Apera Instruments, LLC-AI481 TN400 Portable Turbidity Meter, Infrared Sensor, ISO 7027 Compliant, EPA Approved Standard Solutions for Easy Calibration, Accuracy: ±2%+Stray Light

It's a nice, complete kit, with carrying case, extra batteries, a tiny screwdriver (for the waterproof battery hatch), and a bunch of sample jars and standards. Everything seems well built, with stable calibration/results and good resolution and range. Recommended.

We had been looking for a more economical and reliable turbidity meter to replace our aging HACH units and this fits the bill perfectly. We have 4 or 5 of these now and they are easy to use and the case it comes in is also great compared to the huge "tacklebox" style other brands come in. The replacement standards are also easy to order and use and it comes with plenty of sample vials for tests in the field. Very happy so far.

We have used this product to assess the extent of turbidity in newly made wines. The instrument provides consistent, reproducible MTU values obtained using a simple, convenient format. The results obtained have enabled accurate prediction of our wine's heat stability, essential data needed prior to bottling.

This was bought as an emergency backup for our Hach 2100 meters. We were impressed, it's as accurate at roughly 1/3 the price! Long delivery times on the Hach, not with this meter.

I would love to write a review about the performance, however, it is yet to turn on...Plugged in with the USB cable and charger head that came in box. No sign that's it's charging and all buttons unresponsive. The mute blue screen. Let's see how their support services work.UPDATE: Their customer service returned my email and they sent out a replacement unit free of charge. It works and looks to be a good device for our needs. Probably best to order straight from their website and ask that they check the unit before sending. Pleased with their resolution.

Complete package, easy to use, nice instructions, good support, seems well made. BEST feature is NO buttons. Smooth, water-proof data plate. BEST quality is that it costs 25% of the price of a new HACH 2100Q and comes with a 2 year warranty instead of a 1 year warranty! I bought TWO of these units for the cost of repairing a 3 year old Hach. I only gave it 4 stars because I haven't used it much yet so I don't know long term durability.

I have been using this meter for about a month. This meter performs very well. It is easy to use and was accurate. A very good meter for the price!

Great product. Easy to use and calibrate.