How often does this pH meter need to be re-calibrated and/or how can I tell when it needs to be re-calibrated?

The manufacturer recommends keeping the device probe in a neutral storage solution; the protective tip case/container actually has a 'fill' line for guidance, and it is designed to hold a liquid safely when stored as indicated -- If someone uses distilled or deionized water by itself as a storage solution, the salts contained in the probe tip will dissipate and the probe will then need to be replaced--about $25, plus a fine headache trying to get it right. If you are out of storage solution keeping the probe wet somehow is better than dry--but don't store without the specialized solution for more than a day or so; these are typically $10-$13 for 100ml - 250ml size bottles on Amazon.

Can anyone confirm if this comes pre calibrated?

Mine was, the PH20 unit. Dead on, but I still did the cal to know how. If you use it for pH 8.0 or lower, the 4.00 and 7.00 solutions are perfect-no need for 10.00 test buffer solution. I am AMAZED at how bad my cheapy meters are, and how they disagree with each other and this one.

Can this be used to analyze urine?

Yes, it can tests urine with no problem. You can use the probe cap as a container for the urine.

I will be using this meter once a month. Do I need storage solution for the probe?

Storing the probe in the storage solution helps keep the probe's sensitivity and accuracy. So it's a recommended practice. While storing the probe without any solution will not damage the probe, it's just going to cause the probe to lose its sensitivity and accuracy temporarily. Store the probe in the storage solution again for about 10 minutes, the sensitivity and accuracy can be restored.

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APERA INSTRUMENTS AI209 Value Series PH20 Waterproof pH Tester Kit, ±0.1 pH Accuracy

APERA INSTRUMENTS AI209 Value Series PH20 Waterproof pH Tester Kit, ±0.1 pH Accuracy

Product ID: 34756289

Details

Age Range (Description)
Adult
Brand
Apera
Color
Regular Kit
Display Type
Digital
Included Components
PH20 Value pH
Outer Material
Plastic

⚡±0.1 pH accuracy

💧IP67 waterproof rating

🔋2000 hours battery life

HK$760

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Description

💧 Stay sharp, stay precise — the pH tester that works as hard as you do.

LONG LASTING PERFORMANCE - Up to 2000 hours of continuous use powered by included AAA batteries—ready when you are.
SMART STABILITY DETECTION - Auto recognition of stable values eliminates guesswork, ensuring consistent, reliable results.
BUILT TO BRAVE THE ELEMENTS - IP67 waterproof design means no fear of spills or splashes on the job.
PRECISION THAT POWERS YOUR PROJECTS - Ultra-accurate ±0.1 pH readings for confident decisions every time.
EFFORTLESS CALIBRATION INSTANT CONFIDENCE - Auto buffer recognition and 3-point calibration keep your readings flawless.

The APERA INSTRUMENTS AI209 PH20 Waterproof pH Tester Kit delivers professional-grade ±0.1 pH accuracy with IP67 waterproof protection and up to 2000 hours of battery life. Featuring automatic temperature compensation, 3-point auto calibration with buffer recognition, and smart stable value detection, it ensures fast, reliable readings across diverse environments. Packaged with calibration solutions, batteries, and a rugged carrying case, this tester is ideal for hydroponics, water treatment, and environmental monitoring, backed by ISO 9001 quality standards.

Specifications

ASIN	B01ENFOHN8
Additional Features	Waterproof
Age Range Description	Adult
Battery Life	2000 hours
Best Sellers Rank	#3,799 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #4 in Lab pH Meters
Brand Name	Apera Instruments
Color	Regular Kit
Customer Reviews	4.4 4.4 out of 5 stars (8,856)
Display Type	Digital
Global Trade Identification Number	00858718006339
Included Components	PH20 Value pH tester kit
Indoor Outdoor Usage	Outdoor
Item Length	21.8 centimeters
Item Weight	3.9 ounces
LowerTemperature Range	32 °F
Manufacturer	Apera Instruments
Model	AI209
Model Name	PH20
Number of Batteries	4 AAA batteries required. (included)
Outer Material	Plastic
Part Number	AI209
Power Source	Battery Powered
Product Care Instructions	Hand Wash Only
Response Time	5 seconds
Reusability	Reusable
Specification Met	CE, ISO 9001, RoHS
Style Name	Regular Kit
UPC	858718006339
Unit Count	1 Count
Upper Temperature Range	50 °C
Warranty Description	Two-Year limited warranty for the instrument, Six-Month limited warranty for the electrode(s).

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HK$760

Duties & taxes included

In stock

Sold byAmazon Hong KongDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

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