---
product_id: 9172043
title: "Hydrofarm MGMLP1 Active Air 3-Way pH, Light & Moisture Meter"
brand: "hydrofarm"
price: "HK$239"
currency: HKD
in_stock: true
reviews_count: 13
category: "Hydrofarm"
url: https://www.desertcart.hk/products/9172043-hydrofarm-mgmlp1-active-air-3-way-ph-light-and-moisture
store_origin: HK
region: Hong Kong
---

# Light range 0-2000 lux Moisture scale 0-10 pH accuracy 4-9 Hydrofarm MGMLP1 Active Air 3-Way pH, Light & Moisture Meter

**Brand:** hydrofarm
**Price:** HK$239
**Availability:** ✅ In Stock

## Summary

> 🌿 Master your garden’s vibe with the ultimate 3-in-1 meter!

## Quick Answers

- **What is this?** Hydrofarm MGMLP1 Active Air 3-Way pH, Light & Moisture Meter by hydrofarm
- **How much does it cost?** HK$239 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/9172043-hydrofarm-mgmlp1-active-air-3-way-ph-light-and-moisture)

## Best For

- hydrofarm enthusiasts

## Why This Product

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

## Key Features

- • **Precision You Can Trust:** Accurate readings with ±0.5% measurement accuracy for expert-level gardening.
- • **Battery-Free Reliability:** No batteries needed—always ready when you are, indoors or out.
- • **Compact & Durable Design:** Lightweight, sturdy plastic build fits perfectly in your toolkit or pocket.
- • **Triple-Check Your Garden's Health:** Simultaneously measure moisture, light, and pH for precision care.
- • **Optimize Every Plant’s Environment:** Balance soil pH and moisture to prevent overwatering and boost growth.

## Overview

The Hydrofarm MGMLP1 Active Air 3-Way Meter is a compact, battery-free tool that delivers precise moisture (0-10 scale), light (0-2000 lux), and pH (4-9 range) readings. Designed for both indoor and outdoor use, it helps gardeners optimize plant health by preventing overwatering and balancing soil conditions with ±0.5% accuracy, all in a durable, easy-to-use package.

## Description

Gardeners can conveniently test their moisture, light, & pH levels with the handy ActiveAir 3-WAY meter. Moisture readings register on a scale of 0 (dry) to 10 (moist), light readings range from 0 (low light) to 2000 (very strong light), & pH readings between pH 0 (acidic) & pH 10 (basic) are represented. The durable, easy-to-read tester is suitable for indoors or out & needs no batteries to operate.

Review: Best of Type in price range. - I am very impressed with this tri-function gardening meter. However my comments and experience with it are restricted to its use in container gardening where soil type is fairly consistent and of good quality. The light meter functions extremely well. (Readings taken in November in Texas at 11 am) Total shade outside on a cloudy day gives ~100 rating, cloudy day inside at a window 200-300. cloudy day outside partial shade ~500 reading cloudy day no shade 800-1000 sunny day, no shade 2000 ("pegged unit") Moisture reading also seems fairly accurate. Obviously dry container not watered for 2 weeks gave a 1 Container not watered for 5 or 6 days and dry to touch down to 4" gave a 2-3 reading. Container well watered 48 hr previously gave a 5-6 reading. Container well watered previous morning gave a 8 reading. Container OVER watered 6 hrs previously gave a 10 reading. I have not tested pH meter function in a well calibrated manner, but it seems to work well, IF the instructions are followed. You cannot just stick it in soil to get the pH reading you have to do as instructions state. I took readings with "used" potting soil amending it 4 different ways and then watering mildly and leaving set for 3 days. Soil with small amount of baking soda added gave an alkaline 8 reading, Soil with nothing added gave ~7 reading Soil with small amount of vinegar added 5-6 Soil with small amount of soil acidifier gave slightly less than 5. Can't ask for much better results for an inexpensive little unit. I have owned 2 or 3 other brands of these little gadgets (without light function) none of them gave decent or even consistent results, this one does.
Review: It works great! No reason to get anything fancy when this does all you need. - This meter will help you out in any application. From plants inside and outside, it's got you covered. I used this product to make sure my garden was a prime spot for hosting tomato plants. This helped me balance out the pH perfectly! It was also cool to see the light difference during the day and such, the meter is spot on.

