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1235-8-W/M

209-AF

Series 1230/1235 Flex-Tube® Well-Type Manometers

No Moving Parts, Suitable for Laboratory or General Industry

Dwyer® Series 1230 & 1235 Flex-Tube® Well Type Manometers are designed to meet the need for a direct reading single column instrument providing highly accurate pressure readings; positive, negative or differential. Unlike other makes, Dwyer manometers have no hidden wells or packing glands. These instruments are constructed of shatter-proof clear plastic tubing permanently bonded to well assemblies with leak-proof glued joints. Well assemblies are precisely machined from solid acrylic plastic. Over-pressure safety traps assure protection against loss of fluid. Scales are adjusted with quick-acting positive mechanism. These manometers are rated to 100 psig (6.89 bar). Not recommended for vacuum service beyond 5" Hg (68" w.c.).
(Note: Red gage fluid included with -D style manometer.)

NIST CALIBRATION available in Product Configurator.

Product Applications

Laboratory and industrial service applications

Starting at $513.80

Ordering

Filter By

Panel Mount - Inches of Gage Fluid

Panel Mount - Inches of Water/Mercury

Wall Mount - Inches of Gage Fluid

Wall Mount - Inches of Water/Mercury

Grouped product items
Model	Description	Availability*	Price
1230-8-D	Well-type manometer, range 0-8.	Less Than 1 Week*	$513.80
1230-8-W/M	Well-type manometer, range 0-8, 12 oz mercury required.	3-4 Weeks*	$513.80
1230-12-D	Well-type manometer, range 0-12.	Less Than 1 Week*	$544.70
1230-12-W/M	Well-type manometer, range 0-12, 14 oz mercury required.	3-4 Weeks*	$544.70
1230-16-D	Well-type manometer, range 0-16.	1-3 days*	$577.90
1230-16-W/M	Well-type manometer, range 0-16, 16 oz mercury required.	3-4 Weeks*	$577.90
1230-20-D	Well-type manometer, range 0-20.	1-3 days*	$592.45
1230-20-W/M	Well-type manometer, range 0-20, 18 oz mercury required.	3-4 Weeks*	$592.45
1230-24-W/M	Well-type manometer, range 0-24, 20 oz mercury required.	3-4 Weeks*	$617.70
1235-12-D	Well-type manometer, range 0-12.	Less Than 1 Week*	$663.15
1235-12-W/M	Well-type manometer, range 0-12, 14 oz mercury required.	3-4 Weeks*	$663.15
1235-16-D	Well-type manometer, range 0-16.	Less Than 1 Week*	$686.35
1235-16-W/M	Well-type manometer, range 0-16, 16 oz mercury required.	3-4 Weeks*	$686.35
1235-20-D	Well-type manometer, range 0-20	Less Than 1 Week*	$726.20
1235-20-W/M	Well-type manometer, range 0-20, 18 oz mercury required.	3-4 Weeks*	$726.20
1235-24-W/M	Well-type manometer, range 0-24, 20 oz mercury required.	3-4 Weeks*	$739.45
1235-8-D	Well-type manometer, range 0-8.	Less Than 1 Week*	$638.90
1235-8-W/M	Well-type manometer, range 0-8, 12 oz mercury required.	3-4 Weeks*	$638.90

Features

Options

Support Library

Approvals

Drawings

Model Chart

1230 SERIES MANOMETERS                
     
     1230-X-X-OPT   1230 SERIES MANOMETERS
     1235-X-X-OPT   1235 SERIES MANOMETERS

          1ST SYMBOL (1ST X) RANGE       
             8       0-8 IN WC
             12      0-12 IN WC
             16      0-16 IN WC
             20      0-20 IN WC
             24      0-24 IN WC
             20CM    0-20 CM WC
             30CM    0-30 CM WC
             40CM    0-40 CM WC
             50CM    0-50 CM WC
             60CM    0-60 CM WC
           
           2ND SYMBOL (2ND X) FLUID       
             W/M    IN WC USING WATER/IN HG USING MERCURY
             D      INCHES OF WATER USING .826 SP GR RED GAGE FLUID

           OPTIONS (OPT)
             -A     TYPE A CONNECTIONS  (DEFAULT NOT REQUIRED)
                    TWO MOLDED NYLON TUBING CONNECTORS
                    RAPID SHUT OFF TYPE
                    TWO 3 FT LENGTHS FLEXIBLE PLASTIC TUBING
                    TWO 1/8 PIPE THREAD ADAPTORS
             -B     TYPE B CONNECTIONS
                    TWO MOLDED NYLON TUBING CONNECTORS
                    RAPID SHUT OFF TYPE
                    ONE 9 FT LENGTH RUBBER TUBING AND
                    ONE BRASS TERMINAL TUBE
             -C     TYPE C CONNECTIONS
                    TWO 1/8 PIPE THREAD OPENINGS
             -D     TYPE D CONNECTIONS
                    TWO COMPRESSION FITTINGS FOR 1/.4 OD COPPER
                    OR ALUMINUM TUBING
             -E     TYPE E CONNECTIONS
                    TWO 3-WAY VENT VALVES 1/8 SPT TO 1/4 METAL TUBING
	     -AT    ALUMINUM TAG
             -NIST  NIST TRACEABLE CALIBRATION CERTIFICATE

FAQ

Questions

Question

Is routine maintenance required for a Dwyer red gage fluid type manometer?

Answer

Yes. The zero point should be checked periodically as well as the fluid level. After a year of service, particularly with dirty air, the fluid should be replaced to assure that specific gravity changes are not affecting the accuracy of the reading.

Related

Series 1227

Series Mark II

Series 1230/1235

Series 100

Series 250-AF

Series 420

Series 200 & 300

Series 1221/1222/1223

Series 100 AV

Series 400

Question

Will the water manometers freeze?

Answer

Yes, if the temperature drops below 32 degrees Fahrenheit, the fluid in the manometer will freeze. The fluid used in "W/M" style manometers is water-based with a small amount of fluorescent green fluid to enhance the meniscus. The other gage fluids have a lower freezing point, however, it is recommended that the manometers be stored above 32 degrees Fahrenheit.