Mini Photohelic Differential Pressure Switch

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Mini Photohelic Differential Pressure Switch Specification

Seal Material
Silicone Rubber

Grade
Industrial Grade

Display
Analog

Outer Size
Mini (Approx. 76mm)

Bourdon Tube
No

Thread
1/8 NPT

Sensor Type
Differential Pressure

Material
ABS Plastic, Aluminum Casing

Dial Material
Polycarbonate

Pointer Material
Aluminum

Processing Type
Machined

Diameter
76 mm

Glass Size
Mini Circular

Mount Type
Flush, Panel Mount

Scale Range
0-60 Pa

Accuracy
2% of Full Scale

Finishing
Powder Coated

Measure Pressure Of
Air and Non-Corrosive Gases

Accessories
Mounting Hardware, Instruction Manual

About Mini Photohelic Differential Pressure Switch

Mini Photohelic Differential Pressure Switch

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.

GAGE SPECIFICATIONS
Service: Air and non-combustible, compatible gases.
Wetted Materials: Consult factory.
Accuracy: 5% of FS @ 70F (21.1C). Gage face mounted in vertical position.
Pressure Limits: 30 psig (2.067 bar).
Temperature Limits: 20 to 120F (-6.7 to 49C).
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.

Compact and Reliable Design

Built for industrial applications, this mini differential pressure switch comes with a sturdy ABS plastic body, aluminum casing, and clear acrylic window. Its 76 mm diameter ensures a space-saving installation, while IP54 protection provides resistance against dust and splashes, making it dependable in diverse environments.

Flexible Operation and Easy Setup

Featuring an adjustable set point and SPDT micro switch, this pressure switch adapts easily to system requirements. No external power is needed, simplifying installation. The supplied mounting hardware and comprehensive instruction manual assist in quick, secure setup for both flush and panel mounting.

Accurate and Fast Measurement

With a scale range of 0-60 Pa, 2% full-scale accuracy, and 1% repeatability, the device delivers reliable readings within less than one second. Its designed for precise monitoring of air and non-corrosive gases, making it ideal for HVAC systems, cleanrooms, and process control applications.

FAQs of Mini Photohelic Differential Pressure Switch:

Q: How does the Mini Photohelic Differential Pressure Switch operate without a power supply?

A: This switch functions mechanically, using a differential pressure sensor and SPDT micro switch. It does not rely on external power. Differential air or gas pressure moves the mechanical components, triggering the switch and analog display accordingly.

Q: What environments are suitable for installing this device?

A: Designed with an IP54 rating and an ambient temperature range from -20C to +60C, the switch is suitable for most industrial environments where protection against dust and minor splashes is important, such as laboratories or manufacturing facilities.

Q: When should I use the adjustable set point feature?

A: The adjustable set point allows you to select the specific differential pressure at which the switch operates. Use this feature during setup or system tuning to optimize control, ensuring the switch triggers only at your chosen pressure threshold.

Q: Where does the Mini Photohelic Differential Pressure Switch measure pressure from?

A: The device uses 1/8 NPT female connections for both low and high pressure inputs. It measures the difference between these two points, so proper installation is essential for correct operation in your air or non-corrosive gas system.

Q: What is the process for mounting this differential pressure switch?

A: The unit supports both flush and panel mounting. Use the provided mounting hardware and instruction manual to secure the device in position, ensuring a snug fit and correct orientation for clear analog display reading.

Q: How does this switch benefit my application?

A: The Mini Photohelic Switch provides rapid, accurate differential pressure monitoring and control, safeguarding equipment and maintaining process stability. Its robust build, CE compliance, and low maintenance needs translate into enhanced operational reliability and efficiency.

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