The Sper Scientific 860040 Turbidity Meter generally does a good job with regular turbidity measurements, especially within its designated range. From what we've gathered, it includes user-friendly calibration features, like a straightforward two-point self-calibration system.

Setting it up is pretty quick, often just under a minute with simple push-button controls, which makes it handy if you're doing a lot of testing.

The device comes with calibration standards of 0 NTU and 100 NTU, which should work well for most standard water testing situations. However, if you need to measure turbidity over 100 NTU, this meter might not be the best fit, as our research suggests it's great for low to moderate turbidity but struggles with higher levels due to its calibration limit at 100 NTU.

Some folks have mentioned they'd prefer something from brands like Hach if they're looking for more range in high turbidity measurements.

The meter also scores points for being portable and easy to use, with a lightweight design that makes it a breeze to take along for fieldwork or on-site tests. If your work is within its range, it should serve your needs well, offering a reliable option for routine turbidity monitoring.

In a nutshell, while the Sper Scientific 860040 is a good pick for typical water samples and more straightforward testing scenarios, if you're regularly dealing with turbidity levels above 100 NTU, you might need to think about additional equipment or a different model that can handle wider ranges.

It's great for simplicity and everyday use but might require looking elsewhere for those more specialized measurements.