PHYSICAL DATA
Max. temperature: 180°F. For higher temperature media applications, a remote 
connection or siphon (pigtail) should be used.
Pressure connection: ¼" NPT. (½" on range 15S).
Housing: pressed steel with transparent cover.
Wiring connections: 3 screw type.
Wetted parts: same as Bourdon tube material.
Weight: 4 lb. (std); 6 Ib. (wea-proof); 8 Ib. (exp-proof).

STOCKED MODELS in bold 




Bourdon
Tube
Material
Adjustable
Operating
Range (PSIG)
MERCURY SWITCH - SPDT
4A @ 120V., 2A @ 240 V., 
AC/DC
SNAP ACTION SWITCH - SPDT
15A @ 120/240 VAC
SNAP ACTION SWITCH - SPDT
15A @ 120/240 
VAC

Minimum
Deadband PSIG
Model Number
Minimum
Deadband PSIG
Model Number
Fixed
Deadband PSIG
Model Number

Brass
0-30" Hg. 
Vac.
1/8-15
1/8-20
1-35
2-60
5-100
5-150
10-200
10-300 

2" Hg. Vac
1
1
1.75
3
3.75
6
8
14 
DA-31-153-2*
DA-31-153-1
DA-31-153-3A
DA-31-153-4
DA-31-153-5
DA-31-153-6
DA-31-153-7
DA-31-153-8
DA-31-153-9 

9" Hg. Vac
4
4
5
6
9
16
16
25 
DA-7031-153-2*
DA-7031-153-1
DA-7031-153-3A
DA-7031-153-4
DA-7031-153-5
DA-7031-153-6
DA-7031-153-7
DA-7031-153-8
DA-7031-153-9 

3" Hg. Vac
1.5
1.5
1.5
2
2.5
3
4
5 
DS-7231-153-2*
DS-7231-153-1
DS-7231-153-3A
DS-7231-153-4
DS-7231-153-5
DS-7231-153-6
DS-7231-153-7
DS-7231-153-8
DS-7231-153-9 


403SS
2-60
5-100
10-200
10-300
25-600
100-1500
500-5000 

4
6
8
14
25
90
450 
DA-21-153-5S
DA-21-153-6S
DA-21-153-8S
DA-21-153-9S
DA-21-153-10S
DA-21-153-12S
DA-21-153-15S* 

9
13
15
19
45
130
900 
DA-7021-153-5S
DA-7021-153-6S
DA-7021-153-8S
DA-7021-153-9S
DA-7021-153-10S
DA-7021-153-12S
DA-7021-153-15S* 

3
3.5
4
6
10
30
200

DS-7221-153-5S
DS-7221-153-6S
DS-7221-153-8S
DS-7221-153-9S
DS-7221-153-10S
DS-7221-153-12S
DS-7221-153-15S* 


316SS
10-150
10-300 
6
18 
DA-41-153-24E
DA-41-153-9E 
11
28 
DA-7041-153-24E
DA-7041-153-9E 
4
8 
DS-7241-153-24E
DS-7241-153-9E 

- Additional features available on special order, 
include other electrical ratings and circuits, lower minimum differentials, 
special housings, diaphragm seals, and manual reset. For severe vibration, a 
special Delrin Bushed Movement is available.

*Range 2 and 15S not FM 
approved. Other ranges FM approved. For FM approved models specify DAF or DSF. 
Example DAF-31-153-1 
High Current Capacity1 or Extra Low 
Deadband Mercury Switch (SPDT)1 




Bourdon
Tube
Material
Adjustable
Operating
Range (PSIG)
MERCURY SWITCH - SPST - HIGH CURRENT
10A @ 120V., 5A 
@ 240V., AC/CD
MERCURY SWITCH - SPST - LOW DEADBAND
5A @ 120VAC., 2A 
@ 240VAC., 2.5A @ 120VDC

Minimum
Deadband PSIG
OPEN on Inc.
Model Number
CLOSE on Inc.
Model Number
Minimum
Deadband PSIG
OPEN on Inc.
Model Number
CLOSE on Inc.
Model Number

Brass
0-30" Hg. 
Vac.
1/8-15
1/8-20
1-35
2-60
5-100
5-150
10-200
10-300 

2" Hg. Vac
1
1
1.75
3
3.75
6
8
14 
DA-31-2-2*
DA-31-2-1
DA-31-2-3A
DA-31-2-4
DA-31-2-5
DA-31-2-6
DA-31-2-7
DA-31-2-8
DA-31-2-9 

