---
product_id: 10464751
title: "Bluelab Guardian Monitor for pH, Temperature, Conductivity (EC/TDS/PPM) in Water, Easy Calibration, Digital Nutrient Meter for Hydroponics (MONGUA)"
brand: "bluelab"
price: "₨671"
currency: SCR
in_stock: true
reviews_count: 8
url: https://www.desertcart.sc/products/10464751-bluelab-guardian-monitor-for-ph-temperature-conductivity-ec-tds-ppm
store_origin: SC
region: Seychelles
---

# pH Precision Conductivity Metrics Temperature Monitoring Bluelab Guardian Monitor for pH, Temperature, Conductivity (EC/TDS/PPM) in Water, Easy Calibration, Digital Nutrient Meter for Hydroponics (MONGUA)

**Brand:** bluelab
**Price:** ₨671
**Availability:** ✅ In Stock

## Summary

> 🌱 Grow Smarter, Not Harder!

## Quick Answers

- **What is this?** Bluelab Guardian Monitor for pH, Temperature, Conductivity (EC/TDS/PPM) in Water, Easy Calibration, Digital Nutrient Meter for Hydroponics (MONGUA) by bluelab
- **How much does it cost?** ₨671 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sc](https://www.desertcart.sc/products/10464751-bluelab-guardian-monitor-for-ph-temperature-conductivity-ec-tds-ppm)

## Best For

- bluelab enthusiasts

## Why This Product

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

## Key Features

- • **Ready to Use:** Factory calibrated for immediate use out of the box.
- • **Stay Informed:** High/low alarms alert you to parameter changes.
- • **Built for Growers:** Designed by industry leaders in hydroponic testing.
- • **Maximize Your Grow:** Ensure optimal nutrient balance for thriving plants.
- • **Precision at Your Fingertips:** Lab-quality glass pH probe for accurate readings.

## Overview

The Bluelab Guardian Monitor is a state-of-the-art digital nutrient meter designed for hydroponics, providing precise measurements of pH, temperature, and conductivity (TDS/EC/PPM) in water. With easy calibration, high/low alarms, and a durable water-resistant design, this monitor ensures your plants receive the perfect nutrient balance for optimal growth. Made in New Zealand, it comes with a 2-year limited warranty, making it a reliable choice for serious growers.

## Description

n just one glance it clearly conveys all 3 critical parameters for successful growth: pH, conductivity AND temperature.The Bluelab Guardian Monitor is a constant indicator of the desired levels of EC/ppm 700/TDS/CF, pH and temperature, enabling the grower to optimise these parameters as the crop progresses through each growing phase.The Bluelab Guardian Monitor is mains powered and is mounted to the wall or hung on a support and the probes simply placed into the reservoir.With the Bluelab Guardian Monitor monitoring your crops 24 hours a day and with the ability to set high and low alarms, a flashing display lets you know if one parameter moves away from the ideal, allowing you to make the required adjustments quickly and effectively.Features• Large easy to read displays• No calibration required for conductivity and temperature• Simple push button pH calibration• Selectable values for conductivity and temperature • Flashing high and low alarms• Temperature compensation• Greater tolerance to RF/electronic interference provided• International power supply• Replaceable double junction pH probe• Adjustable display brightness• Non-volatile memoryProbe TipsAll probes are interchangeable between all Bluelab productsProper hydration of ph probes is vital to maintain wickAll pH probes eventually need to be replaced—they can only house so much reference solutionKCl storage solution is required for optimum probe maintenanceRO water will reduce probe life

## Features

- Monitor pH up and down, temperature, nutrient (TDS) level in water to maximize your grow and ensure plants get a balanced feed; General uses includes growing tent and reservoir; Selectable conductivity units include TDS, EC, ppm 500, ppm 700 and CF
- This hydroponics tester has ATC that provides consistent reading regardless of any fluctuations in temperature; High and low alarm when outside parameters, selectable units include TDS, EC, ppm 500, ppm 700 and CF
- Lab quality glass pH probe with easy two point calibration; Conductivity / temperature probe comes factory calibrated so it's ready to be used; Double junction probe is more accurate than test strips and drops
- Combine with Bluelab pen and meter for full garden nutrients monitoring in water and soil; Other features: International power supply, water resistant design; KIT INCLUDES: Calibration solution, EC probe and pH probe, probe care kit is sold separately
- Made in New Zealand and manufactured by Bluelab, the industry leader in hydroponic testing equipment, built for growers; 2-Year Limited Warranty with proof of purchase (6-month warranty for pH probe)

## Product Details

- **Color:** White
- **Brand:** Bluelab
- **Item Weight:** 0.48 Pounds
- **Battery Description:** No batteries required
- **Voltage:** 1

