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Industrial Test Systems 480042 SenSafe John&#39 Review

3

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Average

Revainrating 3.5 out of 5  
Rating 
3.3
🔬 Substance Analysis Instrumentation, 🔍 Test, Measure & Inspect

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Reviews

Global ratings 3
  • 5
    1
  • 4
    1
  • 3
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  • 2
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  • 1
    1

Type of review

Revainrating 5 out of 5

Perfect for my hot tub!

Use this to test copper, the measurements seem fine and I can adjust the water in the hot line accordingly. With a few test strips it should last a while.

Pros
  • Lab Supplies
Cons
  • Skimpy Instructions

Revainrating 1 out of 5

We had super high rates so we tried several times.

They DO NOT work. We got super high readings so we tried deionized water several times (meaning there are no ions in the water meaning no copper can be present) and it showed the darkest colour, indicating the presence of 2mg/L.

Pros
  • Industrial & Scientific
Cons
  • No power

Revainrating 4 out of 5

A note to spa users: vague instructions

Overall I am pleased with the product but wanted to point out a vague point in the instructions. strip for 15 seconds in 75 degree water. When I first used the product I thought I would have to take a sample and wait for it to cool down to 75 degrees. After further research I found that the dive time depends on the water temperature and the manufacturer supplies an instruction manual that lists the dive time as a function of temperature. For spa water (typically 95-105 degrees), the immersion…

Pros
  • Lab Supplies and Supplies
Cons
  • So far so good