Skip to the beginning of the images gallery

Mini-Photohelic® Differential Pressure Switch/Gage, Left Angle (MP-000 shown)

Series MP Mini-Photohelic® Differential Pressure Switch/Gage

Series A3000 Photohelic® Pressure Switch/Gage

Series 3000MR/3000MRS Photohelic® Switch/Gage

Combines Differential Pressure Gage with Low/High Set-Points, Compact Size

Using solid state technology, the Series 3000MR/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 or surface mounted with hardware supplied. 3000MR models employ versatile electromechanical 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.

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
18" (45 cm) cable assembly
(2) 3/16" tubing to 1/8" NPT adapters
(2) 1/8" NPT pipe plugs
(4) 6-32 x 1-1/4" RH machine screws (panel mounting)
(3) 6-32 x 5/16" RH machine screws (surface mounting)

Please see Series AT-3000MR/MRS for ATEX approved.

NIST CALIBRATION available in Product Configurator.

Product Applications

Pneumatic Conveying
Air Conditioning Systems
Clean Rooms

Starting at $636.50

Ordering

Grouped product items
Model	Description	Availability*	Price
3000MR-0	Pressure switch/gage, range 0-0.5" w.c., .01 minor divisions.	1-3 days*	$636.50
3000MR-100MM	Pressure switch/gage, range 0-100 mm w.c., 2.0 minor divisions.	1-3 days*	$636.50
3000MR-10MM	Pressure switch/gage, range 0-10 mm w.c., .50 minor divisions.	1-2 Weeks*	$636.50
3000MR-125PA	Pressure switch/gage, range 0-125 Pa, 5.0 minor divisions.	1-3 days*	$636.50
3000MR-1KPA	Pressure switch/gage, range 0-1 kPa, .02 minor divisions.	1-3 days*	$636.50
3000MR-20CM	Pressure switch/gage, range 0-20 cm w.c., .50 minor divisions.	1-3 days*	$636.50
3000MR-250PA	Pressure switch/gage, range 0-250 Pa, 5.0 minor divisions.	1-3 days*	$636.50
3000MR-25MM	Pressure switch/gage, range 0-25 mm w.c., .50 minor divisions.	1-2 Weeks*	$636.50
3000MR-3KPA	Pressure switch/gage, range 0-3 kPa, .10 minor divisions.	1-3 days*	$636.50
3000MR-4KPA	Pressure switch/gage, range 0-4 kPa, .10 minor divisions.	1-2 Weeks*	$636.50
3000MR-500PA	Pressure switch/gage, range 0-500 Pa, 10.0 minor divisions.	1-3 days*	$636.50
3000MR-50MM	Pressure switch/gage, range 0-50 mm w.c., 1.0 minor divisions.	1-3 days*	$636.50
3000MR-60PA	Pressure switch/gage, range 0-60 Pa, 2.0 minor divisions.	1-3 days*	$662.50
3000MR-6MM	Pressure switch/gage, range 0-6 mm w.c., .20 minor divisions.	1-2 Weeks*	$662.50
3000MRS-0	Pressure switch/gage, range 0-0.5" w.c., .01 minor divisions.	1-2 Weeks*	$663.50
3000MRS-100MM	Pressure switch/gage, range 0-100 mm w.c., 2.0 minor divisions.	1-2 Weeks*	$663.50
3000MRS-10MM	Pressure switch/gage, range 0-10 mm w.c., .50 minor divisions.	1-2 Weeks*	$663.50
3000MRS-125PA	Pressure switch/gage, range 0-125 Pa, 5.0 minor divisions.	1-2 Weeks*	$663.50
3000MRS-1KPA	Pressure switch/gage, range 0-1 kPa, .02 minor divisions.	1-2 Weeks*	$663.50
3000MRS-20CM	Pressure switch/gage, range 0-20 cm w.c., .50 minor divisions.	1-2 Weeks*	$663.50
3000MRS-250PA	Pressure switch/gage, range 0-250 Pa, 5.0 minor divisions.	1-2 Weeks*	$663.50
3000MRS-25MM	Pressure switch/gage, range 0-25 mm w.c., .50 minor divisions.	1-2 Weeks*	$663.50
3000MRS-3KPA	Pressure switch/gage, range 0-3 kPa, .10 minor divisions.	1-2 Weeks*	$663.50
3000MRS-4KPA	Pressure switch/gage, range 0-4 kPa, .10 minor divisions.	1-2 Weeks*	$663.50
3000MRS-500PA	Pressure switch/gage, range 0-500 Pa, 10.0 minor divisions.	1-2 Weeks*	$663.50
3000MRS-50MM	Pressure switch/gage, range 0-50 mm w.c., 1.0 minor divisions.	1-2 Weeks*	$663.50
3000MRS-60PA	Pressure switch/gage, range 0-60 Pa, 2.0 minor divisions.	1-2 Weeks*	$694.70
3000MRS-6MM	Pressure switch/gage, range 0-6 mm w.c., .20 minor divisions.	1-2 Weeks*	$694.70
3001MR	Pressure switch/gage, range 0-1" w.c., .02 minor divisions.	1-3 days*	$636.50
3001MRS	Pressure switch/gage, range 0-1" w.c., .02 minor divisions.	1-2 Weeks*	$663.50
3002MR	Pressure switch/gage, range 0-2" w.c., .05 minor divisions.	1-3 days*	$636.50
3002MRS	Pressure switch/gage, range 0-2" w.c., .05 minor divisions.	1-2 Weeks*	$663.50
3003MR	Pressure switch/gage, range 0-3" w.c., .10 minor divisions.	1-3 days*	$636.50
3003MRS	Pressure switch/gage, range 0-3" w.c., .10 minor divisions.	1-2 Weeks*	$663.50
3005MR	Pressure switch/gage, range 0-5" w.c., .10 minor divisions.	1-3 days*	$636.50
3005MRS	Pressure switch/gage, range 0-5" w.c., .10 minor divisions.	1-2 Weeks*	$663.50
3010MR	Pressure switch/gage, range 0-10" w.c., .20 minor divisions.	1-3 days*	$636.50
3010MRS	Pressure switch/gage, range 0-10" w.c., .20 minor divisions.	1-2 Weeks*	$663.50
3015MR	Pressure switch/gage, range 0-15" w.c., .50 minor divisions.	1-3 days*	$636.50
3015MRS	Pressure switch/gage, range 0-15" w.c., .50 minor divisions.	1-2 Weeks*	$663.50
3020MR	Pressure switch/gage, range 0-20" w.c., .50 minor divisions.	1-3 days*	$636.50
3020MRS	Pressure switch/gage, range 0-20" w.c., .50 minor divisions.	1-2 Weeks*	$663.50
3030MR	Pressure switch/gage, range 0-30" w.c., 1.0 minor divisions.	1-3 days*	$636.50
3030MRS	Pressure switch/gage, range 0-30" w.c., 1.0 minor divisions.	1-2 Weeks*	$663.50
3050MR	Pressure switch/gage, range 0-50" w.c., 1.0 minor divisions.	1-2 Weeks*	$636.50
3050MRS	Pressure switch/gage, range 0-50" w.c., 1.0 minor divisions.	1-2 Weeks*	$663.50
3100MR	Pressure switch/gage, range 0-100" w.c., 2.0 minor divisions.	1-2 Weeks*	$636.50
3100MRS	Pressure switch/gage, range 0-100" w.c., 2.0 minor divisions.	1-2 Weeks*	$663.50

