Specifications
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16
Pressure
Using solid state technology, the Series 3000MR and
3000MRS Photohelic
®
switch/gages
combine the functions of a
precise, highly repeatable differential pressure switch with a large
easy-to-read analog pressure gage employing the durable, time-proven
Magnehelic
®
gage design. Switch setting is easy to adjust with large
external knobs on the gage face. Gage reading is unaffected by switch
operation — will indicate accurately even if power is interrupted. Solid
state design now results in greatly reduced size and weight. Units can
be flush mounted in 4-13/16˝ (122 mm) hole or surface mounted with
hardware supplied. 3000MR models employ versatile electromechani-
cal relays with gold over silver contacts — ideal for dry circuits. For
applications requiring high cycle rates, choose 3000MRS models with
SPST (N.O.) solid state relays. All models provide both low and high
limit control and include 18-inch (45 cm) cable assemblies for electrical
connections.
Gage accuracy is ±2% of full scale and switch repeatability is ±1%.
Switch deadband is one pointer width — less than 1% of full scale.
Compatible with air and other non-combustible, non-corrosive gases,
they can be used in systems with pressures to 25 psig (1.725 bar).
Optional construction is available for use to either 35 psig (2.42 bar)
or 80 psig (5.51 bar).
Included Accessories
Mounting ring, snap ring (4) 6-32 x 1
1
⁄4" RH machine screws
18" (45 cm) cable assembly (panel mounting)
(2)
3
⁄16" tubing to
1
⁄8" NPT adapters (3) 6-32 x
5
⁄16" RH machine screws
(2)
1
⁄8" NPT pipe plugs (surface mounting)
Series
3000MR
3000MRS
Photohelic
®
Switch/Gages
Combines Differential Pressure Gage with Low/High Set-points
SERIES 3000MR, 3000MRS PHOTOHELIC
®
SPECIFICATIONS
GAGE SPECIFICATIONS
Service: Air and non-combustible, compatible gases.
Wetted Materials: Consult factory.
Accuracy: ±2% of full scale (3000-0 ±3% of full scale). (3000-00 +4% of
full scale).
Pressure Limit: -20˝ Hg. to 25 psig (-0.677 bar to 1.72 bar). MP option;
35 psig (2.41 bar), HP option; 80 psig (5.52 bar).
Temperature Limits: 20 to 120°F. (-6.67 to 48.9°C).
Process Connections: 1/8˝ female NPT (duplicated side and back).
Size: 4˝ (101.6 mm) dial face, 5˝ (127 mm) O.D. x 3-1/8˝ (79.38 mm).
Weight: 1.8 Ib (816 g).
SWITCH SPECIFICATIONS 3000MR
Switch Type: Each setpoint has 1 Form C relays (SPDT).
Relay Contacts: (resistive load) 1 Form C rated 1.0A @ 30 VDC, 0.3A @
110 VDC or 0.5A @ 125 VAC. Gold over clad silver - suitable for dry
circuits.
Electrical Connections: 18˝ (46 cm) cable assembly with 8 conductors.
Optional lengths to 100´ (30.5 m).
Power Requirements: 24 VDC, regulated ±10%.
Mounting Orientation: Diaphragm in vertical position. Consult factory for
other position orientations.
Set Point Adjustment: Adjustable knobs on face.
Agency Approvals: CE.
SWITCH SPECIFICATIONS 3000MRS
Switch Type: Each setpoint has a solid state relay.
Switching Voltage: 20-280 VAC (47 - 63 Hz).
Switching Current: 1.0 amp (AC) max., 0.01 mA (AC) min., (2) SPST N.O.
Electrical Connections: 18˝ (46 cm) cable assembly with 6 conductors,
Optional lengths to 100´ (30.5 m).
Power Requirements: 24 VDC, regulated ±10%.
Mounting Orientation: Diaphragm in vertical position. Consult factory for
other position orientations.
Set Point Adjustment: Adjustable knobs on face.
Agency Approvals: CE.
* ±3% of full scale. **+ 4% of full scale.
O
.2O
.4O
.60
.80
1.0
INCHES OF WATER
1/8 FEMALE NPT HIGH
PRESSURE CONNECTION
1/8 FEMALE NPT HIGH
PRESSURE CONNECTION
2-1/61
[52.39]
2
[50.80]
(4) 6-32 HOLES
EQUALLY SPACED ON A
5-1/8 [130.18] B.C.
1-1/4
[31.75]
Ø4-47/64
[120.25]
Ø5
[127.00]
Ø4 [101.60]
FACE
5-1/2 [139.70] O.D.
MOUNTING RING
5/8
[15.88]
1/8 FEMALE NPT LOW
PRESSURE CONNECTION
5/8 [15.88]
PANEL MAX
3/16
[4.76]
2-1/2
[63.50]
Model
Number
3000(MR)(MRS)**-00
3000(MR)(MRS)*-0
3001(MR)(MRS)
3002(MR)(MRS)
3003(MR)(MRS)
3005(MR)(MRS)
3010(MR)(MRS)
3015(MR)(MRS)
3020(MR)(MRS)
3030(MR)(MRS)
3050(MR)(MRS)
3100(MR)(MRS)
Model
Number
3000(MR)(MRS)-60PA*
3000(MR)(MRS)-125PA
3000(MR)(MRS)-250PA
3000(MR)(MRS)-500PA
Model
Number
3000(MR)(MRS)-1KPA
3000(MR)(MRS)-3KPA
3000(MR)(MRS)-4KPA
Model
Number
3000(MR)(MRS)-6MM*
3000(MR)(MRS)-10MM
3000(MR)(MRS)-25MM
3000(MR)(MRS)-50MM
3000(MR)(MRS)-100MM
Model
Number
3000(MR)(MRS)-20CM
Range,
Kilopascals
0-1.0
0-3.0
0-4.0
Range,
MM W.C.
0-6
0-10
0-25
0-50
0-100
Range,
CM W.C.
0-20
Minor
Divs.
.02
.10
.10
Minor
Divs.
.20
.50
.50
1.0
2.0
Minor
Divs
.50
Range,
Inches w.c.
0-0.25
0-0.5
0-1.0
0-2.0
0-3.0
0-5.0
0-10
0-15
0-20
0-30
0-50
0-100
Range,
Pascals
0-60
0-125
0-250
0-500
Minor
Divs.
.005
.01
.02
.05
.10
.10
.20
.50
.50
1.0
1.0
2.0
Minor
Divs.
2.0
5.0
5.0
10.0
When ordering, select either MR or MRS suffix
to Series 3000 number.
Examples: 3001MR or 3001MRS
OPTIONS — ACCESSORIES
Tamper-proof Knobs, require spanner type key (supplied) to change set-
points. Add suffix -TAMP
Low Temperature Option for use under 20°F (-6.7°C).
Add suffix -LT
Medium Pressure increases maximum rated pressure to 35 psig
(2.41 bar). Add suffix -MP
High Pressure increases maximum rated pressure to 80 psig
(5.5 bar). Add suffix -HP
A-298 Flat Aluminum Bracket, for flush mounting 3000MR/MRS
A-370 Mounting Bracket, flush mount 3000MR/MRS bracket.
Bracket is then surface mounted.Steel with gray hammertone
epoxy finish
A-600 R/C Snubber: Recommended for inductive loads like a
solenoid or contactor