Mercoid DA Series Pressure Switches

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DA/DS/DR Series Pressure Switches

Pressure, Vacuum and Compound Ranges available up to 8000 PSIG

Minimum deadband is obtainable at any point in the range

UL and CSA listed - many models are FM listed

Available housings include Weather Proof and Explosion Proof

Customers tell us that this is the best pressure switch made. Our most popular, Model DA combines extremely high sensitivity and repeatability with easily adjustable set and reset points through non-interactive external adjustments. Visible calibrated dial for set points and on/off indicator to indicate switch actuation are included. Choose either high current snap switch or hermetically sealed contact mercury switch for lifetime reliability. The DS series features a low fixed deadband. The model DR features a manual reset, which can be active on rise or fall.

Specifications

Maximum Temperature

180°F. For higher temperature media applications, a remote connection or syphon should be used.

Pressure Connection

1/4" MNPT (1/2" MNPT on 15S range)

Housing

Pressure Steel with transparent cover (standard DA/DS/DR)

Wiring Connections

3 screw type

Maximum Pressure

Maximum adjustment range

Electrical

Mercury Switches

Code

Circuit Suffix

AC Capacity

DC Resistive

Horsepower

A
B
C
H
I (See note 2)

-2, -3
-153, -804
-2, -3
-2, -3
-2, -3

120V	240V	440V
10A 4A See note 6 5A 0.3A	5A 2A See note 6 2A 0.15A	3A See note1 See note 6 NA NA

120V	240V
10A 4A 10A 2.5A 0.15A	5A 2A 5A 1A 0.07A

AC	DC
3/4 1/8 3/4 1/8 NA	1/3 NA 1/3 1/10 NA

Snap Action Switches

Code

Circuit Suffix

AC Capacity

DC Resistive

Horsepower

D
E
F
G

-153
-153
-804
-804

120V	240V	440V
15A 15A 12A 5A	15A 15A 10A 5A	15A@480V NA 5A NA

120V	240V
1/2A See note 4 1/2A See note 5	1/4A See note 4 1/4A See note 5

AC	DC
1/8 NA	NA NA NA NA

Notes:
1: -153 circuit available 1A 440VAC on special order
2: Also rated 0.9 Amps at 24 VAC
3: 1/4 HP @ 120 VAC; 1/2 HP @ 240 VAC
4: DC Rated Controls (up to 10 Amps) available on special order
5: 5A, 30 VDC resistive
6: 17A non-inductive at 120/240/440 VAC

**DA/DS/DR Series Housings**
Case Dimensions	General Purpose NEMA 1 Enclosure For infoor use and other general purpose applications under normal atmospheric conditions. Providess protection against dust and light splashing. Heavy gauge plain steel case. Flanged ase available. Transparent cover for visible on-off operation. Locking device prevents tampering. Bottom or back pressure connection, 1/4" NPT (1/2" NPT on 15S range). Electrical connection back of case for 1/2" conduit or BX. Shipping weight 4 lbs (2 kg.). Furnished as standard, unless otherwise specified. This enclosure is also suitable for Class I, Division 2 applications with the addition of a conduit hub (mercury switch models only).
Case Dimensions	Water Tight, Dust Tight - NEMA 3S, 4, & 4X Enclosure For outdoor or indoor applications. Complies with hose test and requirements for water tight, dust tight, drip tight weatherproof, weather resistant, splash proof, sleet proof and moisture resistant. Flanged, heavy gauge steel case with transparent cover for visible on-off operation. External adjustments protected by cover. Bottom pressure connection only. Electrical connection back of case for 1/2" conduit, removable 1/2" hub. Shipping weight 6 lbs (3 kg.).
Case Dimensions	Explosion Proof - NEMA 7 and 9 Enclosure Hazardous area enclosure suitable for Class I, Groups C & D, Class II, Groups E, F & G; NEMA 7 and 9 applications. Control mechanism is an integral part of the enclosure and cannot be replaced in the field. For surface, panel or pipe mounting. Aluminum case with glass window in cover for visible on-off operation. Bottom pressure connection. External adjustments. Available with breather and drain. Shipping weight 8 lbx (3.6 kg.). Not available on D80 series.

