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<br />OJOJ33 <br /> <br />. 2.3 STREAM GAGES <br /> <br />Sierra/Misco offers a variety of devices to measure water levels. Local <br />stream conditions often dictate which sensor is best for a given job. <br />For the Pike's Peak Regional Early Flood Warning System, Sierra/Misco <br />proposes to use pressure transducer sensors for the required stream gage <br />sites. The pressure transducer meets the 15 ft. measurement range <br />requirement. It is resistant to freezing conditions and it is easy to <br />install. <br /> <br />The proposed stream gage, 5090 Packaged Pressure Transducer, consists of' <br /> <br />5050LL--PT <br />5050 <br />5090SA <br />5050ANT <br /> <br />Pressure Transducer <br />Transmitter <br />Standpipe assembly <br />Omni Antenna with cables <br /> <br />and connectors <br /> <br />MODEL 5050LL. PT PRESSURE TRANSDUCER: The 5050LL--PT is placed in the stream <br />below the water surface. As the water levels change. corresponding water <br />pressure changes are sensed by a differential electronic pressure <br />transducer. Water levels are measured to within 1% accuracy over the <br />measured range. Barometric pressure and temperature effects are <br />automatically compensated for by the 5050LL"PT. <br /> <br />. <br /> <br />The pressure transducer produces a 0 to 5 VDC analog output for the <br />calibrated measurement range. This analog voltage is converted to a <br />digital number between 0 and 255 for transmission by the 5050 transmitter. <br /> <br />Specifications <br />0-30 ft, 0-17 ft, or 0-2.3 ft. <br />l' of range <br />0-5 VDC (analog) <br />12 VDC, 10 microamperes <br />PVC electronics and sensor housing <br />Carflex Tubing <br />Temperature Range: -40 to 80 deg C <br /> <br />5050LL--PT <br />Range: <br />Sensitivity: <br />Electrical Output: <br />Power: <br />Materials: <br /> <br />5050 TRANSMITTER: State"of--the-art CMOS components are used in the <br />microprocessor-based 5050 transmitter. Very low power requirements permit <br />annual operation using a single 9.5 amp-hour battery. <br /> <br />Sierra/Misco reliability is especially evident in the 5050 transmitter. The <br />latest reliability statistics for the 5050 indicate that the mean-time- <br />between-'failures rate is in excess of 25 years. <br /> <br />Each transmitter has the maximum capacity to accommodate 16 analog sensors <br />and 4 digital sensors. For the 5090 Packaged Pressure Transducer. the 5050 <br />transmitter is configured with two digital input channels and one analog <br />channel. <br /> <br />. <br /> <br />Messages can be transmitted to the base station at pre-selected timed <br />intervals or in 'event' mode. Digital channels are always transmitted in <br />