The Dwyer flow sensor is an averaging pitot tube providing accurate 
and convenient flow rate sensing. When purchased with a Dwyer 
Capsuhelic?differential pressure gage of appropriate range, the 
result is a flow indicating system delivered off the shelf at an 
economical price.




Pitot tubes have been used in flow measurement for years. 
Conventional pitot  tubes sense velocity pressure at only one point 
in the flowing stream. Therefore, a series of measurements must be 
taken across the stream to obtain a meaningful average flow rate. The
 Dwyer flow sensor eliminates the need for traversing the flowing 
stream because of its multiple sensing points and built-in averaging 
capability.




Dwyer Series DS-300 flow sensors are designed to be inserted in the 
pipeline through a compression fitting. They are furnished with 
instrument shut-off valves on both pressure connections. Valves are 
fitted with 1/8" NPT female connections. Accessories include adapters 
with ? SAE 45?flared ends compatible with hoses supplied with the 
Model A-471 Portable Capsuhelic kit. Standard valves are rated at 200 
psig (13.7 bar) and 200캟 (93.3캜). Where valves are not required, 
they can be omitted at reduced cost. Series DS-300 flow sensors are 
available for pipe sizes from 1" to 10". If replacing a DS-200 flow 
sensor or using a A-160 thredolet with a DS-300, an optional ? X 3/8"
 bushing, P/N A-161 is required.