How it Works
EXPLOSION-PROOF DP
12
www
.oranger
esear
ch.com
1204PGS
1514DGS
1504DS
11" max
(13” 1804)
5.0" wide
Enclosure 3.6" deep
(3.9” 1804)
4.5” dial shown
Dimensions
0-5” H
2
O to 0-300 psid
Piston or Diaphragm
Sensors with Explosion-
Proof Enclosures
for Switches, Relays
or Transmitters
• Class 1, Div. 1 rated enclosures
• Rugged, weatherpoof design
• Gauge, switch and transmitter
versions
Our Class 1, Div. 2 enclosures found throughout this
catalog are popular for hazardous environments where
explosive gases or vapors
may be present. Our Class 1,
Div. 1 Explosion-proof line, expands on that protection.
The heavy-duty enclosures are designed to seal the
electronics from environments where flammable gases or
vapors often exist and to contain any potential explosions.
This explosion-proof line incorporates the same piston or
diaphragm sensors and pressure bodies found in the
preceding pages. We add an additional extension pin with
a secondary magnet to trigger our reed switches or to
control transmitter output. The secondary magnet and
electronics are located in a sealed explosion-proof box
adjacent to the pressure body.
The switches and electrical connections are housed in
special UL, CSA, FM and ATEX approved enclosures. The
cast aluminum housings have two mounting lugs, two
3/4” NPT electrical conduit ports, and meet the following
specifications: Class 1, Gr. B, C, & D; Class 2, Gr. E, F, & G;
and Class 3. They also meet NEMA 3, 4X, 7, 9, & 12
specifications.
Select from a variety of options such as follower pointers,
red arcs and mounting brackets along with switch, relay
or transmitter outputs. More details on these models can
be found on our DP introduction pages 2-5. Electrical
details are on pages 26-27.
Features
D
e
t
a
i
le
d d
r
awings
on website.
1204PGS, 1504DGS,
1514DGS, 1804DGS
0
5
10
15
20
UPPER
PRESSURE
BODY
LOW PRESS. PORT
POINTER MAGNET
& POINTER ASSY.
HIGH PRESS. PORT
PRESSURE
EXTENSION
TUBE
SECONDARY
MAGNET
SWITCH
ENCLOSURE
*SWITCH
ADJUSTMENT
DIAPHRAGM
SENSING ELEMENT
PRIMARY
MAGNET
ASSEMBLY
*REED
SWITCH
GAUGE FACE
RANGE SPRING
END CAP
3
4
1
2
TWO 3/4”
CONDUIT PORTS
Variations between the low pressure and high
pressure ports create an imbalance causing the
piston or diaphragm sensor
1 to move in
pr
opor
t
ion to the change. A primary magnet
2 is
attached to the pressure sensor and also moves
w
it
h it in proportion to the differential in pressure.
The motion of the primary magnet is tracked by
a rotary magnet
3 located in a separate body
ca
v
ity
.
T
he r
otary magnet moves a pointer on a dial
indicating differential pressure. Process fluids are
isolated from the dial case and switch enclosure.
A secondary follower magnet
4 located in a
pr
e
ssure extension tube also moves with the
pressure sensor. Reed switches, mounted
e
xternally on the pressure extension tube, are
activated when the field of the secondary magnet
interacts with the switch elements at a preset point
cl
osi
ng or ope
n
i
ng the contacts.
DIFFERENTIAL PRESSURE
13
Toll-Free 1-800-989-5657
Specifications (Detailed Specification Sheets on Website)
Model Differential Maximum Accuracy Porting Electrical
pressure line pressure/temperature (F.S.)
(Many porting Available
range
(Ascending) types available)
1204PGS/PS/PGT/PT 0-5 to 0-150 psid 5000 psig (340 bar)/200ºF (93ºC) 2%
1
/4” NPT 1 or 2 switches
(0-0.33 to 0-10 bar) 1 or 2 relays
transmitter
Class 1 Div. 1
150 4DGS/DS/DGT/DT 0-5 to 0-300 psid 3000 psig (100 bar)/200ºF (93ºC) 2%
1
/4” NPT 1 or 2 switches
(0-0.33 to 0-20 bar) 1 or 2 relays
transmitter
Class 1 Div. 1
1514DGS/DS/DGT/DT 0-1 to 0-50 psid 1500 psig (100 bar)/200ºF (93ºC) 2%
1
/4” NPT 1 or 2 switches
(0-0.07 to 0-3.3 bar) 1 or 2 relays
transmitter
Class 1 Div. 1
1804DGS/DS/DGT/DT 0-5” H
2
O to 0-8 psid Aluminum body 2%
1
/4” NPT 1 or 2 switches
(0-125 mm H
2
O to 100 psig (7 bar)/200ºF (93ºC) 1 or 2 relays
0-0.5 bar) Stainless steel body transmitter
150 psig (10 bar)/200ºF (93ºC) Class 1 Div. 1
How to Order
Select from each of the applicable categories to construct a model number. Use the model number when
ordering or obtaining additional information and pricing from Orange Research or your local distributor.
