---
product_id: 225301796
title: "LLC AI209-T Value Series PH20 pH Tester Combo Kit with 8 oz. calibration buffers (4,7,10), 4 oz. 3M KCL Storage Solution, Probe Cleaning Brush & CalPod Solution Holder"
brand: "apera instruments"
price: "₩399209"
currency: KRW
in_stock: true
reviews_count: 6
url: https://www.desertcart.kr/products/225301796-llc-ai209-t-value-series-ph20-ph-tester-combo-kit
store_origin: KR
region: South Korea
---

# Fast response speed IP67 waterproof & dustproof 3-point auto calibration LLC AI209-T Value Series PH20 pH Tester Combo Kit with 8 oz. calibration buffers (4,7,10), 4 oz. 3M KCL Storage Solution, Probe Cleaning Brush & CalPod Solution Holder

**Brand:** apera instruments
**Price:** ₩399209
**Availability:** ✅ In Stock

## Summary

> 🧪 Stay ahead with precision — because your measurements deserve the best!

## Quick Answers

- **What is this?** LLC AI209-T Value Series PH20 pH Tester Combo Kit with 8 oz. calibration buffers (4,7,10), 4 oz. 3M KCL Storage Solution, Probe Cleaning Brush & CalPod Solution Holder by apera instruments
- **How much does it cost?** ₩399209 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/225301796-llc-ai209-t-value-series-ph20-ph-tester-combo-kit)

## Best For

- apera instruments enthusiasts

## Why This Product

- Trusted apera instruments brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Effortless Calibration:** Smart 3-point auto calibration with buffer recognition saves time and eliminates guesswork.
- • **Built for Real-World Use:** IP67 waterproof rating and up to 2000 hours battery life empower uninterrupted testing anywhere.
- • **Cost-Saving Organization:** Unique CalBox design reduces buffer solution waste by 50%, keeping your lab tidy and efficient.
- • **Maximized Probe Longevity:** Includes probe cleaning brush and 3M KCL storage solution to extend sensor life and maintain accuracy.
- • **Precision at Your Fingertips:** ±0.1 pH accuracy with auto temperature compensation ensures reliable readings in any environment.

## Overview

The Apera AI209-T PH20 Value Series pH Tester Combo Kit delivers professional-grade accuracy (±0.1 pH) with fast response times and smart 3-point auto calibration. Designed for diverse applications from hydroponics to brewing, it includes essential calibration buffers, a probe cleaning brush, and a unique CalBox to organize and extend buffer life by 50%. Its IP67 waterproof design and long battery life ensure dependable performance in any setting, making it the go-to pH meter for millennial professionals who demand precision and efficiency.

## Description

"The top-rated pH tester on desertcart now comes with a complete calibration and probe care combo kit, including 3 bottles of 8oz pH calibration solutions (pH 7, 4 & 10), one 4oz 3M KCL storage solution, a probe cleaning brush, and Apera's unique CallBox for organizing all the solutions and efficient use of buffer solutions (help you save the cost on buffers by at least 50%). Performing pH calibration in fresh and clean calibration solutions regularly is critical to the reliable performance of pH meters. As a rule of thumb, we recommend calibrating your pH meter at least once a week. And each batch of calibration solutions should be replaced after 10-15 times of calibration. With Apera's Callbox and 8oz calibration solutions, users can perform up to 150 times of calibration. The probe cleaning brush that comes with the kit can help you easily remove contaminants on the glass bulb sensor without any damage, maximizing the life span of your pH probe.The PH20 Value pH Tester is designed for all kinds of regular water solutions pH test, including hydroponics, pools and spas, water treatment, aquariums, aquaculture, beer brewing, winemaking, cooling towers, etc. Up to 3 points of auto. calibration and 0 to 50˚C Auto temperature compensation (ATC), ±0.1 pH Accuracy with 0 to 14.0 pH measuring range; auto. recognition and auto. indication of stable readings saves you the trouble of guessing when to manually hold measurement. With a clear large screen, it supports dual display of Temp./pH value and indicators of completed calibrations (where L/M/H indicate 3 points of calibrations) and stable readings (with a smiley face). Smart self-diagnosis, warning of out-of-range measurement and incorrect calibrations. IP67 waterproof and dustproof. Up to 2000 hours' continuous operation powered by AAA batteries (with low power warning and Auto power off in 8 min if no operation). 6-Month on the the probe. "