## Features

- Helps prevent over watering
- Provides accurate pH values from 4-9
- Sturdy and easy to use
- Good for use indoors or outdoors
- No batteries required

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B001UC7K6E |
| Best Sellers Rank | #565,212 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #242 in Moisture Meters |
| Brand | Hydrofarm |
| Brand Name | Hydrofarm |
| Customer Reviews | 4.0 out of 5 stars 237 Reviews |
| Global Trade Identification Number | 00638104190251 |
| Item Dimensions | 13.25 x 3.8 x 1.2 inches |
| Item Type Name | Meter |
| Item Weight | 3.2 ounces |
| Item dimensions L x W x H | 13.25 x 3.8 x 1.2 inches |
| Manufacturer | Hydrofarm |
| Material | Plastic |
| Material Type | Plastic |
| Measurement Accuracy | +/-0.5% |
| Model | MGMLP1 |
| Mounting Type | Freestanding |
| Number of Items | 1 |
| Output Type | Digital |
| Part Number | MGMLP1 |
| Specific Uses For Product | gardening, farming, indoor, outdoor, pH measurement, light measurement, moisture measurement |
| UPC | 638104190251 674551571984 |
| Unit Count | 1 Count |
| Upper Temperature Rating | 40 °C |
| Warranty Description | 1 year warranty. |

## Product Details

- **Brand:** Hydrofarm
- **Item Weight:** 3.2 ounces
- **Item dimensions L x W x H:** 13.25 x 3.8 x 1.2 inches
- **Material:** Plastic
- **Measurement Accuracy:** +/-0.5%

## Images

![Hydrofarm MGMLP1 Active Air 3-Way pH, Light & Moisture Meter - Image 1](https://m.media-amazon.com/images/I/414IYr0ZFIL.jpg)
![Hydrofarm MGMLP1 Active Air 3-Way pH, Light & Moisture Meter - Image 2](https://m.media-amazon.com/images/I/61dPih2YoDL.jpg)
![Hydrofarm MGMLP1 Active Air 3-Way pH, Light & Moisture Meter - Image 3](https://m.media-amazon.com/images/I/61a7ZIMZIHL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Best of Type in price range.
*by R***Y on November 14, 2011*

I am very impressed with this tri-function gardening meter. However my comments and experience with it are restricted to its use in container gardening where soil type is fairly consistent and of good quality. The light meter functions extremely well. (Readings taken in November in Texas at 11 am) Total shade outside on a cloudy day gives ~100 rating, cloudy day inside at a window 200-300. cloudy day outside partial shade ~500 reading cloudy day no shade 800-1000 sunny day, no shade 2000 ("pegged unit") Moisture reading also seems fairly accurate. Obviously dry container not watered for 2 weeks gave a 1 Container not watered for 5 or 6 days and dry to touch down to 4" gave a 2-3 reading. Container well watered 48 hr previously gave a 5-6 reading. Container well watered previous morning gave a 8 reading. Container OVER watered 6 hrs previously gave a 10 reading. I have not tested pH meter function in a well calibrated manner, but it seems to work well, IF the instructions are followed. You cannot just stick it in soil to get the pH reading you have to do as instructions state. I took readings with "used" potting soil amending it 4 different ways and then watering mildly and leaving set for 3 days. Soil with small amount of baking soda added gave an alkaline 8 reading, Soil with nothing added gave ~7 reading Soil with small amount of vinegar added 5-6 Soil with small amount of soil acidifier gave slightly less than 5. Can't ask for much better results for an inexpensive little unit. I have owned 2 or 3 other brands of these little gadgets (without light function) none of them gave decent or even consistent results, this one does.

### ⭐⭐⭐⭐⭐ It works great! No reason to get anything fancy when this does all you need.
*by P***Y on June 9, 2014*

This meter will help you out in any application. From plants inside and outside, it's got you covered. I used this product to make sure my garden was a prime spot for hosting tomato plants. This helped me balance out the pH perfectly! It was also cool to see the light difference during the day and such, the meter is spot on.

### ⭐⭐⭐⭐ Wow, I was wasting so much water.
*by S***E on October 1, 2022*

I have a lot of potted plants in my yard, from small to very large. Since receiving this, I water so much less often and half as throughly. I live in CA where they ration our water usage and feel guilty for all the water I wasted.

## Frequently Bought Together

- Hydrofarm MGMLP1 Active Air 3-Way pH, Light & Moisture Meter
- AC Infinity UIS Control Plug, Socket Adapter to Connect UIS Smart Controllers to Outlet Devices
- AC Infinity CLOUDFORGE T3, Plant Humidifier 4.5L with VPD Humidity Controls, 10-Level Precision Vaporizer, Extendable Targeting Hose and No-Leak Seal for Grow Tents

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*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-10-02*