Reordering? You must supply the Part Number from your instrument label.
Sample Model Number
1204PGS – 1A – 3.5B – A 0-5 psid, 1,3,E
M
odel
1204PGS
1204PS
1504DGS
1504DS
1514DGS
1514DS
1804DGS
1804DS
More models
above
P
ressure B
ody
In-line por
ts:
1A = alumin
um
1C = 316 stainless steel
1804 SS onl
y
D
ia
l Case
3.5B = 3.5”
basic
4.5B = 4.5”
basic
6B = 6.0” basic
Chang
e
“B”
to
“F”
above for flanged
dial case
E
lectri
cal
A = SPST
, N.O
.
B = SPST
, N.C
.
C = SPDT
A-A = 2 ea. - A
B-B = 2 ea.
- B
C-C = 2 ea. - C
R1A = 1 relay
R2D = 2 relays
T2 = transmitter
Ran
ge
Model 1204:
0-5, 0-8, 0-10, 0-15,
0-20, 0-25, 0-30, 0-35,
0-40, 0-50, 0-60, 0-80,
0-100, 0-125, 0-150 psid
Model 1504:
In addition to above
0-200, 0-250. 0-300 psid
Model 1514:
0-1, 0-2, 0-3, 0-5, 0-8,
0-10, 0-15, 0-20, 0-25,
0-30,0-35,0-40,0-50 psid
Model 1804:
0-5
"
, 0-10
", 0-15", 0-20",
0-25", 0-30", 0-40", 0-50",
0-60", 0-80", 0-100", 0-150",
0-200" H
2
O; 0-8 psid
O
p
tions (more on pg. 5)
1 =
1
/2” NPT
2 = plastic lens
3 = liquid filled (glycerine)
4 = follower pointer
5 =
T
eflon coated magnet/spr
ing
6 = red arc (specify range)
7 = dual scale (specify both)
8 = high temperature
Special Diaphragm & Seals
(Buna-N standard)
Model 1204 (o-r
ing seals only):
E = EPDM V = Viton
F = Fluorosilicone T = Teflon
Models 1504,
1514 & 1804:
E = EPDM V = Viton
F = Fluorosilicone
1204PGS
—
——
,
1A 3.5B A 0-5 psid 1,3,E
P=Piston D=Diaphragm G=Gauge S=Switch T=Transmitter
5.50
[139.7]
1 3/4"
"B"-STYLE
DIAL CASE
C
L
PORT
GRND.
SCREW
SWITCH
ADJUSTMENT
SCREWS
1/4" DIA MNTG. HOLES
M6 x 1 BOLTS SUGGESTED
SWITCH COVER REMOVED
"B"-STYLE
DIAL CASE SIZES & DIMENSIONS
3.5"
4.5"
A
6.0"
B
C
D
4.25[108.0]
3.94[100.1]
*.094[23.9]
.13[3.3]
6.68[169.7]
6.44[163.6]
1.00[25.4]
.13[3.3]
E
.72[18.3]
.13[3.3]
.28[7.1]
4.94[125.5]
5.25[133.4]
.72[18.3]
.75[19.1]
*
C
L
OF GA. FALLS BELOW
C
L
OF PORT
"B"
"A"
"D"
"E"
3 7/8"
1.25
[31.8]
1.56
[39.6]
8.04
[204.2]
"C"
C
L
GA.
C
L
PORT
3/4" NPT
CONDUIT PORT
MODEL 1204PGS (1/4" NPT)
SHT. 1 of 2 REV. -
DIAL CASE STYLES
"F"
5.50
[139.7]
1 3/4"
"F"-STYLE
DIAL CASE
C
L
PORT
"F"-STYLE
DIAL CASE SIZES & DIMENSIONS
3.5"
4.5"
A
6.0"
B
C
D
5.00[127.0]
3.94[100.1]
*.094[2.9]
.13[3.3]
7.62[193.5]
6.44[163.6]
1.00[25.4]
.13[3.3]
E
.72[18.3]
.13[3.3]
.28[7.1]
4.94[125.5]
6.00[152.4]
.72[18.3]
.75[19.1]
PANEL CUTOUT:
4.00
3 MTG. HOLES
.187 EQUALLY
SPACED ON A
4.56 B.C.
PANEL CUTOUT:
5.00
3 MTG. HOLES
.218 EQUALLY
SPACED ON A
5.38 B.C.
PANEL CUTOUT:
6.50
3 MTG. HOLES
.218 EQUALLY
SPACED ON A
7.00 B.C.
F
*
C
L
OF GA. FALLS BELOW
C
L
OF PORT
"D"
"E"
"B"
"A"
1.25
[31.8]
1.56
[39.6]
8.04
[204.2]
3 7/8"
"C"
C
L
GA.
