I have purchased 2 of these, why are they so inaccurate?

If you calibrate ANY PH meter using the mix it yourself "calibration" solutions, accuracy will be impossible. I just purchased this meter set, and discovered the distilled water I use was ph4 and below! I have the "other" style cheap meter, that has proven very stable for me, and after checking it in GHP 7.0 calibration solution, used it to test the accuracy of this relentlessly poor example of a ph testing system. First off, the solution instructions make no mention what the ph of the distilled water needs to be. My 4.0 water mixed with the 4.0 and 6.86 powder, resulted in a solution of 3.3 and 6.0 instead, so IMO, the MIY calibration solutions are a joke, as are ph meters that calibrate on the 6.86 standard instead of 7.0.

If i use a 7.0 calibration solution will the automatic calibration be off by .14 since it comes with a 6.86 calibratind powder?

Yes! I recently calibrated with 7.0. Prior to calibration, it read the 7.0 solution at 7.0, calibrated with 7.0 solution it now reads 7.18. Find the correct calibration solution

If my tap water is between 6.5 and 7.0 ph do i need to add the ph up and down liquid i bought for indoor cannabis grow? What about ppm?

If you’re growing in soil 6.5 is perfect if you’re growing in Hydro/water do you want to be around 5.8 say you’re at 7.0 PH I would just add a couple drops per gallonTo get it down two around 6.5

If I choose EC, does it retain the setting after power cycles?

Yes, but my meter randomly switched back to TDS. The "EC" does not show a decimal, and the numbers are too close to TDS. If you don't pay attention, you will hurt your plants. Do not purchase.

Desertcart Logo

Deliver to Philippines

For best experience Get the App

DOWNLOAD THE APP

WE SOURCE ITEMS FROM

UAE
UK
India
USA
Japan
KOREA

Customer Services

About Us

Customer Support

Description

🌊 Master your water quality with precision and style!

PORTABLE POWERHOUSE - Lightweight, pen-style design with protective case—perfect for on-the-go professionals.
TRIPLE THREAT METER - Simultaneously measures TDS, EC, and temperature to cover all your water quality needs.
CERTIFIED CONFIDENCE - UL certified for trusted reliability and consistent performance every time.
VERSATILE APPLICATIONS - Ideal for hydroponics, aquariums, pools, and household water testing—be the water quality guru in your circle.
PRECISION AT YOUR FINGERTIPS - Ultra-fine 0.01 pH resolution for lab-grade accuracy in every test.

The VIVOSUN pH and TDS Meter Combo offers lab-grade 0.01 pH accuracy and ±2% readout precision in a sleek, portable pen design. This 3-in-1 device measures pH, total dissolved solids (TDS), electrical conductivity (EC), and temperature, making it perfect for hydroponics, aquariums, pools, and household water testing. UL certified and equipped with a protective case, it ensures reliable, on-the-go water quality monitoring for professionals and enthusiasts alike.

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.

₱2735

Duties & taxes incl.

Philippinesstore

Free Returns

30 daysfor PRO membership users

15 dayswithout membership

Secure Transaction

ChatGPT - opens in a new tab Perplexity - opens in a new tab Claude - opens in a new tab Grok - opens in a new tab Google AI - opens in a new tab

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

View all Trustpilot reviews

Color	Combo
Size	6.1x1.22 in
Length	6.1 inches
Weight	100 Grams
Width	1.22 inches
Material Type	Plastic
Batteries Included?	No
Brand	VIVOSUN
Manufacturer	VIVOSUN
Item model number	4336465266
Package Dimensions	17 x 10.1 x 3.2 cm; 100 g
ASIN	B06XKMH86J

VIVOSUN pH and TDS Meter Combo, 0.01ph High Accuracy Pen Type pH Meter ± 2% Readout Accuracy 3-in-1 TDS EC Temperature Meter for Hydroponics, Household Drinking, and Aquarium, UL Certified

Description

Specifications

Have a Question? See What Others Asked

Common Questions