SDI Sensor - 1 1/2" to 36"

The Data Industrial SDI Series flow sensor offers unparalleled performance for liquid flow measurement in closed pipe systems in an easy to install economical package. Impeller sensors offer a quick response to changes in flow rate and are well suited to flow control and batch type applications in addition to flow monitoring. The new four-bladed impeller design is rugged, non-fouling and does not require custom calibration. Coupled with the proprietary patented digital detection circuit, the sensor measures flows from under 0.3 ft/sec to over 20 ft/sec regardless of the conductivity or turbidity of the liquid. The standard frequency output produces a low impedance square wave signal proportional to flow rate that may be transmitted up to 2000 feet without amplification. Models are available to measure flow in one or both directions.
 

Insert Sensors

SDI insert style flow sensors are intended for general flow measurement applications. They are available in either brass or stainless steel construction. The insert style sensors are intended for direct installation into pipelines through a 1" tap. The pipeline must be out of service and not under pressure at the time of installation. For any pipeline that is in service at the time of installation or cannot be de-pressurized and drained for service, Data Industrial recommends the use of our SDI hot tap models that are equipped with isolation valves.Standard sensor stem lengths accommodate pipe sizes from 1½" through 10" in diameter. Larger sizes usually require the use of hot tap models.
 

Hot Tap Sensors

Hot tap sensors feature an isolation valve and mounting hardware to install or remove the sensor from a pipeline that would be difficult to shut down or drain. In a true "hot tap" installation the sensor is mounted in the pipe under pressure by attaching a service saddle or weld-on fitting to the pipe and mounting the isolating valve to the threaded connection. A hole is then cut in the wall of the pipe through the valve using a commercial tapping machine with a 1" size cutter. Once the hole is cut, the tapping machine is removed and the valve is shut. Then the sensor assembly is mounted to the isolation valve and extended into the pipeline to measure flow. Even in new construction a hot tap sensor may be appropriate for service considerations.