C
L
PORT
1.75
[44.4]
.09
[2.3]
.75
[19.1]
-4 PORTING
LO PRESS
PORT
-4 PORTING
HI PRESS
PORT
C
L
GA.
ADAPTOR MOUNTING PLATE
FOR -18,-15 & -9 BOXES
AVAILABLE
C
L
PORT
.63
[16.0]
1.75
[44.4]
-1 PORTING
LO PRESS
PORT
-1 PORTING
HI PRESS
PORT
3/4" NPT
CONDUIT PORT
3/4" NPT
CONDUIT PORT
SHT. 2 of 2 REV. -
MODEL 1204PGS DIAL CASE DIMENSIONS
PORTING LOCATIONS
5.50
(139.7)
1 3/4"
"B"-STYLE GAUGE CASE
C
L
PORT
GROUND
SCREW
SWITCH
ADJUSTMENT
SCREWS
1/4" DIA MNTG. HOLES
M6 x 1" BOLTS SUGGESTED
SWITCH COVER REMOVED
"D"
"E"
"B""A"
3 7/8"
7.74
(196.3)
1.00
(25.4)
2.00
(50.8)
2.31
(58.7)
2.07
(52.6)
"C"
C
L
GA.
C
L
PORT
3/4" NPT
CONDUIT PORT
*
C
L
OF GAUGE FALLS ABOVE
C
L
OF PORT
MODEL 1504DGS-1 (1/4" NPT)
SCALE: 3/8"=1
SHT. 1 of 2 REV. A
ALL DIMENSIONS IN INCHES
UNLESS OTHERWISE SPECIFIED
5.50
(139.7)
"F"
1 3/4"
C
L
PORT
"F"-STYLE GAUGE GASE
7.74
(196.3)
2.07
(52.6)
"B""A"
1.00
(25.4)
2.00
(50.4)
2.31
(58.7)
"D"
"E"
3 7/8"
"C"
C
L
GA
C
L
PORT
3/4" NPT
CONDUIT PORT
*
C
L
OF GAUGE FALLS ABOVE
C
L
OF PORT
MODEL 1504DGS-1 (1/4" NPT)
SCALE: 3/8"=1
SHT. 2 of 2 REV. A
ALL DIMENSIONS IN INCHES
UNLESS OTHERWISE SPECIFIED
5.50
(139.7)
1 3/4"
"B"-STYLE GAUGE CASE
C
L
PORT
SWITCH
ADJUSTMENT
SCREWS
GRND.
SCREW
1/4" DIA. MNTG. HOLES
M6 x 1" BOLTS SUGGESTED
SWITCH COVER REMOVED
2.00
(50.8)
2.31
(58.7)
"D"
"E"
"B""A"
7.97
(202.4)
2.34
(59.4)
3 7/8"
1.00
(25.4)
"C"
C
L
GA.
C
L
PORT
3/4" NPT
CONDUIT PORT
*
C
L
OF GAUGE CASE IS ABOVE
C
L
OF PORT
MODEL 1514DGS-1 (1/4" NPT)
SCALE: 3/8"=1
SHT. 1 of 2 REV. A
ALL DIMENSIONS IN INCHES
UNLESS OTHERWISE SPECIFIED
5.50
(139.7)
"F"
1 3/4"
"F"-STYLE GAUGE CASE
C
L
PORT
1/4" DIA. MNTG. HOLES
M6 x 1" BOLTS SUGGESTED
2.00
(50.8)
2.31
(58.7)
7.97
[202.4]
"E"
"B""A"
1.00
(25.4)
2.34
(59.4)
"D"
"C"
C
L
GA.
C
L
PORT
3/4" NPT
CONDUIT PORT
*
C
L
OF GAUGE CASE IS ABOVE
C
L
OF PORT
MODEL 1514DGS-1 (1/4" NPT)
SCALE: 3/8"=1
SHT. 1 of 2 REV. A
ALL DIMENSIONS IN INCHES
UNLESS OTHERWISE SPECIFIED
