I made the mistake of calibrating it with the solution mix with water at 22°c instead of 25°c. do i have to redo the process to make the ph accurate?

To correct the true reading, yes, but throw it out, return it whatever just get a better one.

will it measure the water tempter or air temp.

Hi, the meter measures pH and water temperature simultaneously.

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GAIN EXPRESS 2-in-1 PH and Temperature Monitor, PH Measuring Instrument, PH Meter, Measuring Range 0-14 pH, Water Quality Measurement, Aquarium, Hydroponics, Backlight Function, Replaceable

GAIN EXPRESS 2-in-1 PH and Temperature Monitor, PH Measuring Instrument, PH Meter, Measuring Range 0-14 pH, Water Quality Measurement, Aquarium, Hydroponics, Backlight Function, Replaceable

Product ID: 738511838

Details

Age Range (Description)
Adult
Brand
Gain Express
Color
Black
Included Components
Battery
Number of Batteries
4 A batteries
Outer Material
Plastic

📊Dual pH & temp display

🔄Replaceable pH electrode

🌡️0-50°C temp range

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R1462

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Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🌟 Master your water quality game with precision and ease!

SEE MORE DO MORE - Dual backlit display shows pH and temperature simultaneously—even in low light environments.
ALL IN ONE READY KIT - Comes complete with calibration powders and accessories—perfect for labs, aquariums, hydroponics, and industrial use.
CALIBRATE LIKE A PRO - One-point manual calibration ensures your readings stay sharp and reliable over time.
BUILT TO LAST ADAPT - Replaceable BNC pH electrode with protective cap means easy maintenance and extended device life.
PRECISION IN EVERY DROP - Accurate pH measurement across full 0-14 range with automatic temperature compensation for flawless readings.

The GAIN EXPRESS 2-in-1 pH and Temperature Monitor delivers fast, accurate measurements of pH (0-14) and temperature (0-50°C) with automatic temperature compensation. Featuring a dual backlit display, replaceable electrode, and a complete calibration kit, it’s designed for professionals managing aquariums, hydroponics, labs, and industrial water quality testing.

Specifications

ASIN	B07P7FNRSZ
Additional Features	High Accuracy
Age Range Description	Adult
Amazon Bestseller	#41,696 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #86 in Lab pH Meters
Brand Name	Gain Express
Color	Black
Customer Reviews	3.9 3.9 out of 5 stars (272)
Included Components	Battery
Manufacturer	Gain Express Holdings Ltd
Model	PHM-245
Number of Batteries	4 A batteries required.
Outer Material	Plastic
Part Number	PHM-245_US
Power Source	Battery Powered
Response Time	1 seconds
UPC	600316549851
Unit Count	1.0 Count

Reviews

ま**つ

使用して1カ月不具合はありません

14.01.2026

倉**亮

水温・pH値精確に測れてます定期的に校正しながら使用維持していこうと思いますありがとうございました！

19.09.2025

し**ぉ

リピートですがハズレを引いてしまいました。 PH電極は前回購入本体に挿入するとPH表示されるので、どうやら今回購入本体が不良のようです。返品交換手続きしました。速やかにきちんと表示されるものに交換願いたいものです。評価は無星ですがそれだと投稿できないようなので、星1とします。

15.07.2023

な**た

校正すれば正確に測れます。 1ヶ月ぐらいで0.2ぐらいの誤差がでますが許容範囲です。 100ｖコンセントから電力を送れるので、電池交換の心配もありません。不満があるとすればデザインです。 AC電源の差口が左側面にあり、コードの取り回しがイマイチです。形状からいって右側にあるべきです。温度計のコードもそうです。 PH計のソケットもゴツくてどうしても水槽の右上か右下に付けることになるので。

2.05.2025

A**ー

２ヶ月に一度くらいは試薬による調整は必要かと思われます。半年を経過致しましたが、問題なく機能しております。アクアPh降下法による二酸化炭素添加には必須アイテムかと思われます。初めてのモニター導入にはおすすめであります。

23.07.2025

T**2

かなり正確に測れます。数か月まともに動き続けるならあと２つ３つ買っときます。

26.09.2023

商**ー

PH測定が朝、昼、晩で測定数値が大幅にずれる（ほかの測定器で確認するとPHの数値が違う）校正液で6.86に校正して4.01と9.18の校正液に浸すとこれらの数値にはならない。 HPの安定性と精度が悪い。返品したい。

1.11.2023

P**K

I’ve had this for about 2 years and still works like it’s brand new. Temperature is on point and very accurate with the pH. Battery life is great and this product is very durable. I highly recommend!

6.12.2025

F**R

Après trois mesure de PH la sonde ne fonctionne plu Cet article est sous garantie pouvez vous me la remplacer Merci de votre retour

18.07.2024

J**E

Easy calibration instruction, highly recommended for salt water tank with less budget

10.08.2022

G**R

Funktioniert sehr gut

7.02.2026

B**Z

Has everything I need. Very accurate with large display.

23.08.2021

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