New SediMeter version from Lindorm

The year 2017 promises to be the most interesting year ever for the SediMeter, with many new features and even new models in the works. Lindorm has today announced a model with a built-in vibrator that shakes off particles and bubbles that are loosely attached to the sensor. Such particles offset the zero on the turbidity measurements, so getting rid of them is important for accuracy. They have had a model with a mechanical cleaner, but it is pricey, and anything mechanical in a liquid full of suspended sand is an invitation for problem. So the new vibrator model, costing no more than the base model of 2016, might be of great interest for many applications.

The new SediMeter model, SM3C, looks the same as the base model SM3A except that it is 3 cm longer to fit the vibrator.
The new SediMeter model, SM3C, looks the same as the base model SM3A except that it is 3 cm longer to fit the vibrator.

Another novelty is that it measures not just straight backscatter but also oblique backscatter, thus effectively doubling the vertical resolution of the turbidity profile.

Every second line of data represents straight backscatter (sent and received from the same detector), and the other lines represent oblique backscatter, which is the average of light sent from N-0.5 and received at N+0.5, and sent from N+0.5 and received at N-0.5.
Every second line of data represents straight backscatter (sent and received from the same detector), and the other lines represent oblique backscatter, which is the average of light sent from the one above and received at the one below, and vice versa.

This double resolution will be offered in all SediMeter versions from 2017 according to underhand information.