Specifications

: GAGE SPECIFICATIONS
Service:: Air and non-combustible, compatible gases.
Wetted Materials:: Consult factory.
Accuracy:: ±2% of FS (3000-0 ±3% of FS). (3000-00 ±4% of FS).
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) OD 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 NO.
Electrical Connections:: 18" (46 cm) cable assembly with 6 conductors, optional lengths to 100' (30.5 m).
Power Requirements:: 24 VDC, regulated ±10%. 24VAC optional.
Mounting Orientation:: Diaphragm in vertical position. Consult factory for other position orientations.
Set Point Adjustment:: Adjustable knobs on face.
Compliance:: CE.

Features

Gage reading unaffected by switch operation and will continue to read pressure even during power loss
Zero and range adjustments outside of gage means no disassembly in normal service
Solid-state design allows for switching in high cycle rate applications without degradation

Options

-TAMP Tamper-Proof Knobs, require special spanner-type key (included) to adjust set points.
-LT Low Temperature Option for use under 20°F (-6.7°C).
-MP Medium Pressure increases maximum rated pressure to 35 psig (2.41 bar).
-WP Weatherproof housing option.
-HP High Pressure increases maximum rated pressure to 80 psig (5.5 bar).

Support Library

Product Literature

Manuals

Catalog Pages

Series 3000MR/3000MRS Catalog Page

Product Data Sheet

3000MR/MRS

SlideShare

Approvals

Drawings

Videos

Model Chart

EXAMPLE	3000	MR	00	24VAC	Series 3000MR-00-24VAC Photohelic® Switch/Gage, range 0-.025" w.c., electromechanical relays, with 24VAC relay pack.
RELAY TYPE		MR MRS			Electromechanical Relays Solid State Relays
RANGE	3000 3000 3001 3002 3003 3004 3005 3006 3008 3010 3015 3020 3025 3030 3040 3050 3060 3080 3100 3150 3000 3300 3301 3302 3304 3310 3320 3330 3340 3360 3380 3000 3000 3201 3202 3203 3204 3205 3210 3215 3220 3230 3000 3000 3000 3000 3000 3000 3000 3000 3000 3000 3000 3000 3000 3000 3000 3000 3000 3000 3000 3000 3000 3300 3300 3300 3000 3000 3000 3000 3000 3000 3000 3000 3000 3000 3000 3000 3000 3000 3000 3000 3000 3000 3300 3300 3300 3300 3000 3000 3000 3000 3000 3000 3300 3300 3300 3000 3000 3000 3000 3000 3000 3000 3000 3000 3000 3000 3000 3000 3000 3300 3300 3300 3000 3000 3000		00 0 00N 0 00AV 0AV 5HG 10HG 15HG 20HG 25HG 30HG 40HG 50HG 60HG 6MM 10MM 20MM 25MM 30MM 50MM 80MM 100MM 150MM 250MM 300MM 500MM 20MM 30MM 40MM 1CM 2CM 5CM 8CM 10CM 15CM 20CM 25CM 30CM 40CM 50CM 80CM 100CM 150CM 200CM 250CM 300CM 500CM 