Data Sheet

©Copyright 2020 Dwyer Instruments, Inc.
Printed in U.S.A. 5/20 DS-1950 Rev. 2
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DWYER INSTRUMENTS, INC.
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latest version of the relevant information to verify, before placing any orders, that the information being relied upon is current.
DIMENSIONS
WIRING DIAGRAM
HOW TO ORDER
SWITCH TYPE
1950: Pressure switch - inches w.c.
1950P: Pressure switch - PSID
RANGE
-02: 0.03 - 0.10 in w.c.
-00: 0.07 - 0.15 in w.c.
-0: 0.15 - 0.5 in w.c.
-1: 0.4 - 1.6 in w.c.
-5: 1.4 - 5.5 in w.c.
-10: 3.0 - 11.0 in w.c.
-20: 4.0 - 20.0 in w.c.
-2: 0.5 - 2.0 psid
-8: 1.5 - 8.0 psid
-15: 3.0 - 15.0 psid
-25: 4.0 - 25.0 psid
-50: 15.0 - 50.0 psid
MICRO SWITCH TYPE
-2: 10G mica silver contact*
-6: 10G phenolic gold contact
-M: 10C phenolic silver contact
OPTIONS
-AT: Aluminum tag
-PRESET: Preset
-ST: Stainless steel tag
DIAPHRAGM
MATERIAL
B: Buna-N
F: Flurosilicone*
N: Neoprene
S: Silicone
V: Fluroelastomer
*The 2F is standard
1950 -02 -2 S -AT
Use the bold characters from the chart below to construct a product code.
EXTERNAL
GROUND
[2] Ø17/64 [6.75] MOUNTING
HOLES EQUALL
Y SPACED ON
A 4-7/8 [123.83] B.C.
RANGE ADJUSTMENT SCREW
5-7/16
[138.13]
1/2 FEMALE NPT
ELECTRICAL CONNECTION
VENT DRAIN
PLUG
CAPTIVE SCREW
1/8 FEMALE NPT
LOW PRESSURE CONNECTION
1-15/32 [37.30]
3/8 [9.53]
27/32 [21.43]
27/32
[21.43]
3-1/2 [88.90]
1-23/32 [43.64]
3/8 [9.53]
1/8 FEMALE NPT HIGH
PRESSURE CONNECTION
NOTE: 1950-02: 7-3/4˝ (196.9) DIA.
X 4-11/32˝ (110.3) DEPTH. FOR
COMPLETE DIMENSIONS REQUEST
DRAWING 28-700175-00 FROM
OUR CUSTOMER SERVICE
DEPARTMENT