Review: Meter must be kept moist. - These PH meters are supposed to have water in the cap they must be kept moist. When I received it, it had zero water in the cap. This is why it would not calibrate properly or read properly. I am returning item.
Review: Value is for sure the main factor. I have used it for a few months on a every couple of days basis and it's worked wonders. Only calibrated once upon arrival and once after 50-75 uses. I wish the sensors were replaceable just in case something ever did happen BUT I suppose that's fair due to the price in relation to the next model up. I use mine for plant feeding and I use very little nutrients or additives with reverse osmosis water and I would advise you be patient for the reading and giving it a minute or two to stabilize. I've only needed to do this with reverse osmosis water because of I believe the lack of particles in the water for a more prompt/accurate reading. This is fair and mentioned in the manuals also. In those situations a little shake and wait for it settle is wise. I know it's not due to the meter because before and after reverse osmosis water tests if I put the pen into PH 7.0 test solution it's almost instantly reading exactly 7.0. I love the test rack it comes with because you can reuse sooooo much of the test solutions. As novel as it looks and not of potential value to some but I found it to be of massive value because of the test solution cost savings but furthermore, mostly because the tray is perfectly fitted for the knock of the test pen and holds it in very stable positions. It also feels that it's weighted just right once the chambers have some solutions in the to hold the pen without hight likelihood of a tipping over test pen while in tray. I love the case it came with, very tidy and Profesional. My constructive feedbacks are (aka I wish it could or had this). -Backlight for digital display -Set desired PH target figure or PH desired range figure. Be notified on display or with audio once those set values are reached. More clear instructions on how to store both short term and long term without use to preserve sensors while not in use. Finally a spare washer or two for the pH pen and liquid sample capsule contact around the neck of the pen. (plastic seals can stretch a minute amount during use over time and possibly leak some of the storage solution provide. My only challenge with the order was that my storage solution cap was not well fastened and slowly dripped into the box and almost half the content was unfortunately lost. On a interesting side it appeared as though the solution leaking eventually dried and created a bond to the bottle and prevent added leaks and loss of product. Last but not least the black "fill" to line on the test liquid cup washes off promptly likely due to chemicals being tested. I used a piece of scotch tape to replicate the fill level line without it washing off again and resolved the challenge with ease. Summary, if you are good with unit and gently clean, store it right and be gentle then you have a very reliable, accurate and Profesional grade unit I would highly recommend.

## Features

- The top-rated pH tester now comes with a complete CALIBRATION and PROBE CARE Combo Kit, ensuring reliable test performance
- Comes with a probe cleaning brush for easy removal of contaminants on probes, maximizing probe's life-span
- Comes with Apera's unique CalBox, heping you organize all the solutions and save cost on buffers by at least 50%
- Apera quality pH sensor with low impedance, greatly improving response speed and shorteninb stablizing process
- Easy auto. calibration with buffer recognition; auto. temp. compensation (ATC) ensures accuracy in various temperatures (32 to 122˚F)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B077Z6LF91 |
| Batteries | 4 AAA batteries required. (included) |
| Batteries Required? | Yes |
| Batteries included? | Yes |
| Battery Cell Type | Alkaline |
| Best Sellers Rank | 93,939 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 165 in Lab pH Meters |
| Colour | Combo Kit |
| Customer Reviews | 4.6 4.6 out of 5 stars (792) |
| Date First Available | 7 Dec. 2017 |
| Included Components | AI209-T PH20 Tester Combo Kit |
| Item Package Quantity | 1 |
| Item Weight | 1.5 kg |
| Item model number | AI209-T |
| Manufacturer | Apera Instruments |
| Material | Polycarbonate Glass HDPE |
| Measurement System | US |
| Part Number | AI209-T |
| Product Dimensions | 17.78 x 4.06 x 3.04 cm; 1.5 kg |
| Size | Combo Kit |
| Style | Combo Kit |

## Images

![LLC AI209-T Value Series PH20 pH Tester Combo Kit with 8 oz. calibration buffers (4,7,10), 4 oz. 3M KCL Storage Solution, Probe Cleaning Brush & CalPod Solution Holder - Image 1](https://m.media-amazon.com/images/I/612b36RUNML.jpg)

## Questions & Answers

**Q: When calibrating, should i wait until the pen reaches the ph the solution should be before i go to the next step. or when the smiley face pops up?**
A: Smiley face. That said, when taking readings, even in the calibration solution, remember to swirl the meter in the solution with some briskness. I found that my pH pen continues to walk down or walk up almost a half a PH point just from swirling it in the solution.

