunctionalityValue for moneyEase of useMountAccuracyDurabilityPh variation
    16 customers mention "Functionality"16 positive0 negative

    Customers like the product's functionality. They say it works well, is easy to calibrate, and provides accurate temperature and pH readings. It works as expected for the money.

    "I’m using this in a hydroponic setup. It works great. One difficult thing is measuring out the calibration solutions...." Read more

    "Wow I had it for a week and so far its working great! Exact temperature as my other thermometers and exact PH as my other other PH meters that were..." Read more

    "The delivery was on time and the ph and temp are nice and big onn the screen and it is very easy to start. I do recommend watch a video to set it up." Read more

    "I liked that it's actually accurate, even with the Temperature. I compared it to my digital 🌡️. The temp was the same. Maybe off by 1 point or #...." Read more

    13 customers mention "Value for money"10 positive3 negative

    Customers appreciate the value for money of the chemical test strips. They find them a great item and good value for the price.

    "...Overall, it’s a really nice pH probe at a reasonable cost." Read more

    "...This one costs less and has less wires because its battery powered and has a back light, the other ones I had don't so I really like this PH..." Read more

    "...Easy readability, easy to use, good value for the money." Read more

    "...What an absolute waste of money." Read more

    6 customers mention "Ease of use"6 positive0 negative

    Customers find the chemical test strips easy to use and read. They say they're convenient and good value for money.

    "...and the ph and temp are nice and big onn the screen and it is very easy to start. I do recommend watch a video to set it up." Read more

    "...probe from the PH probe, it should feature this extremely simple to implement function. If it did I would give it five stars and pay 20$ more." Read more

    "Bought to use with our fish aquarium. Easy readability, easy to use, good value for the money." Read more

    "My husband is legally blind and this is back lit and it is easy to read for him." Read more

    3 customers mention "Mount"3 positive0 negative

    Customers like the mount. They say it's easy to calibrate and mounts to a fish tank or wall adjacent to the fish. Some customers mention it works 24/7 with very accurate readings.

    "...] This device is easy to calibrate and mounts to a fish tank or wall adjacent to the fish tank nicely...." Read more

    "...Is well made and accurate. Leave in the pool all the time, mounted under the diving board. No more trying to match colors, I’m color blind!" Read more

    "I love this little device! It’s in my fish tank and works 24/7 with very accurate readings. Took the guessing game out of the way...." Read more

    31 customers mention "Accuracy"16 positive15 negative

    Customers have mixed opinions about the accuracy of the chemical test strips. Some find them accurate, mentioning that the readings always match closely, and the unit calibrates easily enough. However, others mention that the calibration goes out of whack for no reason, and the pH readings no longer accurately report even after calibration.

    "...So, pretty accurate right out the box...." Read more

    "...The unit performs very well. Initial calibration is important to get accurate pH readings...." Read more

    "This device is easy to calibrate and mounts to a fish tank or wall adjacent to the fish tank nicely...." Read more

    "...Readings are not even close nor consistent...." Read more

    16 customers mention "Durability"7 positive9 negative

    Customers have mixed opinions about the durability of the chemical test strip. Some find it well-made and accurate, while others say it's unreliable for their intended use and breaks within weeks or stops working after a month. The device becomes uncalibrated and loses proper function if done repeatedly.

    "...The blue lab can’t run on battery. It’s small, robust, and so far has held its calibration for several months without any drift on calibration..." Read more

    "...It will become Un-calibrated and lose proper function if done repeatedly. Overall, it’s a really nice pH probe at a reasonable cost." Read more

    "Brand new and just started using. Looks like a winner. I reserve the right to change my review." Read more

    "...Adding to this that it has died after about 2 years of constant use. Attempting to get a replacement pH probe." Read more

    3 customers mention "Ph variation"0 positive3 negative

    Customers are unhappy with the ph readings. They mention that the readings vary from 5 to 11, and the readings just flip around.