4CM 10CM 20CM 30CM 60PA 125PA 200PA 250PA 500PA 750PA 120PA 250PA 500PA 1KPA 1.5KPA 2KPA 3KPA 4KPA 5KPA 8KPA 10KPA 15KPA 20KPA 25KPA 30KPA 40KPA 50KPA 1KPA 2KPA 3KPA 20MBAR 100MBAR 500MBAR		0-0.25" w.c. 0-0.5" w.c. 0-1" w.c. 0-2" w.c. 0-3" w.c. 0-4" w.c. 0-5" w.c. 0-6" w.c. 0-8" w.c. 0-10" w.c. 0-15" w.c. 0-20" w.c. 0-25" w.c. 0-30" w.c. 0-40" w.c. 0-50" w.c. 0-60" w.c. 0-80" w.c. 0-100" w.c. 0-150" w.c. .05-0-.2" w.c. .25-0-.25" w.c. .5-0-.5" w.c. 1-0-1" w.c. 2-0-2" w.c. 5-0-5" w.c. 10-0-10" w.c. 15-0-15" w.c. 20-0-20” w.c. 30-0-30“ w.c. 40-0-40” w.c. 0-.25" w.c. & 300-2000 FPM AV 0-.5" w.c. & 500-2800 FPM AV 0-1 psid 0-2 psid 0-3 psid 0-4 psid 0-5 psid 0-10 psid 0-15 psid 0-20 psid 0-30 psid 0-5" Hg 0-10" Hg 0-15" Hg 0-20" Hg 0-25" Hg 0-30" Hg 0-40" Hg 0-50" Hg 0-60" Hg 0-6 mm w.c. 0-10 mm w.c. 0-20 mm w.c. 0-25 mm w.c. 0-30 mm w.c. 0-50 mm w.c. 0-80 mm w.c. 0-100 mm w.c. 0-150 mm w.c. 0-250 mm w.c. 0-300 mm w.c. 0-500 mm w.c. 10-0-10 mm w.c. 15-0-15 mm w.c. 20-0-20 mm w.c. 0-1 cm w.c. 0-2 cm w.c. 0-5 cm w.c. 0-8 cm w.c. 0-10 cm w.c. 0-15 cm w.c. 0-20 cm w.c. 0-25 cm w.c. 0-30 cm w.c. 0-40 cm w.c. 0-50 cm w.c. 0-80 cm w.c. 0-100 cm w.c. 0-150 cm w.c. 0-200 cm w.c. 0-250 cm w.c. 0-300 cm w.c. 0-500 cm w.c. 2-0-2 cm w.c. 5-0-5 cm w.c. 10-0-10 cm w.c. 15-0-15 cm w.c. 0-60 Pa 0-125 Pa 0-200 Pa 0-250 Pa 0-500 Pa 0-750 Pa 60-0-60 Pa 125-0-125 Pa 250-0-250 Pa 0-1 kPa 0-1.5 kPa 0-2 kPa 0-3 kPa 0-4 kPa 0-5 kPa 0-8 kPa 0-10 kPa 0-15 kPa 0-20 kPa 0-25 kPa 0-30 kPa 0-40 kPa 0-50 kPa .5-0-.5 kPa 0-2 kPa 1.5-0-1.5 kPa 0-20 mbar 0-100 mbar 0-500 mbar
OPTIONS				24VAC AT COO DEED EDED EDDE EXPL G HC HP LT M MP NIST R CBL3 CBL5 CBL10 CBL15 CBL20 CBL25 CBL30 CBL40 CBL50 CBL60 CBL70 CBL80 CBL90 CBL100 SF SS ST TA TAMP WP VIT Y	24 VAC (24 VDC is std if not specified) Aluminum Tag Certificate of Origin 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) Explosion-proof Housing with Breather & Drain Green Scale Overlay Horizontal Calibration (90° face up) High Pressure Low Temperature Mirror Scale Overlay Medium Pressure NIST Certificate of Calibration Red Scale Overlay 3 Ft. Cable (valid with -MR only) 5 Ft. Cable 10 Ft. Cable 15 Ft. Cable 20 Ft. Cable 25 Ft. Cable 30 Ft. Cable 40 Ft. Cable 50 Ft. Cable 60 Ft. Cable 70 Ft. Cable 80 Ft. Cable 90 Ft. Cable 100 Ft. Cable Silicon Free Brushed S301 Stainless Steel Bezel Stainless Steel Tag Tilt Angle from Vertical in Degrees (-90 to 90) Tamperproof Knobs Weatherproof Housing FKM Elastomers Yellow Scale Overlay

