Series MP Mini-Photohelic® Differential Pressure Switch/Gage

Compact, Low Cost Switch/Gage

The Series MP Mini-Photohelic® differential pressure switch/gage combines the time proven Minihelic® II differential pressure gage with two SPDT switching set points. The Mini-Photohelic® switch/gage is designed to measure and control positive, negative, or differential pressures consisting of non-combustible and non-corrosive gases. Gage reading is independent of switch operation. Switching status is visible by LED indicators located on the front and rear of the gage. Set points are adjusted with push buttons on back of unit. This extremely compact switch/gage is ideal for fume hoods, dust collection, pneumatic conveying and clean room applications.

Models & Ordering

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Model Number Description Usually Ships Price Order
MP-000 Differential pressure switch/gage, range 0-0.5" water. Same Day $240.00 Order
MP-001 Differential pressure switch/gage, range 0-1.0" water. Same Day $240.00 Order
MP-002 Differential pressure switch/gage, range 0-2.0" water. Same Day $240.00 Order
MP-003 Differential pressure switch/gage, range 0-3.0" water. Same Day $240.00 Order
MP-005 Differential pressure switch/gage, range 0-5.0" water. Same Day $240.00 Order
MP-010 Differential pressure switch/gage, range 0-10" water. Same Day $240.00 Order
MP-020 Differential pressure switch/gage, range 0-20" water. Same Day $240.00 Order

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Specifications

GAGE SPECIFICATIONS
Service: Air and non-combustible, compatible gases.
Wetted Materials: Consult factory.
Accuracy: ±5% of FS @ 70°F (21.1°C). Gage face mounted in vertical position.
Pressure Limits: 30 psig (2.067 bar).
Temperature Limits: 20 to 120°F (-6.7 to 49°C).
Process Connections: Barbed for 3/16" I.D. tubing; 1/8" male NPT optional.
Size: 4-1/8" (104.78 mm) depth x 3-1/16" (77.79 mm) diameter.
Weight: 23 oz (652 g).

SWITCH SPECIFICATIONS
Switch Type: (2) SPDT relays.
Electrical Rating: 5A @ 120/240 VAC Resistive; 5A @ 30 VDC.
Electrical Connections: Screw type terminal block. Accepts 22-12 AWG wire.
Power Requirements: 24 VDC/24 VAC 50/60 Hz 4 watts.
Mounting Orientation: Gage face in vertical position.
Set Point Adjustment: Push Buttons.
Standard Accessories: (2) mounting screws, (1) .050" hex allen wrench.
Agency Approvals: CE, cUL, UL.

Options

  • For optional 1/8" male NPT connections, add suffix -NPT to model numbers.
    Example: MP-000-NPT. No extra charge. Allow additional lead time.

Accessories

Model Number Description Usually Ships Price Order
A-301 Static pressure tip, for 1/4" metal tubing connection. Same Day $9.90 Order
A-302 Static pressure tip, for 3/16" and 1/8" ID plastic or rubber tubing. Same Day $9.10 Order
A-302F-A 303SS static pressure tip with mounting flange, 4" hook style. For 3/16" ID rubber or plastic tubing, includes mounting screws. Same Day $9.10 Order
A-489 4" 303 SS straight static pressure tip with flange. Same Day $6.67 Order

Model Chart

EXAMPLE MP 000 AT Series MP-000-AT Mini-Photohelic® Differential Pressure Switch/Gage, range 0-0.5" w.c., with aluminum tag.
SERIES MP     Mini-Photohelic® Differential Pressure Switch/Gage
RANGE   000
001
002
003
005
010
020
040
060
100
5PSI
10PSI
15PSI
25MM
50MM
100MM
125PA
250PA
500PA
1KPA
3KPA
10KPA
  0-0.5" w.c.
0-1" w.c.
0-2" w.c.
0-3" w.c.
0-5" w.c.
0-10" w.c.
0-20" w.c.
0-40" w.c.
0-60" w.c.
0-100" w.c.
0-5 psi
0-10 psi
0-15 psi
0-25 mm w.c.
0-50 mm w.c.
0-100 mm w.c.
0-125 Pa
0-250 Pa
0-500 Pa
0-1 kPa
0-3 kPa
0-10 kPa
OPTIONS     AT
DEED
EDED
EDDE
HL
LH
LL
NIST
NPT
Aluminum Tag
Energizing (set point low: de-energizing/energizing; set point high: energizing/de-energizing)
Energizing (set point low: energizing/de-energizing; set point high: energizing/de-energizing)
Energizing (set point low: energizing/de-energizing; set point high: de-energizing/energizing)
Latching Option (high/low)
Latching Option (low/high)
Latching Option (low/low)
NIST Certificate of Calibration
NPT Connections 

Product Literature

Manuals

Catalog Pages

Approvals

Drawings

Questions

Question
What restrictions, if any, are imposed for the Magnehelic® and Photohelic® gages in vacuum service?
Answer
In applications involving higher vacuums than 20" Hg, leakage due to gage housing porosity becomes the limiting factor.
Question
Your catalog says the A3000 series photohelic needs 120VAC, but "Special units for other voltages are available." Does that mean I can order a 24VDC model? If so, what would the part no. be? Thanks
Answer
We do offer two voltage options which are -24VAC: 24 VAC Relay Pack or -240 VAC: 220/240 VAC Relay Pack. Unfortunately we do not offer a VDC option with the A3000 Series. However, you could consider the Series MP, Mini-Photohelic Differential Pressure Switch/Gage or the Series 3000 MR or 3000 MRS which all offer the 24 VDC Power Requirement.

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