    "...It had good stable readings for 24 hours and is now wildy fluctuating from 5 to 11...." Read more

    "...The readings just flip all over the place. I set the calibration and then it won't even get an accurate reading from the calibration solution...." Read more

    "PH Fluctuation and not Stable..." Read more

    Great product for the price
    5 out of 5 stars
    Great product for the price
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    Top reviews from the United States

    • Nick
      5.0 out of 5 stars Works great.
      Reviewed in the United States on July 1, 2022
      Color: pH&Temp Monitor(Upgraded)Verified Purchase
      I’m using this in a hydroponic setup. It works great. One difficult thing is measuring out the calibration solutions. I have access to a lab, with scales and distilled water, but I don’t know how others would do this easily.

      The unit performs very well. Initial calibration is important to get accurate pH readings. But once you set it up, you don’t need to recalibrate often. The only time I needed to recalibrate was when I forgot to store the probe in the solution. Important: you never want to store the pH probe dry. It will become Un-calibrated and lose proper function if done repeatedly.

      Overall, it’s a really nice pH probe at a reasonable cost.
      2 people found this helpful
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    • anonymous
      5.0 out of 5 stars GREAT OUT THE BOX!
      Reviewed in the United States on January 7, 2024
      Color: pH&Temp Monitor(Upgraded)Verified Purchase
      just got this for DWC cloner. Out the box was calibrated to 10.15 when dropped in 10.01 buffer solution. So, pretty accurate right out the box. i did calibrate to 10.01 as per instructions, auto calibrated to 4.01 as the stick was placed in the next buffer solution. I am happy about batteries as I can put this where. I'm not sure if i would be happier if there was a dedicated power supply option. we shall see how well this holds up and how long it holds up for. Right now, I have it and will leave it in the cloner and monitor it a few times a day.
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    • Shark slayer
      4.0 out of 5 stars It dose not come with a suction cup for the probe
      Reviewed in the United States on February 4, 2024
      Color: pH&Temp Monitor(Upgraded)Verified Purchase
      The media could not be loaded.
      This device is easy to calibrate and mounts to a fish tank or wall adjacent to the fish tank nicely. This product is new to me so I’m still learning it however it seems to be pretty accurate or should I say very close to accurate my only issue with it is I believe if you have a device that’s made to be secured to a fish tank, and or a wall, there should be some kind of suction cup or bracket to secure the probe as well. This probe is an odd shape so it takes a little bit of customizing to make an average suction cup work. That’s really my only complaint at this point as far as the batteries go , this is been working with the set that came with it for just over three weeks now so it doesn’t appear to take or use up batteries very quickly. Hope this helps.
      One person found this helpful
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    • Mr S
      5.0 out of 5 stars Beyond durable for a slight bit less accuracy.
      Reviewed in the United States on November 21, 2024
      Color: pH&Temp Monitor(Upgraded)Verified Purchase
      I have purchased many budget ph meters. By far the best. It has been on the same set of batteries it came with over a year ago. I have dropped, submerged, and just unintentionally abraded this thing along every bend and it's is just now starting to show signs of needing a replacement probe. Does have about a .2 variance depending on how well the probe is seated in its socket. Would highly recommend for those who cannot afford more expensive options.
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    • Placeholder
      1.0 out of 5 stars Surprised!
      Reviewed in the United States on May 7, 2021
      Color: pH&Temp Monitor(Upgraded)Verified Purchase
      Wow I had it for a week and so far its working great! Exact temperature as my other thermometers and exact PH as my other other PH meters that were twice the price. This one costs less and has less wires because its battery powered and has a back light, the other ones I had don't so I really like this PH monitor.
      Update: sadly it stopped giving me accurate readings after a couple of months. The other ones I have from other brand have worked perfectly for about 3 years.
      6 people found this helpful
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    • Eddie
      5.0 out of 5 stars Monitors the PH of the tank and the temperature
      Reviewed in the United States on February 20, 2025
      Color: pH&Temp Monitor(Upgraded)Verified Purchase
      The delivery was on time and the ph and temp are nice and big onn the screen and it is very easy to start. I do recommend watch a video to set it up.
      Helpful
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    • Wolfman
      5.0 out of 5 stars Works well and is accurate
      Reviewed in the United States on September 1, 2022
      Color: pH&Temp Monitor(Upgraded)Verified Purchase
      I've been using this meter for ~ 4 months now, and have checked it against my BlueLab PH meter whenever it had a suspicious reading. I'm happy to report that the readings always compared very closely. I HAVE noticed that it took about 10X longer to get a stable reading compared to the BlueLab which was instantaneous by comparison. Since I'm using it for long term readings in my nutrient reservoir, this is not a problem for me.
      One person found this helpful
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    • EndlessPersistence
      5.0 out of 5 stars Does what it needs to do with proper maintenance
      Reviewed in the United States on November 19, 2021
      Color: pH&Temp Monitor(Upgraded)Verified Purchase
      I have had nothing but success with this PH meter. The cheap yellow ones consistently die in half the lifespan of this mounted one. I am so stoked to be able to just glance at it and. Get what I need. I hope this company makes another with tds/edc on it, too! 100% would buy! ;)