FAQ

Questions

Question

What is the NEMA rating of a Photohelic®?

Answer

Our standard is considered to be NEMA 1 rated for general purpose. We do have weatherproof (NEMA 4X) and explosion-proof (NEMA 7 & 9) enclosures available.

Related

Series 3000MR/3000MRS

Series A3000

Series 43000

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.

Related

Series MP

Series 3000MR/3000MRS

Question

What is the power consumption (watts) for a model 3000mr photohelix?

Answer

The power consumption for the Series 3000MR Photohelic switch/gage is 3 Watts.

Related

Series 3000MR/3000MRS

Question

We have a Photohelic model 3000-OMR what is the correct replacement model? Is a 3000MR-O the same thing?

Answer

Based on the range of 0-0.5 inches of water and the 3000MR/MRS series, the part number is 3000MR-0.

Related

Series 3000MR/3000MRS

Question

Will a Dwyer pressure switch be damaged if the pressure exceeding the maximum set-point is applied to the switch?

Answer

No. Not unless the maximum pressure rating of the switch is exceeded.

Related

Series A-3000

Series PDPS

Series 3000MR/3000MRS

Series ADPS/EDPS

Series 1900

Series 1800

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.

Related

Series MP

Series 2000-SP

Series 2000

Series 3000MR/3000MRS

Series 605

Series DCTE

Series A3000

Series 43000

Apps

Air Velocity and Flow Calculator

Reviews

Write Your Own Review

Only registered users can write reviews. Please Sign in or create an account

Accessories

Model	Description	Availability*	Price
A-298	Flat aluminum bracket for flush mounting (for Series A3000 Photohelic®, Series 4000 Capsuhelic®, Series 605, and Series 3000MR)	1-3 days*	$37.65
A-320-B1	Weatherproof enclosure, ABS, compatible with Series 3000MR/MRS Photohelic®, Series 605 Magnehelic®, Series DH3 Digihelic® (to fit, the casing on the electrical plug must be removed), Series 2000 Magnehelic® with medium and high pressure options	1-3 days*	$326.00
A-320-BC	Weatherproof enclosure, ABS, compatible with Series 2000 Magnehelic®, DM-1000 DigiMag®, DM-2000, Series 605 (with -SS option), instruments with backwards compatible bezel option	1-3 days*	$326.00
A-370	Flush mount bracket used with: Photohelic® 3000MR/MRS, Capsuhelic®, 631B Transmitter. Bracket is then surface mounted. Steel with gray hammertone epoxy finish.	1-3 days*	$45.40
A-600	R/C snubber (recommended for inductive loads like a solenoid or contactor)	1-3 days*	$25.75
410518-00	Adjustment tool for tamper-proof option	1-2 Weeks*	$3.95
200840-00	Ribbon cable assembly for A3000 Photohelic® switch/gage, 1 foot length	1-2 Weeks*	$38.50