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, LLC AI209 pH Pocket Tester, PH20 Value Waterproof, 0.1 Accuracy, 0-14.0 Range, Complete Kit

Product ID: 48808217

Details

Age range (description)
Adult
Brand
Apera
Colour
Regular Kit
Connectivity technology
Bluetooth
Display type
Digital
Included components
1 Pocket 1 set

⚡0.1 pH accuracy

🔋2000 hours battery life

🌡️Auto Temp. Compensation 0-50°C

€ 146.37

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Description

📊 Stay sharp, measure smarter — never miss a perfect pH moment!

LONG LASTING POWER - Up to 2000 hours of continuous use powered by easy-to-replace AAA batteries.
READY TO GO COMPLETE KIT - Includes calibration solutions, batteries, lanyard, and a sleek carrying case for ultimate portability.
PRECISION AT YOUR FINGERTIPS - Ultra-accurate 0.1 pH resolution for flawless measurements every time.
TEMPERATURE ADAPTED ACCURACY - Auto temperature compensation keeps results consistent from 0 to 50°C.
SMART CALIBRATION ZERO GUESSWORK - Auto buffer recognition and calibration ensure effortless, reliable readings.

The Apera Instruments AI209 PH20 Pocket Tester delivers lab-grade 0.1 pH accuracy across the full 0-14 range with smart auto calibration and temperature compensation. Designed for professionals on the move, it comes as a complete kit with calibration solutions, batteries, and a durable carrying case. Its waterproof design, ultra-clear dual display, and 2000-hour battery life make it the go-to tool for hydroponics, water treatment, and pool maintenance.

Specifications

ASIN	B01ENFOHN8
Age Range Description	Adult
Battery Life	2000 Hours
Best Sellers Rank	269,327 in Home & Kitchen ( See Top 100 in Home & Kitchen ) 11 in pH Meters
Brand	Apera Instruments
Colour	Regular Kit
Connectivity Technology	Bluetooth
Customer Reviews	4.3 4.3 out of 5 stars (8,638)
Display Type	Digital
Global Trade Identification Number	00858718006339
Immersion Depth	1E+1 Centimetres
Included Components	1 Pocket tester, 1 set of calibration solutions, 2 batteries, 1 case
Indoor Outdoor Usage	Outdoor
Item Length	218 Millimetres
Item Weight	3.9 Ounces
Lower Temperature Rating	32 Degrees Fahrenheit
Manufacturer	Apera
Manufacturer Part Number	AI209
Model Name	PH20
Model Number	AI209
Number of Batteries	4 AAA batteries required. (included)
Outer Material	Plastic or Silicone
Power Source	Battery Powered
Product Care Instructions	Wipe Clean
Resolution	0.1 degree
Response Time	5 seconds
Reusability	Reusable
Special Features	Waterproof
Specification Met	CE, ISO 9001
Style Name	single
UPC	858718006339
Unit Count	1 Tester
Upper Temperature Rating	50 Degrees Celsius

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€ 146.37

Duties & taxes included

In stock

Sold byAmazon MonacoDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Monaco.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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