Mark 1

PWA Mark 1 Telemeter

The Mark 1, with modern telemetry, advances the gauging, data capture and electronic transmitting of water quality information for both surface and groundwater sources.   This is the real time measuring, graphing, reporting and recording of water quality constituents.

Electronics are housed in a corrosion resistant, waterproof, small, polycarbonate case (4.5 x 4.5 x 2.4 inches).  The unit is set above the water, measuring stream stage with ultrasonic sonar. Up to six  Immersion probes can be added for monitoring other water quality parameters.  The Mark 1 is powered by a small solar panel.

The data, taken on a scheduled basis, is transmitted to a secure cloud server via an internal cell phone modem. Data is tabulated and graphed for ease of presentation. The graphs are then embedded into PC’s or cell phones.

Mark 1 features:

· Small, waterproof polycarbonate case 4.5 x 4.5 x 2.4 inches.

· Internal temperature and humidity sensors to monitor the Mark 1 electronic performance.

· Battery level sensor to warn of low or insufficient battery power.

· Tilt sensor for an out-of-alignment alert.

· GPS location is activated if the Mark 1 is moved from its installed position.

· Ultrasonic sonar for measuring stage

· Accommodates up to 6 additional digital or analog probes.

· Measurements taken on a scheduled or on-demand basis.

· Multiple measurements can be taken within very short time frames.

· Mean or mode of multiple measurements are computed before transmission to the cloud server.

· The cloud server graphs the readings and transmits data to a PC, laptop, tablet, cell phone or independent database server.

Mark 1 Operation

· A monitoring schedule for the Mark 1 is established.

· The data is transmitted, via cellular modem, to a secure cloud server.

· The data is graphed and embedded in your PC, or cell phone.

A Few Definitions That May Be Helpful:

Telemetry is the science and technology of automatic measurement and transmission of data from remote sources to receiving stations.

Stage is the elevation of a water surface. Stream stage is the height of the water surface above an established benchmark.  Stage is most often used with respect to the surface of a stream or river, and is used to determining the discharge of that water, but it can apply just as well to the water surface of a canal, pond or lake.

Sonar (Sound Navigation and Ranging) Sonar works by emitting pulses of sound and listening for echoes.  This is similar to today’s use of ‘pinging’ to detect Internet bandwidth speed. Ultrasonic sonar utilizes extremely high frequency pings. The Mark 1 uses sonar to detect water surface elevation or stage. When the mean velocity of the stream has been measured, a stage-discharge rating table is developed. Using this rating table, stage can then be used to determine the discharge of water passing a given reference point.