**Q: So does this ph tester come pre calibrated? Thats what the user manual makes it sound like. I already have the 7 & 9 range just not 10.**
A: The base pen comes with enough solution to last at least a year of biweekly checking/  calibrating. The full kit comes with big bottles of all 3 ph ranges and a storage solution. I havnt even had to open my large bottles.  But I plan to next month just to exchange my small bottles (I've used for almost a year now) 
I have maybe had to calibrate 2 times and that was just to be safe. My water stays the same so I know what it is before and after my nutrient feeds so if it ever reads off, I just check it on a solution for the proper readout.

**Q: Anybody had success using this for fermentation? I'm hoping to find one that's easy to use/store that I can use for fermenting hot sauces, etc.**
A: I use mine specifically for Horticulture and I have zero experience in fermentation; that said, I believe this will still be a great tool for your purposes.

**Q: Can this tester be used to test ph for medical / intravenous solutions? i am looking for something that is accurate to ~0.1ph. any experience?**
A: It does measure to the tenth (0.0).  The other Apera model PC60, measures to the hundredth (0.00).

I use the PH20 and noticed when making changes to your solution, change down reads fairly quickly. Changes to raise PH reads more slowly, so give it a few minutes to stabilize the reading.

Also I use the 7.0 calibration fluid in the cap when storing between uses.  Helps notice if recalibration is needed.
Always rinse and dry probe before storing or testing.

## Customer Reviews

### ⭐ Meter must be kept moist.
*by G***E on 2 November 2025*

These PH meters are supposed to have water in the cap they must be kept moist. When I received it, it had zero water in the cap. This is why it would not calibrate properly or read properly. I am returning item.

### ⭐⭐⭐⭐⭐ Review
*by X***Z on 14 April 2019*

Value is for sure the main factor. I have used it for a few months on a every couple of days basis and it's worked wonders. Only calibrated once upon arrival and once after 50-75 uses. I wish the sensors were replaceable just in case something ever did happen BUT I suppose that's fair due to the price in relation to the next model up. I use mine for plant feeding and I use very little nutrients or additives with reverse osmosis water and I would advise you be patient for the reading and giving it a minute or two to stabilize. I've only needed to do this with reverse osmosis water because of I believe the lack of particles in the water for a more prompt/accurate reading. This is fair and mentioned in the manuals also. In those situations a little shake and wait for it settle is wise. I know it's not due to the meter because before and after reverse osmosis water tests if I put the pen into PH 7.0 test solution it's almost instantly reading exactly 7.0. I love the test rack it comes with because you can reuse sooooo much of the test solutions. As novel as it looks and not of potential value to some but I found it to be of massive value because of the test solution cost savings but furthermore, mostly because the tray is perfectly fitted for the knock of the test pen and holds it in very stable positions. It also feels that it's weighted just right once the chambers have some solutions in the to hold the pen without hight likelihood of a tipping over test pen while in tray. I love the case it came with, very tidy and Profesional. My constructive feedbacks are (aka I wish it could or had this). -Backlight for digital display -Set desired PH target figure or PH desired range figure. Be notified on display or with audio once those set values are reached. More clear instructions on how to store both short term and long term without use to preserve sensors while not in use. Finally a spare washer or two for the pH pen and liquid sample capsule contact around the neck of the pen. (plastic seals can stretch a minute amount during use over time and possibly leak some of the storage solution provide. My only challenge with the order was that my storage solution cap was not well fastened and slowly dripped into the box and almost half the content was unfortunately lost. On a interesting side it appeared as though the solution leaking eventually dried and created a bond to the bottle and prevent added leaks and loss of product. Last but not least the black "fill" to line on the test liquid cup washes off promptly likely due to chemicals being tested. I used a piece of scotch tape to replicate the fill level line without it washing off again and resolved the challenge with ease. Summary, if you are good with unit and gently clean, store it right and be gentle then you have a very reliable, accurate and Profesional grade unit I would highly recommend.

### ⭐⭐⭐⭐⭐ Review
*by M***T on 24 October 2025*

Je recommande cet appareil. Il est facile à utiliser et précis.

## Frequently Bought Together

- APERA INSTRUMENTS AI209-T Value Series PH20 pH Tester Combo Kit, including the Maintenance Set, and a CalPod Solution Holder for Easy Calibration
- General Hydroponics pH Control Kit For A Balanced Nutrient Solution
- Apera Instruments AI213 Value Series TDS20 Waterproof TDS Pocket Tester kit, Accuracy: ±1% F.S, 2-Point Auto. Calibration

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.kr/products/225301796-llc-ai209-t-value-series-ph20-ph-tester-combo-kit](https://www.desertcart.kr/products/225301796-llc-ai209-t-value-series-ph20-ph-tester-combo-kit)

---

*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-02-13*