Part Numbers

Example		DA			70	2	1	153		7	DA-7021-153-7
Reset Options		DA DR DR DS (note 3) DL (notes 1,3)							U L		Automatic Reset, Adjustable Deadband Manual Reset, Fixed Deadband, Operates on decrease automatically Manual Reset, Fixed Deadband, Operatures on increase automatically Automatic Reset, Fixed deadband Manual lock reset, fixed deadband, available on special order only
Housing & Approval Options	N3	See Note 7	W W H E	F							Weather proof enclosure, Nema 3S, 4 and 4X. Flanged back standard Weather resistant, includes drain. Flanged back standard. Available as special order only. Explosion proof enclosure - control integral. Available only on DA, DR, DS Explosion proof enclosure - control removeable. Availe only on DA, DR, DS Factory Mutual Approval. DAW is FM approved as standard.
Circuit Switching Options		See notes 2 & 8 See notes 2 & 8 See notes 2 & 8 See notes 2 & 8 See note 12			2 2 4 4 4 4 5 5 70 70 72 72			2 3 153 156 804 2 3 4122 4129 4132 4123 2 3 153 804 153 804 B			SPST opens on pressure increase. Elect. Code A, Mercury Switch SPST closes on pressure increase. Elect. Code A, Mercury Switch SPDT, Electrical Code B, Mercury Switch 2 each SPST, one opens as the other closes. Elect. Code A, Mercury Switch 2 each SPDT, Elect. Code B, Mercury Switch; Elect. Code G, Snap Switch SPST, opens on increase, Elect. Code I, DS only, Mercury Switch SPST, closes on increase, Elect. Code I, DS only Mercury Switch Two Stage Control, includes 2 each SPST Mercury Switch Two Stage Control, includes 2 each SPST Mercury Switch Two Stage Control, includes 2 each SPST Mercury Switch Two Stage Control, includes 2 each SPST Mercury Switch SPST, opens on increase, Elect. Code H, Mercury Switch SPST, closes on increase, Elect. Code H, Mercury Switch SPDT, Elect. Code D, Snap Switch 2 each SPDT, Elect Code F, for ranges above 35 PSI only, 702x, 703x, 704x only DS only SPDT Snap Switch, Elect code E 2 each SPDT snap switches, Elect code G, DS only Delrin Bushed Movement. For all controls
Ranges and Bourdon Tube Materials		See Note 6 See Note 6 See Note 6				2 2 2 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3 3 3 3 3 3 4 4 4 4 4 4 4 4 4 8 8 8				25S 26S 5S 6S 8S 9S 9AS 10S 11S 12S 13S 15S 16S 2 3 1 3A 4 27 5 6 7 8 9 26E 23E 6E 24E 9E 21E 22E 11E 13E 23K 24K 9K	30"Hg Vacuum - 60 PSIG, Type 403SS Bourdon Tube 30"Hg Vacuum - 75 PSIG, Type 403SS Bourdon Tube 2-60 PSIG, Type 403SS Bourdon Tube 5-100 PSIG, Type 403SS Bourdon Tube 10-200 PSIG, Type 403SS Bourdon Tube 10-300 PSIG, Type 403SS Bourdon Tube 40-350 PSIG, Type 403SS Bourdon Tube 25-600 PSIG, Type 403SS Bourdon Tube 50-1000 PSIG, Type 403SS Bourdon Tube 100-1500 PSIG, Type 403SS Bourdon Tube 300-2500 PSIG, Type 403SS Bourdon Tube 500-5000 PSIG, Type 403SS Bourdon Tube 800-8000 PSIG, Type 403SS Bourdon Tube 0-30"Hg Vacuum, Brass Bourdon Tube 10"Hg - 2 PSIG, Brass Bourdon Tube 1/8-15 PSIG, Brass Bourdon Tube 1/8-20 PSIG, Brass Bourdon Tube 1-35 PSIG, Brass Bourdon Tube 25"Hg - 50 PSIG, Brass Bourdon Tube 2-60 PSIG, Brass Bourdon Tube 5-100 PSIG, Brass Bourdon Tube 5-150 PSIG, Brass Bourdon Tube 10-200 PSIG, Brass Bourdon Tube 10-300 PSIG, Brass Bourdon Tube 30"Hg - 75 PSI, 316SS Bourdon Tube 5-75 PSIG, 316SS Bourdon Tube 10-100 PSIG, 316SS Bourdon Tube 10-150 PSIG, 316SS Bourdon Tube 10-300 PSIG, 316SS Bourdon Tube 30-400 PSIG, 316SS Bourdon Tube 75-800 PSIG, 316SS Bourdon Tube 100-1000 PSIG, 316SS Bourdon Tube 200-2500 PSIG, 316SS Bourdon Tube 5-75 PSIG, 316SS Bourdon Tube, Carbon Steel Bottom, F Housing Standard 10-150 PSIG, 316SS Bourdon Tube, Carbon Steel Bottom, F Housing Standard 10-300 PSIG, 316SS Bourdon Tube, Carbon Steel Bottom, F Housing Standard
Connection and Mounting Options							1 2 3 4				Standard Housing Back Connection. Not available for ranges 15S & 16S Flanged Back (Standard on W models) Back Connection and Flanged Back. Not Available for ranges 15S & 16S

Notes for above table:

`Note 1:`	`Not available on D_ _ - _5, 74 or 95`
`Note 2:`	`Available on DA only`
`Note 3:`	`Not available on D_ _ _ - 70_ _`
`Note 6:`	`Available also as _ _28, 58, 708 and 728. Not available with E or H housing or 70-804 circuit.`
`Note 7:`	`F available only as DAF, DSF, DRF, DAHF, DRHF, DSHF; not all ranges or circuits.`
`Note 8:`	`Switch rating for D-400:` `AC, 120V @ 0.3A; 240V @ 0.15A; 24V @ 0.8A` `DC, 120V @ 0.15A; 240V @ 0.07A` `Not available for 440V Service`
`Note 12:`	`Available only on 702, 703 and 704`

Approximate Minimum Deadbands

Single Stage Controls - Deadbands apply to -2, -3 and -153 circuits only
Deadbands may increase for other circuits or multiple circuits.
Deadband Chart

Contact Us!

Sherman Instruments
John Sherman Agencies Ltd.
1641 Venables Street
Vancouver, British Columbia, Canada
V5L 2H1

Phone: 604-254-9622
Fax: 604-254-3123

e-mail: info@johnsherman.com
www.johnsherman.com