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🔬 CQRobot Ocean-Friendly Scientific Laboratory Solution Review

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Very good

Revainrating 4 out of 5  
Rating 
4.0
🔬 Substance Analysis Instrumentation, 🔍 Test, Measure & Inspect

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Description of 🔬 CQRobot Ocean-Friendly Scientific Laboratory Solution

Wide Voltage Input: 3.3V to 5.5V. Good Compatibility Output: 0 to 2.3V analog signal output, compatible with 5V or 3.3V controller. AC Excitation Source: effectively prevent probe from polarization, Waterproof Probe. Easy to Use: Arduino compatible, simple connection, plug and play without soldering. Used with ADS1115 16-Bit ADC Module (ASIN: B08KFZ3PVT, Model: CQRADS1115), Compatible with Raspberry Pi Motherboard. Note: When using the TDS instrument sensor, the sensor probe is immersed in liquid, and the purchaser needs to Separate the sensor Probe Protective Cover to avoid incorrect data reading and malfunction.

Reviews

Global ratings 3
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Type of review

Revainrating 4 out of 5

WikiPage Pi example not working

The build quality of the product is excellent. I was able to hook it up to my Raspberry Pi in minutes using an ADC. However, the setup instructions on their wiki page are not very clear. I noticed that other CQRobot products wiki page has a zipped file with test code, but not this one. I spent several hours trying to find a solution.

Pros
  • Ease of use: Arduino compatible, easy connection, plug and play without soldering.
Cons
  • Some bugs

Revainrating 5 out of 5

Solid probe suitable for testing, measuring and testing

This is a very interesting sensor that you can use to check the TDS level of liquids. It uses an analog signal to output data, since the Arduino has an ADC port this made it easy to get started. The data lets you read the PPM of liquids, so I decided to try a few different inputs: filtered water from my fridge, rainwater, and unfiltered tap water. It was interesting to see that the PPM reading was slightly higher with unfiltered tap water, but I realized that after that I really had no way of…

Pros
  • Note. When using the TDS instrument's sensor, the sensor sensor is immersed in liquid, and the customer must remove the sensor sensor protective cover to avoid false readings and malfunctions.
Cons
  • Older model

Revainrating 3 out of 5

Need documentation and better sample Code

This sensor generates an analog signal that is measured by the ADC port and Arduino. If you are using a Raspberry Pi you will need an external ADC board. CQRobot provides a board that does this and the code sample shows how to use it with Python code. I have a very reliable TDS meter that I use because we have very hard water (690-700ppm). I took four measurements on the water I had on hand: 1) no water, 2) 100% reverse osmosis filtered water, 3) 50% filtered water with 50% tap water, and 4)…

Pros
  • AC drive source: effectively prevent probe polarization, waterproof probe.
Cons
  • High Price