## Images

![Bluelab Guardian Monitor for pH, Temperature, Conductivity (EC/TDS/PPM) in Water, Easy Calibration, Digital Nutrient Meter for Hydroponics (MONGUA) - Image 1](https://m.media-amazon.com/images/I/71S4ykv40lL.jpg)
![Bluelab Guardian Monitor for pH, Temperature, Conductivity (EC/TDS/PPM) in Water, Easy Calibration, Digital Nutrient Meter for Hydroponics (MONGUA) - Image 2](https://m.media-amazon.com/images/I/7115ij4unbL.jpg)
![Bluelab Guardian Monitor for pH, Temperature, Conductivity (EC/TDS/PPM) in Water, Easy Calibration, Digital Nutrient Meter for Hydroponics (MONGUA) - Image 3](https://m.media-amazon.com/images/I/816iQpQWVyL.jpg)
![Bluelab Guardian Monitor for pH, Temperature, Conductivity (EC/TDS/PPM) in Water, Easy Calibration, Digital Nutrient Meter for Hydroponics (MONGUA) - Image 4](https://m.media-amazon.com/images/I/81rOSSKAFxL.jpg)
![Bluelab Guardian Monitor for pH, Temperature, Conductivity (EC/TDS/PPM) in Water, Easy Calibration, Digital Nutrient Meter for Hydroponics (MONGUA) - Image 5](https://m.media-amazon.com/images/I/71o-UMf5ZcL.jpg)

## Available Options

This product comes in different **Style** options.

## Questions & Answers

**Q: How would this hold up for saltwater aquariums. Notably, used in the sump within the cabinet which can be a humid environment ?**
A: The problem with blue lab is the led dies.  I have used 4 of these and after a year or two is a bar will go out and you cannot read the display any more. Do not buy!

**Q: can the probes stay completely submerged inside the reservoir at all times?**
A: I've had mines for about 4 months now and it's always been in my reservoir 24-7. No problem so far.

**Q: Are the probes waterproof? Can they be used underwater?**
A: Yes the probes CAN be submerged and are designed to stay in your liquid for extended periods (should be cleaned once a month)Youtube video from Bluelabs.com shows the EC/TDS/ppm probe submerged and this link from the manufacturer clearly states that you can completely submerged the PH probe:http://www.getbluelab.com/site/bluelabassist/files//Care%20and%20Use%20of%20Bluelab%20Soil%20pH%20Probes%20Aug09.pdf

**Q: I have several of these does anyone know where to get the lights placed,many have burned out.Makes it difficult to get the accurate readings I want.**
A: These lights are not replaceable. Please contact the seller so you can have this returned for manufacture warranty repair/replacement.

## Customer Reviews

### ⭐⭐⭐⭐⭐ High value for price for the "prosumer" market
*by R***8 on February 5, 2025*

I only read negative reviews to gather my opinions on a product. If you're serious about buying a product like this, consider that pH probes are not a lifetime investment due to their nature, and move on with life. This unit has a permanently fixed EC sensor, and a replaceable pH sensor. I've purchased two of these units. The first came out of the box and required no calibration as far as I could tell. The second unit came with a defective pH probe (again reference why these probes are problematic in general regardless of manufacturer)...Immediate and awesome response from Bluelab support and they are sending me a replacement probe with no issues. The reviews I've read about this company are consistent with my experience, and I cannot recommend them more.If you want to integrate your own app with their API, it's braindead simple. I cannot recommend this product more.

### ⭐⭐⭐⭐⭐ FINALLY!!!
*by T***L on June 27, 2024*

I was beginning to think a continuous PH/PPM meter that actually works even existed. Ive tried so many and the all were garbage!!Finally Bluelab actually has one that works! And this this works perfect. No more jumping PH values and wondering which value to go by on when every second you look at it sways all over the place. This one is precise and shows a perfectly steady number at all times! Now I feel more comfortable knowing I have a meter that is dependable. Yes, it costs way more than these other brands, but at least this one works. Easy calibration and popped it right in my resovoir bucket hydro system and working like a champ. Thank-you!!!

### ⭐⭐⭐⭐⭐ The PH probes are considered disposable and don't last
*by D***S on March 30, 2023*

The first one arrived with a problem so they sent me a new one that I have owned for over 3 years and only used it once for 4 months and the rest of the time it was in storage in their companies storage solution for the whole time. I needed to use it again and It would not CAL, it just did a zero count down and I contacted Bluelab to see if I was doing something wrong and they said the probe is too old. So I purchased this new in 2019 and the SN says 2009 on it and they told me it was made in 2020. Ok so they bent the truth a little LOL. Bottom line they said the probes are only warrantied for 6 months and in their words they get to old. But have no expiration. So I ask how can I get a fresh probe and they said buy direct on their website and not on Amazon as I reported I purchased from. It turns out they sell to Amazon there older stock apparently

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*Product available on Desertcart Seychelles*
*Store origin: SC*
*Last updated: 2026-01-24*