SKU: 52434761173

Hanna HI783 Magnesium Colorimeter Marine Checker

Sale price$1631.25 Regular price$1812.50
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Ships within 48 hours · Estimated delivery Jul 24 - Jul 29

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Description

Hanna HI783 Magnesium Colorimeter Marine CheckerHanna HI783 Magnesium Colorimeter Marine Checker Hanna HI783 Magnesium Colorimeter Marine Checker is used to measure magnesium levels in saltwater environments to ensure a healthy marine aquarium system. Magnesium is a crucial element in saltwater environments, as it allows calcium and carbonate to be bioavailable for corals and other invertebrates. Therefore, consistent and accurate testing of magnesium levels in your marine aquarium is vital to

Hanna HI783 Magnesium Colorimeter Marine Checker

Hanna HI783 Magnesium Colorimeter Marine Checker is used to measure magnesium levels in saltwater environments to ensure a healthy marine aquarium system.

Magnesium is a crucial element in saltwater environments, as it allows calcium and carbonate to be bioavailable for corals and other invertebrates. Therefore, consistent and accurate testing of magnesium levels in your marine aquarium is vital to ensure a healthy and thriving system.

The HI783 Magnesium Checker HC by Hanna Instruments provides a simple, accurate, and affordable way to measure magnesium in saltwater/marine environments. Its color-coded syringes and straightforward testing strips ensure quick and hassle-free measurements, every time. With a digital readout, there is no more struggling to determine colors visually. 

  • Ideal for saltwater aquariums, marine biology, and aquaculture applications
  • Easier to use and more accurate than other chemical test kits
  • Color-coded syringes for simple and effortless testing
  • Dedicated to a single parameter
  • Simple one-button operation
  • Large LCD digital readout for added convenience
  • Auto shut-off to ensure the battery won't be drained
  • Compact size for easy travel and storage

Specifications

Range: 1,000 to 1,800 ppm Magnesium
Resolution: 5 ppm
Precision: ±5% of reading @ 77°F (25°C)
Light Source: LED @ 610 nm
Light Detector: Silicon photocell
Environment: 0 to 50°C (32 to 122°F); max 95% RH non-condensing. The prepared sample cuvette (sample plus reagents) must be 18 to 28 °C (64 to 82 °F).
Battery Type: (1) 1.5V AAA
Auto-off: After 10 minutes of non-use
Dimensions: 86 x 61 x 37.5 mm (3.4 x 2.4 x 1.5")
Weight: 64 g (2.3 oz.)
Method: Adaptation of the colorimetric EDTA method using calmagite indicator. The reaction between magnesium and the reagents causes a blue to violet tint in the sample.
Interferences: Calcium below 300 ppm and above 500 ppm
Reagent Set: HI783-25 (25 tests)
Calibration Set: HI783-11

What’s Included?

1x HI783 Marine MagnesiumChecker HC 
1x Carrying case
1x Sample cuvette and (2x) caps
1x Marine Magnesium Starter Kit (reagents for 25 tests)
1x 1mL graduated syringe and tip
1x 5mL Syringe and tip with black printing
1x 5mL Syringe and tip with blueprinting
1x 1.5V AAA Alkaline battery
1x Instruction manual
1x Quick reference guide

Terms of Sale: Please take the time to thoroughly understand and familiarize yourself with this test kit before purchasing, as the unique nature of this product means that we are unable to accept returns.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 52434761173

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Mopardodgegirl
Lexington, US
★★★★★ 5
It works! Quality pillow.
Size: Standard (1 Count), Color: Original White (Cooling)
This does actually provide a cooling effect, and it's very comfortable! The accompanying literature is helpful too. I believe this to be a quality pillow for the price.
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Reviewed in the United States on June 2, 2026
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jin
Charlottesville, US
★★★★★ 5
Most comfortable pillow I’ve ever slept on
Size: Queen (1 Count), Color: Crescent White(cooling)
This is the most comfortable pillow I have ever slept on. It doesn't mash down like other pillows. Cradles my neck perfectly plus it’s cool. I broke my neck a couple of years ago and this pillow feels very good and comfortable. Definitely recommend to everyone. Ive used it since May and it’s retained its shape.
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Reviewed in the United States on June 6, 2026
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Verified Purchase
AreTrue
Phoenix, US
★★★★★ 4
Smell
Size: Queen (2 Count), Color: Original White (Cooling)
The fact that there are not more comments on the smell of these pillows has me worried about some of yall. Listen, I LOVE the weight, and the firmness, it’s perfect for that. However, these pillows are RANK. They have a very strong mildew-ish smell that lingers. I took the outer cover off and washed it and let the pillow air out for a few days, the smell is still very strong when you press your face against it, which one does because it is in fact designed for that purpose. It smells so bad. It’s nauseating. I can smell it through two pillowcases and blanket that I threw on top of them hoping an extra layer would trap the smell. I’ll bake them in the Texas sun tomorrow and hope that helps, because otherwise these are the perfect pillows for someone who wants to feel like they are hugging a torso but can’t stand the sound/feel of someone else breathing. I don’t know…4 stars, if the smell goes away I’ll come back. Update: many many days later. Either they don’t really smell anymore or I got use to it. They’ve held their firmness and shape well. I like them.
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Reviewed in the United States on March 9, 2026
S
Verified Purchase
Samantha
New York, US
★★★★★ 5
Actually Cooling Pillow
Size: Queen (1 Count), Color: Original White (Cooling)
This is a really nice pillow, I was worried it would be too soft or too firm but it's just right and it's actually cooling, it feels cool every time I touch it. I've noticed an improvement in sleep since using it. Would recommend!
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Reviewed in the United States on May 27, 2026
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Tyler and Kaela
Los Angeles, US
★★★★★ 5
Repurchased in King Size – Still Love These Cooling Pillows
Size: King (2 Count), Color: Original White (Cooling), Size: King (2 Count), Color: Original White (Cooling)
After using the queen-size version of these pillows for over a year, we purchased the king-size set when we upgraded to a king mattress. Both my husband and I really like them. The cooling feature works well, and we like that each side feels different—when I run cold, I use the softer bamboo side, while my husband prefers the cooler side since he tends to sleep hot. They fit well in our king-size pillowcases and feel supportive in all sleeping positions, whether I’m on my stomach, side, or back. I also appreciate that you can remove some of the filling to adjust the firmness. The covers are washable, which makes them easy to maintain. Overall, we’re very happy with this repurchase and the long-lasting comfort.
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Reviewed in the United States on April 15, 2026

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