Specifications:
GAGE SPECIFICATIONS
Service: Air and non-combustible, compatible gases.
Wetted Materials: Consult Factory.
Accuracy: ±2% of full scale at 70°F (21.1°C). ±3% on -0 and ±4% on -00 models.
Pressure Limits: -20"
Hg. to 25 psig (-0.677 to 1.72 bar). MP option; 35 psig (2.41 bar), HP
option; 80 psig (5.52 bar). 36003S – 36010S; 150 psig (10.34 bar).
36020S and higher; 1.2 x full scale pressure.
Temperature Limits: 20 to 120°F. (-6.67 to 48.9°C) Low temperature option available.
Process Connections: 1/8" female NPT.
Size: 4" (101.6 mm) dial face, 5" (127 mm) O.D. x 8-1/4" (209.55 mm).
Weight: 4 lb (1.81 kg).
SWITCH SPECIFICATIONS
Switch Type: Each setpoint has 2 Form C relays (DPDT).
Repeatability: ±1% of full scale.
Electrical Rating: 10A @ 28 VDC, 10A @ 120, 240 VAC;
Electrical Connections: Screw terminals.
Power Requirements: 120 VAC, 50/60 Hz (standard); 240 VAC & 24 VAC Power optional.
Mounting Orientation: Diaphragm in vertical position. Consult factory for other position orientations.
Set Point Adjustment: Adjustable knobs on face.
Agency Approvals: UL,CSA, CE.
Options:
HIGH AND LOW LATCHING CIRCUITS
Dwyer Photohelic switch/gages can be wired for high-latching, low-latching or combination high-low latching
circuits. That is, the equipment will hold in these respective
positions once activated and until manually reset. This can be
particularly useful for alarm and signal applications where control is
accomplished by another Photohelic® switch/gage or other means. Complete
wiring and operational instructions are included. Where manual reset is
required a dry circuit push button such as Dwyer Part A-601 should be
used.
OPTIONS -- Consult Factory for Pricing
-SR Single contact, right set point, for actuation on increasing or decreasing pressure.
-OEM OEM Model, less
relay and transformer components and housing but including infared
diodes and phototransistor(s), light shutter and set pointer(s). For
single or double contact.
-RMR Remote-Mounted
Relay, relay pack may be mounted remotely from gage. Standard length is 5
ft. For other lengths, specify cable length required.
-TAMP Tamper-proof knobs, low temperature option, special scales, voltages and other features and modifications are available.
Special Housings available
include Weatherproof (NEMA 4) and Explosion-proof (NEMA 7 & 9; NEC
Cl I, Gr C&D; Cl II, Gr E, F&G; Cl III). Contact Gas Regulator Malaysia for detailed dimension drawings.
Special Purpose Ranges
Scale No. 3401 Square Root Specify Range
Scale No. 3402 Blank Scale Specify Range
ACCESSORIES - Photohelic gauge
A-298 Flat Flush Mounting Bracket
A-601 Manual Reset Switch
Features:
Check These Features
for Dependable Control
- Bezel and front cover
(with set point knobs and zero adjustment screw) removed to expose Photohelic®
set point mechanism.Cover is clear polycarbonate plastic.
- Gage pointer and
light shutter are mounted on helix and balancing counterweight.
Shutter passes through slot in optical limit switch to expose
phototransistors to integral infrared light source or mask them depending
on applied pressure
- Light shield
effectively protects phototransistors from strong outside light sources
yet allows free pointer movement. It also gives interior a clean
"finished" look.
- Optical limit
switches are used for reliability and long service life. Attached
directly to set pointers, they are individually aligned to assure precise
switching accuracy.
- Semi-Flexible drive
shaft connects to set point knobs.
- Zero adjustment screw
connects to screw in cover to adjust zero pressure reading.
- Plastic enclosure
protects electronic components and electrical connections.
- Polycarbonate
connection or terminal board is self-extinguishing (A3000 only).
- Glass epoxy printed
circuit boards for durability and permanence.
- Load relays
are DPDT with latching feature for maximum application versatility.
- Electronics
are designed to operate on 50/60 Hz, 120 volt current with 10% over or
under voltage. Special units for other voltages are available.
- Switch set pointers
show switch settings at all times.
- Spring loaded
friction clutch prevents operator damage of set point mechanism.
Series
A3000 Photohelic® Pressure Switch/Gage Model Number Chart
|
Inches
of w.c.
|
psi
|
Single
Pressure - psi
|
|
Model
Number
|
Range
- Inches w.c.
