Series DS In-Line Flow Sensors

Use with the Dwyer® Differential Pressure Gages or Transmitters

The Series DS In-Line Flow Sensors are two Series of averaging Pitot tubes for compatible gases and liquids that provide accurate and convenient flow rate sensing, for schedule 40 pipe, when purchased with suitable differential pressure gage with appropriate range.

The Series DS-300 Averaging Flow Sensors are designed to be inserted in the pipeline through a compression fitting and available for pipe sizes from 1 to 10" (2.5 to 25.4 cm). Accessories include adapters with 1/4" SAE 45° flared ends compatible with hoses supplied with the Model A-471 Portable Capsuhelic® Gage Kit.

The Series DS-400 Averaging Flow Sensors are designed for insertion lengths up to 24" (61 cm) and include a pair of 1/8" NPT x 1/4" SAE 45° flared adapters which are compatible with hoses used in the Model A-471 Portable Capsuhelic® Gage Kit. The supplied solid brass mounting adapter has a 3/4" dia. compression fitting to lock in required insertion length and a 3/4" male NPT thread for mounting in a threaded branch connection (not included).

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Product Applications

Remediation
Natural, flare, flue, stack gas
Boiler feedwater
Cooling water
Superheated, saturated, or geothermal steam
Combustion or compressed air
Oil flow monitoring

Starting at $291.00

Ordering

Filter By

Series DS-300 Flow Sensor

Series DS-300 Flow Sensor Without Valves

Series DS-400 Flow Sensor

Series DS-400 Flow Sensor Without Valves

Grouped product items
Model	Description	Availability*	Price
DS-300-1	Flow sensor, 1" pipe size.	1-3 days*	$296.40
DS-300-1-1/2	Flow sensor, 1-1/2" pipe size.	1-2 Weeks*	$293.30
DS-300-1-1/4	Flow sensor, 1-1/4" pipe size.	1-2 Weeks*	$293.30
DS-300-2	Flow sensor, 2" pipe size.	1-3 days*	$291.00
DS-300-2-1/2	Flow sensor, 2-1/2" pipe size.	1-2 Weeks*	$293.30
DS-300-3	Flow sensor, 3" pipe size.	1-3 days*	$332.30
DS-300-4	Flow sensor, 4" pipe size.	1-3 days*	$393.20
DS-300-6	Flow sensor, 6" pipe size.	1-3 days*	$497.40
DS-300-8	Flow sensor, 8" pipe size.	1-3 days*	$625.40
DS-300-1-1/4-LV	Flow sensor, 1-1/4" pipe size, without valves.	1-2 Weeks*	$293.30
DS-300-1-1/2-LV	Flow sensor, 1-1/2" pipe size, without valves.	1-2 Weeks*	$293.30
DS-300-2-1/2-LV	Flow sensor, 2-1/2" pipe size, without valves.	1-2 Weeks*	$293.30

Specifications

Service:: Compatible gases or liquids.
Wetted Materials:: Sensor tube: 304 SS; Compression fitting: brass.
Temperature Limit:: 200°F (93.3°C).
Pressure Limit:: 200 psig (13.78 bar) at 200°F (93.3°C).
Pipe Sizes:: DS-300: 1 to 10" (2.5 to 25.4 cm); DS-400: 6 to 24" (15.2 to 61 cm).
Process Connections:: DS-300: 1/4" male NPT compression fitting included; DS-400: 3/4" male NPT compression fitting included.
Piping Connections:: DS-300: 1/8" female NPT; optional 1/8" female NPT x 1/4" SAE 45 flared adaptor sold separately; DS-400: 1/8" female NPT with 1/8" female NPT x 1/4 ̋ SAE 45 flared adapters include.
Weights:: Consult factory.

Features

Multiple sensing point measurement and built-in averaging capability eliminates the need for “traversing” the flowing stream with single point velocity pressure measurement saving time
Extremely reliable, proven technology, Pitot tubes, have been used in flow measurement for years
All models include convenient and quick-acting quarter-turn ball valves to isolate the sensor for zeroing with 1/8" female NPT valve assembly process connections.
Furnished with instrument shut-off valves on both pressure connections with 1/8" female NPT connections rated at 200 psig (13.7 bar) and 200°F (93.3°C)
Where valves are not required, they can be omitted at reduced cost
The Series DS-400 Averaging Flow Sensors are quality constructed from extra strong 3/4" dia. stainless steel to resist increased forces encountered at higher flow rates with both air and water
Economical flow indication when used with appropriate differential pressure gage
Rugged construction yields, non-clogging, stable design

Options

-LV - Less Valves (DS-300). To order, add suffix -LV.

Support Library

Product Literature

Manuals

Catalog Pages

Series DS Catalog Page

Approvals

RoHS Letter of Compliance

Drawings

Model Chart

EXAMPLE	DS	400	6	LV	Series DS-400-6-LV DS-400 Flow Sensor, 6" probe length, less valves
SERIES	DS	300 400			DS In-Line Flow Sensor DS Averaging Flow Sensor
RANGE			1 1-1/4 1-1/2 2 2-1/2 3 4 6 8 10 12 14 16 18 20 24		1" Probe Length 1-1/4" Probe Length 1-1/2" Probe Length 2" Probe Length 2-1/2" Probe Length 3" Probe Length 4" Probe Length 6" Probe Length 8" Probe Length 10" Probe Length 12" Probe Length 14" Probe Length 16" Probe Length 18" Probe Length 20" Probe Length 24" Probe Length
OPTIONS				LV ST	Less Valves Stainless Tag

FAQ

Questions

Question

How many sensing points are there on a 6" DS-300 In-Line Flow Meter?

Answer

The 6” DS flow sensor has 4 sensing holes. (3” and larger all have 4 holes, sensors smaller than 3” have 2 holes).

Related

Series DS

Question

I have a question about the Series 160 Pitot tube. I am wondering whether you can use this as a water flow measurement instead of air flow measurement. Best, Thanks

Answer

Our Series 160 pitot tube is specifically designed to monitor or control air velocity or air flow and not water flow. Our Series DS in-line flow sensors can be used for flow rate sensing of compatible gases and liquids for schedule 40 pipe.

Related

Series 160

Series DS

Question

Do you have a flow calculation program that calculates differential pressure from DS400 when given flow rate, temperature & pressure?

Answer

Yes you can find the DS Flow Calculator on our website dwyer-inst.com under DS In-Line Flow Sensors. On the DS page click on the Apps tab and that will bring you to the Air Velocity and Flow Calculator and Series DS Flow Calculator.

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