Stevens Chart Recorders
Stevens is the original chart recorder company for measuring water and other liquid levels. Over 40,000 of these instruments have been installed worldwide. Many are incorporated with an electronic encoder attachment to provide an undisputed, legally defensible paper source of level to any electronic sensor measuring and reporting on level. Chart recorders are still the only true real-time measurement of level in remote monitoring applications.
The Type A Chart Recorder is the world's most time-proven standard for real-time, long-term water or tank level measurement in a graphical format. The Type A is used either as a primary device or as a very reliable backup instrument to record water level. A single chart can provide up to 6 months of continuous level recording.
The newest model is the Type A-04, which features a Quartz Multispeed Timer chart drive. The Type A-04 has replaced the Type A-71.
The Type F Chart Recorder is a portable recorder that provides a continuous water or tank level record in graphical format. The Type F is used either as a primary device or as a very reliable backup instrument to record water or tank level. A single chart can provide up to 32 days of continuous level recording.
AxSys Circular Chart Recorder (CCR)
The AxSys Circular Chart Recorder (CCR) is designed to collect data on multiple parameters and to chart any one of those parameters of interest for a quick visual measurement. Typically, the CCR is used as a flowmeter that is programmed to provide instantaneous flow rate value. The CCR is physically designed for an easy Stevens 61R mechanical flowmeter retrofit.
The Stevens Electro-AV Recorder is a 10" wide strip chart recorder and data logger designed primarily for water level gaging applications and reservoir management. It accepts a serial RS-232 encoded signal, which is interpreted to produce pen movement. The signal represents an absolute level indication. Includes dedicated wire links to optional telemetry for transmission to other locations.
The optional digital display provides a continuous, 5-digit readout that exactly duplicates the transmitting device reading.
Stevens 61R Chart Recorder was installed in thousands of water and wastewater flow measurement applications. Many 61R Chart Recorders are still in operations today. Stevens still provides limited repair service to the 61R as parts are available.
The 61R was discontinued in 2000 and replaced with the Stevens AxSys CCR. The physical design of the AxSys CCR makes retrofitting existing locations with Stevens 61R Chart Recorders very easy.
The Stevens Electro Chart Drive (ECD) is an instrument that interprets signals on a SDI-12 communications line and provides an output for driving a Stevens Type A or Type F Recorder to chart any electronic level sensor gaging system such as a pressure sensor. An output is also available for input to a data logger.