      Word to the wise--clean it in purified or distilled water every couple weeks (submerge probe and swish it around). Save the tiny water bottle the probe comes in as well. Whenever you flush and refill your tank, wash the probe then use some fresh, pure water to fill the probe cover bottle 2/3rds full. Then wet the grommet of the probe cover ca0, slide the cap up the probe, submerge the probe in the water-filled bottle all the way, screw on the bottle to the cap. No pH meter likes air. This system completely removes that variable do I find the 3 cent cover it comes with to be a really good added benefit. Adding to this that it has died after about 2 years of constant use. Attempting to get a replacement pH probe.
      15 people found this helpful
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    Top reviews from other countries

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    • Christian R.
      5.0 out of 5 stars Preciso
      Reviewed in Mexico on January 18, 2025
      Color: pH&Temp Monitor(Upgraded)Verified Purchase
      El tercero que compro y me encanta lo practico que es abrir la puerta del sump y ver el pH y temperatura sin tener que hacer nada
      Report
    • MARTIN GAGNON
      5.0 out of 5 stars great
      Reviewed in Canada on June 20, 2024
      Color: pH&Temp Monitor(Upgraded)Verified Purchase
      pretty accurate
      Report
    • Ludo
      5.0 out of 5 stars Working pH probe
      Reviewed in the United Kingdom on February 19, 2025
      Color: pH&Temp Monitor(Upgraded)Verified Purchase
      Product came in a sealed box with a working pH probe
      Report
    • Willy
      5.0 out of 5 stars Simple, solid an easy calibration
      Reviewed in Sweden on October 16, 2024
      Color: pH&Temp Monitor(Upgraded)Verified Purchase
      Price worth and with a size that is just right
      Report
    • W. W.
      5.0 out of 5 stars Präzise und einfach in der Handhabung
      Reviewed in Germany on March 31, 2023
      Color: pH&Temp Monitor(Upgraded)Verified Purchase
      Seit wenigen Wochen habe ich dieses Gerät in einem Dennerle Scapers Tank, 55 Liter, im Einsatz. Das Gerät kam incl. Sonde wohlbehalten bei mir an. Der Sonden Kopf war feucht und durch einen Spezialverschluss gesichert, was schon einmal ein sehr gutes Zeichen war. Der Hersteller schreibt das die Sonde vorkallibriert sei, und sie war es auch. Nach dem anschließen ging die Anzeige des Gerätes, und zwar sowohl die pH Anzeige, als auch die Temperatur Anzeige munter rauf und runter. Dieses war aber auch in der App (deutsche Sprache!) nachzulesen. Nach kurzer Zeit stabilisierte sich die Anzeige und ich habe einen Tropfentest zur Sicherheit durchgeführt. Und siehe da, ein 100% korrekter Wert. Auch die Temperaturanzeige stimmte perfekt. Ich möchte noch auf etwas ganz wichtiges Hinweisen. Wenn sie das Gerät erhalten, ist der Sonden Kopf in einer Flüssigkeit gelagert und mit einem Spezialverschluss versehen. Achten sie bitte darauf das ihre Sonde nicht trocken geliefert wurde. Dann ist die Sonde komplett unbrauchbar. Einmal trocken und sie können die Sonde entsorgen ! Wie schon erwähnt wurde meine Sonde im perfekten Zustand geliefert. Nach dem Entfernen des Sonden-Kopf-Schutzes schwenken sie diesen bitte unbedingt kurz in destilliertem Wasser bevor sie diese in ihrem Aquarium einbringen. Ich kann dieses Produkt, zu diesem unschlagbaren Preis, sehr empfehlen. Viel genauer als jeder Teststreifen, und auf Dauer preiswerter sowie komfortabler als Tropfentests. Aber Achtung, die Sonden halten nicht ewig (i.d.R. max. 1 Jahr). Der Anschluss ist jedoch so genormt das sie handelsübliche Ersatzsonden namhafter Hersteller nachordern können, und diese dann austauschen. Der Hersteller empfiehlt eine regelmäßige Kalibrierung etwa alle 3 Monate. Es wird entsprechendes Pulver mitgeliefert, sie benötigen lediglich noch destilliertes Wasser. Die Kalibrierung selbst ist kinderleicht und selbst für Anfänger problemlos zu bewerkstelligen. Dadurch das dieses Gerät batteriebetrieben ist, kann es überall (nicht nur am Beckenrand) installiert werden. Die Kabel von Temperatursonde als auch pH Sonde sind so lang das diese in jedem Aquarienschrank gut verlegt werden können. Die hier veröffentlichten negativen Rezensionen kann ich nicht nachvollziehen. Wie schon gesagt, achten sie darauf das der pH Sonden Kopf feucht bei ihnen ankommt.
      Customer image
      W. W.
      5.0 out of 5 stars
      Präzise und einfach in der Handhabung

