A Long History of Development

A Long History of Development

2023-12-29 0 By lindorm

The Super 8 footage in this video is about 38 years old, and it shows the second prototype of the SediMeter logger, the first one to be taken to the field, but with the first sensor prototype. The first logger used a Z80 processor like in early 80’s consumer computers. The NMOS technology consumed a lot of power, and the battery was not even Lithium, so it was only used for lab tests of the sensor idea. In this one, built in a small series, the CPU was a µPD6800 with CMOS technology, and both firmware and memory resided on a 2 kB RAM memory with internal battery (since flash did not yet exist, and EEPROM used too much power to record on). The sensor in this footage was made manually and not with a PCB, but soon after a PCB with 1 cm distance between the OBS detectors was made. By 1986 the sensor was developed, and the basics of the concept has not changed since — it has only been approved upon.

The title of the video comes from a comment from one of our U.S. customers: “Sedimeter sensors designed and built by Lindorm are a fantastic tool for measuring water column turbidity and siltation.”