# MEXYBE A2 4-in-1 Digital Water Tester for TDS, EC, and Temperature

Check RO water, aquariums, or tap water with the MEXYBE A2 4-in-1 meter, featuring a TDS range of 0–9999 ppm.

- [Original product page](https://www.ofertitastop.com/us/product/mexybe-a2-in-digital-water-tester)
- [View offer](https://www.ofertitastop.com/us/visit/mexybe-a2-in-digital-water-tester)
- Market: US
- Language: en-US
- Currency: USD
- Product updated: 2026-10-17T22:40:31.121Z
- Brand: MEXYBE
- Model: A2
- SKU: ofertitastop-us-127990
- Category: Home & Garden > Pool & Spa > Pool & Spa Accessories > Pool Cleaners & Chemicals
- Source store: amazon US
- Active deal: Yes
- Price: 8.99 USD
- Previous price: 9.99 USD
- Discount: 10%
- Rating: 4.4 / 5
- Reviews: 6450

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## Description

The 4-in-1 format combines TDS, electrical conductivity, and temperature readings in a handheld water tester. Its backlit display is designed to make results easier to read, while a color TDS chart on the meter provides a quick reference for PPM values.

Use it to compare water samples or monitor changes in an RO/DI system. It is a measurement tool, not a detailed analysis of which substances are present.

## Best use cases

The MEXYBE A2 is intended for checking tap, bottled, filtered, well, and aquarium water, as well as water used in hydroponics, pools, spas, and hot tubs. For an RO or DI system, readings can help track TDS changes over time and indicate when it may be worth checking the filter. In an aquarium or hydroponic setup, the EC and temperature readings add context alongside TDS.

The basic procedure is straightforward: immerse the meter between the marked lines, stir gently to clear air bubbles, then wait for the reading to stabilize and lock. The instructions say stabilization takes about five seconds. A manual hold function is available if you want to freeze the display sooner. Automatic shutoff after two minutes is intended to conserve battery power.

## Strengths

This meter covers several routine checks with one device rather than requiring separate TDS and temperature testers. The larger backlit LCD, automatic reading lock, and chart on the back are practical touches when comparing samples or recording a result. It is factory calibrated and described as ready to use without user calibration.

Buyer feedback is positive about ease of use and screen readability, with some reporting quick results. Accuracy opinions are mixed: some buyers find readings consistent, while others describe them as inconsistent. Temperature feedback is mixed too, including reports of readings that seem low or take longer to settle. Treat results as a useful comparison point, especially when monitoring a filter, rather than as a definitive test of water safety.

A solid pick if you want one meter for routine TDS, EC, and temperature checks across several water sources. It may not suit you if you need a test that identifies specific contaminants, the listed readings measure broad water properties, not a contaminant-by-contaminant breakdown.

## Key specifications

- Name: MEXYBE A2 4-in-1 digital water tester
- Measurements: TDS, electrical conductivity (EC), Celsius and Fahrenheit temperature
- TDS range: 0–9999 ppm
- EC range: 0–9999 us/cm
- Temperature range: 0.1–80.0 °C, 32.0–176.0 °F
- Listed accuracy: ±2% F.S.
- Features: Backlit LCD, automatic lock, manual hold, automatic temperature compensation, two-minute auto-off, factory calibration
- What’s included: TDS meter, instruction guide with TDS data sheet, and color box

## Practical questions

What does the meter measure? It reports total dissolved solids, electrical conductivity, and temperature. TDS is a combined reading, it does not name the individual substances in a sample.

How do you take a reading? Immerse the meter between its marked lines, gently stir to remove air bubbles, and wait for the display to stabilize and lock. You can also use the hold function to keep a reading on screen.

Does it need calibration before use? The product information says it is factory calibrated and can be used directly, with no user calibration required.

## Should you buy it?

Choose the MEXYBE A2 if your main need is a compact way to compare TDS and EC readings and check temperature across household or hobby water sources. Its display, automatic lock, and reference chart support quick routine checks without a more involved testing setup. Keep the mixed buyer feedback on accuracy and temperature in mind, and choose a more specific testing method when you need to identify particular contaminants or establish that water is safe to drink.

## Images

![MEXYBE A2 4-in-1 Digital Water Tester for TDS, EC, and Temperature — 1](https://www.ofertitastop.com/i/6CdGHLzyDVajqbktz6D3ZccCBegVIWTzKMMOqDbjV4QwWYkwiKo16yrVDUECatR7UFNTwgWhfq88B8V6uF-ABdaVx9wCeLZ42frHBSXJiS7JwriCdK6KJA.jpg)

![MEXYBE A2 4-in-1 Digital Water Tester for TDS, EC, and Temperature — 2](https://www.ofertitastop.com/i/BRngR5UCL1S8lUce65nzaAQZ2jsO3YkJ7KvGKuLzLvHvMLFW3iiJ9UX92JAcZjzmcseHgQFiCGED-sf5Sb_BzXln4sQex75bnbuGJFvN7mz-LUl5smUK2g.jpg)

![MEXYBE A2 4-in-1 Digital Water Tester for TDS, EC, and Temperature — 3](https://www.ofertitastop.com/i/Id1oSCNiVn2DA5fvaAmOX-ofcEaoFW8S7fcRXAZkIIWsII8rgcUtGqMBDweqH4W1Yw0qA2WmzXnZJYIgyolOlFiJqZA--VelrsaOC1qZ9L43fpCu-2-zrg.jpg)

![MEXYBE A2 4-in-1 Digital Water Tester for TDS, EC, and Temperature — 4](https://www.ofertitastop.com/i/gPZYZHzD2-S5WUjDkvqz0lm786Yo_XRMpbzUP7QzpTgh2NIqocnwG7UsguN7ERUMSvgiipN83yI2g6jr2Mo-OgiHFF8-aKzb_qSzTp_DHznKBUQz-3RQYA.jpg)

![MEXYBE A2 4-in-1 Digital Water Tester for TDS, EC, and Temperature — 5](https://www.ofertitastop.com/i/nJ4qDou6mEp3hUXV6O5T6tSzX9uD2uB2JYkdnWybz-hIYu3oh9hBE0uQP86OSPqVlyQWO3DDhh1cDf4Yuu6p6NqsM675qUembpgcmzp2G88qH5vC3TxMaA.jpg)