Case Studies

Lake Adventure Sewage Treatment Plant

Welcome to Lake Adventure, a nice, quiet community in Pennsylvania. The sewage system for this area is composed of 4 pump stations that pump sewage water to the water treatment station. Communication between the treatment station and water pumps is handled wirelessly. We have a host radio (H) at our treatment center that is unable to directly communicate with surrounding pump stations due to the many elevation fluctuations of the terrain. To overcome this problem, we have set-up a repeater remote (R) in a central location to communicate with radios located in outlying pump stations. The repeater is assembled on a relatively high ground of the terrain in order to maximize its range. The repeater remote has been attached to a telephone pole in order to give it even greater range (see picture of repeater below). This repeater is responsible for communicating with pump stations 2, 3, and 4, which are located around the Lake Adventure Facility. The radio at pump station 4 acts as a relay for pump station 1, because the radio at this station can’t communicate directly with the repeater due to the terrain and remote location of the site Refer to the aerial picture above of Lake Adventure to get an overview of the host, repeater, and pump station locations.

When the water reaches a certain level at each pump station, it begins getting pumped to the treatment plant. Each station has a 4-20 mA water flow rate signal (a Badger Mag Meters product), which begins sending information to the host radio when the station starts pumping sewage water. In the event that a pump malfunctions, each station is armed with a high wet well contact. Similar to the flow rate signals, this contact triggers an alarm at the water plant when the water reaches a certain level at each station. Its purpose is to indicate to someone at the water plant that something is wrong at a pump station. For a visual diagram of the radio set-up at each pump station, click on the link below:

Lake Adventure RCI Diagram

Remote Tank Monitoring using the RCI-XXX-FSK Lease-Line Telemetry Units

A municipal water company had approached us in early-2002 about a need they had to remotely monitor the water level in an elevated tank. The scope of the project included the requirements to read tank level sensors continuously, monitor alarm contacts and to utilize a license-free radio link.

The elevated tank is located outside the town of Sandusky Ohio. The main water plant, where the remote signals are required, is located about 1.5 miles away from the tank. There are some stands of trees in the vicinity and hence there is no clear line-of-sight at this location.

Pribusin Inc. provided a solution using two RCI-200-RF9 900MHz license-free radio telemetry units, one at the tank and one at the main water plant. The remote unit at the elevated tank was connected to the tanks’ water level sensors and high-level alarms. The host unit at the water plant was producing an exact replicate of the remote signals to the local control system that operates pumps and alerts operators of any problems. The system provides continuous signal exchange between the host unit and the remote unit. Signals can be sent in both directions, but this project did not have any requirements for signals to be sent back from the water plant to the elevated tank. The installation was completed successfully by local installers with very little knowledge of installing radio systems.

All project criteria were met and the system performed its required task.

Remote Site Management in Alaska using the RCI-XXX-RF2 2.4 GHz Wireless Telemetry Units

An environmental cleanup company had approached us in mid-2000 about a need they had to remotely monitor and control petroleum spillage reclamation equipment in Alaska. The scope of the project included the requirements to read tank level sensors, activate switching valves and operate autonomously.

The cleanup site was a closed-down NAVY base located on Adak Island, part of the Alaskan Aleutian Island chain. The cleanup equipment was to extract fuel-oil spills from the ground and store it in tanks for later removal by ship. The remoteness of the site provided no communication lines and no power source so that all equipment was to be solar powered.

Pribusin Inc. provided a solution using four solar powered RCI-200-RF2 2.4GHz license-free radio telemetry units at four different extraction sites. The RCI remote units provide the required analog and digital bi-directional signal transfer. These four units communicate with a central RCI-800-RF2 host unit which in turn communicates via a satellite data modem to a PC at the company’s head office in Seattle, WA. The PC is running custom software that shows the levels of the various tanks, battery voltage and lets the operator activate various solenoids. This setup allows the operators to keep track of the autonomous extraction process and make minor control modifications without having to travel or remain on-site.

All project criteria were met and the system performed its required task.

Remote Tank Monitoring using the RCI-XXX-RF2 2.4GHz Radio Telemetry Units

An industrial company had approached us about a need they had to remotely monitor the water level in an underground storage tank. The scope of the project included the requirements to read the tank level sensor continuously, operate without external power and to utilize a license-free radio link.

The system is located in Syracuse, NY. The main plant, where the remote signal is required, is located about half a mile away from the underground tank. The remoteness of the tank provided no power source so that the remote unit was to be solar powered.

Pribusin Inc. provided a solution using a solar powered RCI-200-RF2 2.4GHz license-free radio telemetry unit mounted above-ground near the tank and an RCI-200-RF2 host unit at the main plant. The RCI remote unit provides the required analog signal transfer to the host unit. The solar system incorporates batteries to keep the system operational during non-sunlight hours and days of low sunlight conditions. This setup allows the operators to keep track of the tank level without running the risk of an overflow. The installation was completed successfully by local installers requiring very little knowledge of installing telemetry systems.

All project criteria were met and the system performed its required task.

Remote Tank Monitoring using the RCI-XXX-RF9 900 MHz Wireless Telemetry Units

A municipal water company had approached us in mid-2002 about a need they had to remotely monitor the water level in an elevated tank. The scope of the project included the requirements to read tank level sensors continuously, monitor alarm contacts and to utilize a license-free radio link.

The elevated tank is located outside the town of Sandusky Ohio. The main water plant, where the remote signals are required, is located about 1.5 miles away from the tank. There are some stands of trees in the vicinity and hence there is no clear line-of-sight at this location.

Pribusin Inc. provided a solution using two RCI-200-RF9 900 MHz license-free radio telemetry units, one at the tank and one at the main water plant. The remote unit at the elevated tank was connected to the tanks’ water level sensors and high-level alarms. The host unit at the water plant was producing an exact replicate of the remote signals to the local control system that operates pumps and alerts operators of any problems. The system provides continuous signal exchange between the host unit and the remote unit. Signals can be sent in both directions, but this project did not have any requirements for signals to be sent back from the water plant to the elevated tank. The installation was completed successfully by local installers with very little knowledge of installing radio systems.

All project criteria were met and the system performed its required task.