      Reviewed in Germany on March 31, 2023
      Seit wenigen Wochen habe ich dieses Gerät in einem Dennerle Scapers Tank, 55 Liter, im Einsatz. Das Gerät kam incl. Sonde wohlbehalten bei mir an. Der Sonden Kopf war feucht und durch einen Spezialverschluss gesichert, was schon einmal ein sehr gutes Zeichen war. Der Hersteller schreibt das die Sonde vorkallibriert sei, und sie war es auch. Nach dem anschließen ging die Anzeige des Gerätes, und zwar sowohl die pH Anzeige, als auch die Temperatur Anzeige munter rauf und runter. Dieses war aber auch in der App (deutsche Sprache!) nachzulesen. Nach kurzer Zeit stabilisierte sich die Anzeige und ich habe einen Tropfentest zur Sicherheit durchgeführt. Und siehe da, ein 100% korrekter Wert. Auch die Temperaturanzeige stimmte perfekt. Ich möchte noch auf etwas ganz wichtiges Hinweisen. Wenn sie das Gerät erhalten, ist der Sonden Kopf in einer Flüssigkeit gelagert und mit einem Spezialverschluss versehen. Achten sie bitte darauf das ihre Sonde nicht trocken geliefert wurde. Dann ist die Sonde komplett unbrauchbar. Einmal trocken und sie können die Sonde entsorgen ! Wie schon erwähnt wurde meine Sonde im perfekten Zustand geliefert. Nach dem Entfernen des Sonden-Kopf-Schutzes schwenken sie diesen bitte unbedingt kurz in destilliertem Wasser bevor sie diese in ihrem Aquarium einbringen. Ich kann dieses Produkt, zu diesem unschlagbaren Preis, sehr empfehlen. Viel genauer als jeder Teststreifen, und auf Dauer preiswerter sowie komfortabler als Tropfentests. Aber Achtung, die Sonden halten nicht ewig (i.d.R. max. 1 Jahr). Der Anschluss ist jedoch so genormt das sie handelsübliche Ersatzsonden namhafter Hersteller nachordern können, und diese dann austauschen. Der Hersteller empfiehlt eine regelmäßige Kalibrierung etwa alle 3 Monate. Es wird entsprechendes Pulver mitgeliefert, sie benötigen lediglich noch destilliertes Wasser. Die Kalibrierung selbst ist kinderleicht und selbst für Anfänger problemlos zu bewerkstelligen. Dadurch das dieses Gerät batteriebetrieben ist, kann es überall (nicht nur am Beckenrand) installiert werden. Die Kabel von Temperatursonde als auch pH Sonde sind so lang das diese in jedem Aquarienschrank gut verlegt werden können. Die hier veröffentlichten negativen Rezensionen kann ich nicht nachvollziehen. Wie schon gesagt, achten sie darauf das der pH Sonden Kopf feucht bei ihnen ankommt.
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