
SERIES MP
MINI-PHOTOHELIC® DIFFERENTIAL PRESSURE SWITCH/GAGE
Compact, Low Cost Switch Gage
CALIBRATION SERVICES AVAILABLE
PRESSURE
LOW PRESSURE
The Series MP Mini-Photohelic® Differential Pressure Switch/Gage combines
the time proven Minihelic
points. The Mini-Photohelic
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 the back of the unit.
BENEFITS/FEATURES
• Gage reading unaffected by switch operation and will continue to read pressure even
during power loss
• Visible switch status LED provides indication of set point switching state
• Compact design but with the power of larger devices can meet the same application
specications
APPLICATIONS
• Fume hoods
• Dust collection
• Pneumatic conveying
• Clean room
®
II differential pressure gage with two SPDT switching set
®
switch/gage is designed to measure and control positive,
PORT
PORT
3-1/32 [77.00]
Ø2-19/32
[65.88]
1 [25.4]
SPECIFICATIONS
GAGE SPECIFICATIONS
Service: Air and non-combustible, compatible gases.
Wetted Materials: Consult factory.
Accuracy: ±5% of FS @ 70ºF (21.1ºC). Gage face mounted in vertical position.
Pressure Limits: 30 psig (2.067 bar).
Temperature Limits: 20 to 120ºF (-6.7 to 49ºC).
Process Connections: Barbedfor3/16˝IDtubing(STD);1/8˝maleNPT(optional).
Size: 4-1/8˝(104.78mm)depthx3-1/16˝(77.79mm)diameter.
Weight: 23 oz (652 g).
SWITCH SPECIFICATIONS
Switch Type: (2) SPDT relays.
Electrical Rating: 5A@120/240VACresistive;5A@30VDC.
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)mountingscrews,(1).050˝hexallenwrench.
Compliance: CE, cULus.
3-1/16
[77.79]
3-1/32 [77.00]
3-13/16 [96.84]
9/32
[7.134]
MODEL CHART
Range,
Model
Inches of Water Model
MP-000
Differential Pressure
Gages/Switches, Dial
0-0.5
MP-001
0-1.0
MP-002
0-2.0
MP-003
0-3.0
MP-005
0-5.0
MP-010
0-10
MP-020
0-20
OPTIONS
To order add sufx: Description
-NIST
-NPT
Example: MP-000-NPT;Note: Allow additional lead time.
ACCESSORIES
Model Description
A-301
A-302
A-302F-A
A-489
Staticpressuretipfor1/4˝metaltubingconnection
Staticpressuretipfor3/16˝and1/8˝I.D.plasticorrubbertubing
303SSstaticpressuretipwithmountingange;for3/16˝IDrubberor
plastictubing;4˝insertiondepth;includesmountingscrews
4˝straightstaticpressuretipwithange
MP-125PA
MP-250PA
MP-500PA
Model
MP-1KPA
MP-3KPA
NISTtraceablecalibrationcerticate
1/8˝maleNPTconnections
Range,
Pa
0-125
0-250
0-500
Range,
kPa
0-1
0-3
DWYER INSTRUMENTS, LLC | dwyer-inst.com44
Process Tubing Options: See page 453 (Gage Tubing Accessories)