DA-31-3-2*
DA-31-3-1
DA-31-3-3A
DA-31-3-4
DA-31-3-5
DA-31-3-6
DA-31-3-7
DA-31-3-8
DA-31-3-9 

1" Hg. Vac.
0.5
0.5
0.75
1.0
2.0
3.0
3.5
6.0 

DA-531-2-2*
DA-531-2-1
DA-531-2-3A
DA-531-2-4
DA-531-2-5
DA-531-2-6
DA-531-2-7
DA-531-2-8
DA-531-2-9 

DA-531-3-2*
DA-531-3-1
DA-531-3-3A
DA-531-3-4
DA-531-3-5
DA-531-3-6
DA-531-3-7
DA-531-3-8
DA-531-3-9 


403SS
2-60
5-100
10-200
10-300
25-600
100-1500
500-5000 

4
6
8
14
25
90
450 
DA-21-2-5S
DA-21-2-6S
DA-21-2-8S
DA-21-2-9S
DA-21-2-10S
DA-21-2-12S
DA-21-2-15S* 

DA-21-3-5S
DA-21-3-6S
DA-21-3-8S
DA-21-3-9S
DA-21-3-10S
DA-21-3-12S
DA-21-3-15S* 

2.5
3.0
4.0
7
15
50
200 
DA-521-2-5S
DA-521-2-6S
DA-521-2-8S
DA-521-2-9S
DA-521-2-10S
DA-521-2-12S
DA-521-2-15S* 

DA-521-3-5S
DA-521-3-6S
DA-521-3-8S
DA-521-3-9S
DA-521-3-10S
DA-521-3-12S
DA-521-3-15S* 


316SS
10-150
10-300 
6
18 
DA-41-2-24E
DA-41-2-9E 
DA-41-3-24E
DA-41-3-9E 
3.0
5.0 
DA-541-2-24E
DA-541-2-9E 
DA-541-3-24E
DA-541-3-9E 

1Also available in Weather-proof 
(DAW-33) or Explosion-proof (DAH-31) Housings

*Range 2 and 15S not FM 
approved. Other ranges FM approved. For FM approved models specify DAF or DSF. 
Example DAF-31-2-1 
Weather-proof Models 




Bourdon
Tube
Material
Adjustable
Operating
Range (PSIG)
MERCURY SWITCH - SPDT
4A @ 120V., 2A @ 240 V., 
AC/DC
SNAP ACTION SWITCH - SPDT
15A @ 120/240 VAC
SNAP ACTION SWITCH - SPDT
15A @ 120/240 
VAC

Minimum
Deadband PSIG
Model Number
Minimum
Deadband PSIG
Model Number
Fixed
Deadband PSIG
Model Number

Brass
0-30" Hg. 
Vac.
1/8-15
1/8-20
1-35
2-60
5-100
5-150
10-200
10-300 

2" Hg. Vac
1
1
1.75
3
3.75
6
8
14 
DAW-33-153-2*
DAW-33-153-1
DAW-33-153-3A
DAW-33-153-4
DAW-33-153-5
DAW-33-153-6
DAW-33-153-7
DAW-33-153-8
DAW-33-153-9 

9" Hg. Vac
4
4
5
6
9
16
16
25 
DAW-7033-153-2*
DAW-7033-153-1
DAW-7033-153-3A
DAW-7033-153-4
DAW-7033-153-5
DAW-7033-153-6
DAW-7033-153-7
DAW-7033-153-8
DAW-7033-153-9 

3" Hg. Vac
1.5
1.5
1.5
2
2.5
3
4
5 
DSW-7233-153-2*
DSW-7233-153-1
DSW-7233-153-3A
DSW-7233-153-4
DSW-7233-153-5
DSW-7233-153-6
DSW-7233-153-7
DSW-7233-153-8
DSW-7233-153-9 


403SS
2-60
5-100
10-200
10-300
25-600
100-1500
500-5000 

4
6
8
14
25
90
450 
DAW-23-153-5S
DAW-23-153-6S
DAW-23-153-8S
DAW-23-153-9S
DAW-23-153-10S
DAW-23-153-12S
DAW-23-153-15S* 

9
13
15
19
45
130
900 
DAW-7023-153-5S
DAW-7023-153-6S
DAW-7023-153-8S
DAW-7023-153-9S
DAW-7023-153-10S
DAW-7023-153-12S
DAW-7023-153-15S* 

3
3.5
4
6
10
30
200

DSW-7223-153-5S
DSW-7223-153-6S
DSW-7223-153-8S
DSW-7223-153-9S
DSW-7223-153-10S
DSW-7223-153-12S
DSW-7223-153-15S* 


316SS
10-150
10-300 
6
18 
DAW-43-153-24E
DAW-43-153-9E 
11
28 
DAW-7043-153-24E
DAW-7043-153-9E 
4
8 
DSW-7243-153-24E
DSW-7243-153-9E 

*Range 2 and 15S not FM approved. All other DAW 
ranges are FM approved. 
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