DN Series Vortex Flow Sensor
Frequency Output – 1/4″ to 1.0″ Pipe Sizes, Rugged Molded PPA Construction
Description:
The DN series vortex flow transmitters are designed with equipment manufacturers in mind and are an excellent economical choice for system flow monitoring and control.
The DN series vortex flow transmitters are designed with equipment manufacturers in mind and are an excellent economical choice for system flow monitoring and control.
The transmitters work on the principle of Kármáns vortex trail, named after Theodore von Kármán’s mathematical description of the phenomenon. Vortex shedding flowmeters present the flow in a pipe with an obstruction/bluff in the flowmeter body. As velocity increases, alternating vortices are formed on each side of the bluff body and travel downstream.
The DN series utilize piezoelectric sensors embedded in a ETFE vane located downstream of the bluff to detect the generated vortices. The frequency measured represents the flow velocity. A flow factor is provided to convert frequency to volume flow rate for each model size.
The minimum measured flow rate is dependent on the viscosity of the fluid.
Versions with a 1000 Ohm RTD temperature sensor built-in to the bluff are available.
Features:
- Low cost product with high levels of accuracy
- Temperature in-sensitive measuring principle
- Excellent media resistance (measuring element not in contact with the media)
- Minimal pressure loss
- Measuring element not sensitive to debris
- Direct temperature measurement in the medium
Specification:
- Medium: Suitable for water & water glycol based heat exchange systems with the usual additives and other fluids compatible with the materials of construction (consult factory).
- For media with viscosity greater than 2 millipascal seconds (2 centipoise), higher flow rates are required to form vortices raising the minimummeasurable flow rate value.
- Flow ranges: From 0.24 to 39.6 GPM (0.9 … 150 litres per minute).
DN420 Vortex Flow Transmitter
Loop Powered, 2-Wire, 4-20 mA & Frequency Output , 1/4” to 3/4” Pipe Sizes
Description:
The DN420 series vortex flow transmitters are loop powered. They are an excellent and economical choice for liquid media flow monitoring and control in 1/4” to 3/4” piping systems.
The transmitters work on the principle of Kármáns vortex trail, named after Theodore von Kármán’s mathematical description of the phenomenon. Vortex shedding flowmeters present the flow in a pipe with an obstruction/bluff in the flowmeter body. As velocity increases, alternating vortices are formed on each side of the bluff body and travel downstream.
The DN420 series utilize piezoelectric sensors embedded in an ETFE vane located downstream of the bluff to detect the generated vortices. The frequency measured represents the flow velocity. A flow factor is provided to convert frequency to volume flow rate for each model size. Each model is provided with a frequency/pulse output and a linear 4-20 mA output proportional to flow.
The minimum measured flow rate is dependent on the viscosity of the fluid.
Versions with a 1000 Ohm RTD temperature sensor are optionally available.
Features:
- Low cost product with high levels of accuracy
- Temperature in-sensitive measuring principle
- Excellent media resistance (measuring element not in contact with the media)
- Minimal pressure loss
- Measuring element not sensitive to debris
- Direct temperature measurement in the medium
Specification:
- Medium: Suitable for water & water glycol based heat exchange systems with the usual additives and other fluidscompatible with the materials of construction (consult factory).
- For media with viscosity greater than 2 millipascalseconds (2 centipoise), higher flow rates are required to form vortices raising the minimum measurableflow rate value.
- Flow ranges: From 0.24 to 39.6 GPM (0.9 … 150 litres per minute).
DN420 Vortex Data Sheet DN420 Vortex Manual
