Manual

DWYER INSTRUMENTS, INC. Phone: [phone] www.dwyer-inst.com
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A. Fax: [phone] e-mail: [e-mail]
Low Differential Pressure Switches
for General Industrial Service
Specifications — Installation and Operating Instructions
Bulletin E-53
3-39/64
[91.68]
Ø7/8 [22.23]
CONDUIT
CONNECTION
3-1/8
[79.38]
Ø4
[101.60]
1-27/32
[46.83]
1-1/8
[28.57]
1/8 FEMALE NPT
HIGH PRESSURE
CONNECTION
1/2 MALE NPT
MOUNTING SPUD
1/8 FEMALE NPT
LOW PRESSURE
CONNECTION
3-27/32
[97.63]
2-3/32
[53.18]
2-1/8
[53.98]
CLEARANCE FOR
COVER REMOVAL
3/4
[19.05]
One of our most popular pressure switches. Combines small
size and low price with 2% repeatability for enough accuracy for
all but the most demanding applications. Set point adjustment
inside the mounting switch on one side of a wall or panel with
adjustment easily accessible on the opposite side.
*Model 1823 shown; (1823 replaces 1820, 1821 and 1822
which are similar).
Environmental (MIL) Switch
Unlisted Model 1820 can be furnished with special snap switch
sealed against the environment for high humidity and/or for
government applications. Similar to standard Model 1823
except dead band is slightly greater. Specify Model 1820
(Range No.) "MIL" in ordering.
Model 1823 pressure switch. UL
and CSA Listed, FM and
CENELEC approved.
Series 1823 pressure switch.
Conduit enclosure removed to
show electric switch.
Construction and dimensions. Series 1823 pressure switches.
Series
1800
SERIES 1823 SWITCHES —
OPERATING RANGES & DEADBANDS
SPECIFICATIONS
Service: Air and non-combustible, compatible gases.
Wetted Materials: Consult Factory.
Temperature Limits: -30 to 180°F (-34 to 82.2°C). 1823-00,
-20 to 180°F (-28.9 to 82.2°C).
Pressure Limits: 10 psig (68.95 kPa) continuous, 25 psig
(172.4 kPa) surge.
Switch Type: Single-pole double-throw (SPDT).
Repeatability: ±2%.
Electrical Rating: 15 A @ 120-480 VAC, 60 Hz. Resistive 1/8
HP @125 VAC, 1/4 HP @ 250 VAC, 60 Hz. De-rate to 10 A for
operation at high cycle rates.
Electrical Connections: 3 screw type, common, normally
open and normally closed.
Process Connections: 1/8˝ female NPT.
Mounting Orientation: Diaphragm in vertical position. Consult
factory for other position orientations.
Set Point Adjustment: Screw type inside mounting spud.
Weight: 1 lb, 5 oz (595 g).
Agency Approvals: CE, UL, CSA, FM.
Model
Number
Operating
Range,
Inches W.C.
Approximate
Dead Band
At Min.
Set Point
At Max.
Set Point
1823-00
1823-0
1823-1
1823-2
1823-5
1823-10
1823-20
1823-40
1823-80
0.05
0.06
0.08
0.10
0.14
0.18
0.35
0.56
1.30
0.05
0.06
0.08
0.12
0.28
0.45
0.70
1.10
3.0
0.07 to 0.22
0.15 to 0.5
0.3 to 1.0
0.5 to 2.0
1.5 to 5.0
2.0 to10
3 to 22
5 to 44
9 to 85
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