D-Opto Photo Galleries

D-Opto sensors are in deployment around the world. We want to keep information posted on the web about uses and placements in the field. What better way than through photos. Send us your photos and feedback and we will post them on the site for other to read.

Shouldn’t everyone know they are best DO sensors!

Gallery one

A simple wiring diagram for connection.

Gallery Two

An upgraded site to measure DO using a D-Opto sensor. A reference staff gauge for waterlevel and the telemetry package already at site. The wiring panel of the D-Opto is visible in the cabinet. This allows a notebook to be plugged directly into the panel for communications from a PC to the sensor.

Gallery Three

A sensor being pulled out after 4 weeks in the drink…. Perfect condition.

These sensors are put in a 150mm (6 inch) pipe that is perforated. This prevents growth of foul by removing photosynthesis as a growth influence. This also protects the sensors for debris floating downstream.

Gallery Four

A pair of loggers going to an Australian University.

Gallery Five

The window and interface board.

Gallery Six

Eight brand new D-Optologgers bound for a Canadian University.

We have sold over 15 loggers to Canadian groups in the first 3 months of 2006. D-Optologgers are the only autonomous optical dissolved oxygen logger and the best and easiest on the market.

Gallery Seven

We were lucky to have demand for units during development. This site houses two units in two different formats. A 4-20 model without the biofoul ring and a standard D-Opto SDI-12 production model.

This site is located downstream of a paper mill discharge. Biofoul is always an issue with sensor deployments but the additional contaminates in this stream proved quite difficult.

The difference in the two systems showed that the biofoul ring served is purpose such that cleaning was only needed every other trip as compared to the non ringed unit.

Automatic cleaning requested.

The 4-20 model was developed without the copper ring but allowed for air blast cleaning. The client found due to the remoteness of the site that a modification to the D-Opto incorporating air clean into the model would reduce service visits and costs.

You can see we have placed a copper ring on the 4-20 sensor as well (we just glued it on). The sensors slide up and down the plastic tubes and the sensor head pokes out a hole in the cap at the bottom, this ensures the sensors are always installed at the same height and are clear of the silt.

We have the sensors on a hourly clean schedule of 60 seconds duration in which compressed air is blasted across the face of the sensors. An iQuest DS-4483 controls the cleaning and logs data from the sensors. Data is sent real-time to the paper mill.

Gallery Eight

A D-Opto sensor used to measure dissolved oxygen in a reservoir from a floating platform. A fantastic job on the buoy guys!

The D-Opto is approximately 9m down in 10m of water, suspended from the buoy. The dam is wide and shallow. The buoy itself is located approx 25 – 30m away from an aerator that lies on the bottom of the dam. Basically the client wanted to monitor the DO near an intake on the dam wall and decide when to turn the aerator on and off.

Gallery Nine

45° S Latitude

The southernmost longterm deployment D-Opto. Even this far south biofoul is prevalent.

Here are some photos of the D-Opto after 12 days of low flows before cleaning. Sorry they are a bit blurry. Our digital camera is not good at close-ups.