|
|
A3000-00
|
0-.25
|
|
A3000-0
|
0-.50
|
|
A3001
|
0-1.0
|
|
A3002
|
0-2.0
|
|
A3003
|
0-3.0
|
|
A3004
|
0-4.0
|
|
A3005
|
0-5.0
|
|
A3006
|
0-6.0
|
|
A3008
|
0-8.0
|
|
A3010
|
0-10
|
|
A3015
|
0-15
|
|
A3020
|
0-20
|
|
A3025
|
0-25
|
|
A3030
|
0-30
|
|
A3040
|
0-40
|
|
A3050
|
0-50
|
|
A3060
|
0-60
|
|
A3080
|
0-80
|
|
A3100
|
0-100
|
|
A3150
|
0-150
|
|
|
Model
Number
|
Range
- psi
|
|
A3201
|
0-1
|
|
A3202
|
0-2
|
|
A3203
|
0-3
|
|
A3204
|
0-4
|
|
A3205
|
0-5
|
|
A3210¹
|
0-10
|
|
A3215¹
|
0-15
|
|
A3220¹
|
0-20
|
|
A3230²
|
0-30
|
|
|
Model
Number
|
Range
- Inches w.c.
|
|
A36003S
|
0-30
|
|
A36006S
|
0-60
|
|
A36010S
|
0-100
|
|
A36020S
|
0-200
|
|
A36030S
|
0-300
|
|
A36060S
|
0-600
|
|
A36100S
|
0-1000
|
|
A36300S
|
0-3000
|
|
A36600S
|
0-6000
|
|
|
|
|
|
Inches
of w.c. - Zero Center
|
cm
of w.c.
|
|
Model
Number
|
Zero Center Range
|
|
A3300-0
|
.25-0-.25
|
|
A3301
|
.5-0-.5
|
|
A3302
|
1-0-1
|
|
A3304
|
2-0-2
|
|
A3310
|
5-0-5
|
|
A3320
|
10-0-10
|
|
A3330
|
15-0-15
|
|
|
Model
Number
|
Range
- cm w.c.
|
|
A3000-15CM
|
0-15
|
|
A3000-20CM
|
0-20
|
|
A3000-25CM
|
0-25
|
|
A3000-50CM
|
0-50
|
|
A3000-80CM
|
0-80
|
|
A3000-100CM
|
0-100
|
|
A3000-150CM
|
0-150
|
|
A3000-200CM
|
0-200
|
|
A3000-250CM
|
0-250
|
|
A3000-300CM
|
0-300
|
|
|
|
|
|
|
Inches
of w.c./Air Velocity, ft/min
|
mm
of w.c.
|
kPa
|
|
Model
Number
|
Range
- Inches w.c.
|
|
A3000-00AV³
|
0-.25
|
|
A3000-0AV³
|
0-.50
|
|
A3001AV³
|
0-1.0
|
|
A3002AV³
|
0-2.0
|
|
A3010AV³
|
0-10
|
|
|
Model
Number
|
Range
- mm w.c.
|
|
A3000-6MM
|
0-6
|
|
A3000-10MM
|
0-10
|
|
A3000-25MM
|
0-25
|
|
A3000-50MM
|
0-50
|
|
A3000-80MM
|
0-80
|
|
A3000-100MM
|
0-100
|
|
|
Model
Number
|
Range
- kPa
|
|
A3000-1KPA
|
0-1
|
|
A3000-1.5KPA
|
0-1.5
|
|
A3000-2KPA
|
0-2
|
|
A3000-3KPA
|
0-3
|
|
A3000-4KPA
|
0-4
|
|
A3000-5KPA
|
0-5
|
|
A3000-8KPA
|
0-8
|
|
A3000-10KPA
|
0-10
|
|
A3000-15KPA
|
0-15
|
|
A3000-20KPA
|
0-20
|
|
A3000-25KPA
|
0-25
|
|
A3000-30KPA
|
0-30
|
|
|
|
|
|
mm
of w.c. - Zero Center
|
cm
of w.c. - Zero Center
|
|
Model
Number
|
Zero CenterRange
|
|
A3300-20MM
|
10-0-10
|
|
A3300-30MM
|
15-0-15
|
|
|
Model
Number
|
Zero Center Range
|
|
A3300-4CM
|
2-0-2
|
|
A3300-10CM
|
5-0-5
|
|
A3300-30CM
|
15-0-15
|
|
|
|
|
|
Pascals
|
kPa
- Zero Center
|
Bi-Directional
|
|
Model
Number
|
Range
- Pascals
|
|
A3000-60PA
|
0-60
|
|
A3000-125PA
|
0-125
|
|
A3000-250PA
|
0-250
|
|
A3000-500PA
|
0-500
|
|
A3000-750PA
|
0-750
|
|
|
Model
Number
|
Zero Center Range
|
|
A3300-1KPA
|
.5-0-.5
|
|
A3300-3KPA
|
1.5-0-1.5
|
|
|
Model
Number
|
Range
- Inches w.c.
|
|
A3000-00N
|
-.05
to +20 (For Room Pressure Monitoring)
|
|
|
Pascals
- Zero Center
|
|
|
Model
Number
|
Zero Center Range
|
|
A3300-250PA
|
125-0-125
|
|
A3300-500PA
|
250-0-250
|
|
|
|
|
1MP | 2HP option standard | 3Pitot
tube required
Please contact Gas Regulator Malaysia
for enquiries on this Photohelic Pressure switch / Gauge for your
differential pressure switching needs. Series available A3000, 3000MR
and 3000MRS.
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Contact us for Dywer Instruments products in Malaysia.
