When you meet calibration error-like you would like to calibrate pH 6.86 but get 4.01 value, please

Long press the "HOLD/TEMP" & "MODE/CAL" Button for 3-5 seconds to restore factory Settings, and then use the powder pack for calibration the Digital pH meter

It took a long time to calibrate or after calibrating, the reading was tested but the reading came out "0" value?

Please check whether the glass probe was broken. If not that means you met calibration error. For this issue, please long press the "HOLD/TEMP" & "MODE/CAL" Button for 3-5 seconds to restore factory Settings, and then use the powder pack to calibrate

For better using experience of the pH meter for water

We recommend to soak the pH meter in clear water for 5 minutes before starting calibration after receive the product or long time no use. Because it may cause inaccurate readings if you immediate use for the first time or long time no use.

Accuracy of this digital pool water tester

±0.01 pH Resolution, pH Range: 0.00 to 14.00 pH; 1ppm, ±0.1ppt Resolution, TDS Value: -9990ppm; ±32.9˚F/0.5˚C Resolution,TEMP: 32 to 140˚F (0 to 60˚C); Auto Power-Off: 5 minutes without operation.

Why isn't the pH meter calibrating correctly after following the temperature and solution instructions?

Please check if the product has gotten water inside. If it has, please disassemble the product, shake out the water, and then let it air dry naturally.

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💧 Master your water quality game with precision and style!

SMART AUTO FUNCTIONS - One-button hold locks readings; auto-off after 5 minutes conserves battery life.
TEMPERATURE NO SWEAT - Automatic Temperature Compensation guarantees reliable results regardless of liquid temperature fluctuations.
EFFORTLESS READINGS ANYWHERE - Green backlit LCD and pocket-sized design make testing pools, aquariums, or wine effortless on the go.
ALL IN ONE WATER QUALITY MASTER - Simultaneously measures pH, TDS, and temperature for a comprehensive water profile.
PRECISION THAT PROFESSIONALS TRUST - Ultra-sensitive glass probe with 3-point calibration ensures lab-grade accuracy every time.

The PmoYoKo Digital pH Meter is a compact, high-accuracy 3-in-1 pen tester that measures pH (0-14 range with ±0.01 resolution), TDS (0-1999 ppm), and temperature (0-60°C) simultaneously. Featuring a premium glass probe, 3-point calibration, automatic temperature compensation, and a backlit LCD, it delivers fast, reliable readings for water, wine, spas, aquariums, and more. Its pocket-sized design and smart auto-off function make it ideal for professionals and enthusiasts seeking precise water quality monitoring anywhere.

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

19.68 OMR

Duties & taxes incl.

OMANstore

Free Returns

30 daysfor PRO membership users

15 dayswithout membership

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Suresh K.

Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

Anjali K.

The product quality is outstanding. Exactly what I needed for my work.

1 month ago

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Manufacturer	PmoYoKo
Part number	PH-9901
Item Weight	168 g
Product Dimensions	3.81 x 3.81 x 3.81 cm; 168 g
Item model number	EZ-9901
Color	Grey-3 in 1 PH TDS and Temp Tester
Voltage	1.5 Volts
Item Package Quantity	1
Plug Profile	Freestanding
Batteries Included?	No
Batteries Required?	No
tech_spec_battery_description_toys	Alkaline

PmoYoKo Digital pH Meter with ATC pH r, 3 in 1 pH TDS Temp 0.01 Resolution High Accuracy Pen Type r, Water r for Water, Wine, Spas, Aquariums

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