Explosion Proof Photocell | 1/2 in or 3/4 in NPT | Attaches to Fixture Knockout | Class 1 Div 2 | Class 2 Div 2

Product Overview

This explosion proof photocell provides automatic on/off light control for fixtures installed in classified hazardous locations. The unit mounts directly to a lighting fixture knockout or to an existing junction box using either 1/2 inch or 3/4 inch NPT threading.

The photocell is rated for Class I Division 2 (Groups A, B, C, D), Class II Division 1 (Groups E, F, G), Class II Division 2 (Groups F, G), and Class III environments. It carries UL 844 listing for hazardous locations and UL 1598 listing for wet locations. The unit is also UL 1598A listed as Marine Outside Type and holds ABS certification.

Physical dimensions are 5.6 x 5.6 x 4.2 inches. The housing carries an IP65 rating and is ETL listed. We back this photocell with a 5-year warranty.

Where This Product Fits Best

This photocell is built for facilities where flammable gases, vapors, dusts, or fibers may be present. Class I Division 2 coverage addresses areas where ignitable concentrations of gases or vapors are not normally present but may occur under abnormal conditions. Class II Division 1 and Division 2 ratings extend use into combustible dust environments.

The UL 1598A Marine Outside Type listing makes this unit appropriate for marine vessels and offshore installations where equipment must withstand saltwater exposure and corrosive conditions. Wet location suitability allows outdoor mounting without supplemental enclosures.

Typical deployment includes refineries, chemical processing plants, grain handling facilities, fuel storage areas, paint spray operations, and marine deck lighting systems.

Performance and Functional Considerations

This is an on/off photocell only. It does not provide dimming capability, scheduling functions, or adjustable light level thresholds. The photocell switches fixtures on when ambient light drops below its sensing threshold and switches them off when light returns.

The IP65 rating means the unit is protected against dust ingress and water jets from any direction. This allows reliable operation in industrial environments with airborne particulates, washdown procedures, or direct weather exposure.

Installation and Long-Term Use

The photocell threads into standard 1/2 inch or 3/4 inch NPT knockouts. It can attach directly to a compatible explosion proof fixture or mount to a separate junction box where fixture-direct mounting is not practical.

No field wiring adjustments or configuration is required beyond the physical connection. The on/off function operates automatically based on ambient light conditions. Long-term maintenance involves periodic inspection of the sensing window for contamination that could affect light detection.

How This Fixture Is Commonly Used

Facilities use this photocell to automate exterior and area lighting in hazardous classified zones where manual switching is impractical or where lights must respond to daylight conditions without operator intervention. Once installed, the photocell handles daily on/off cycling without any user input.

In marine applications, the unit controls deck lighting, walkway fixtures, and perimeter illumination on vessels or offshore platforms. The automatic operation reduces crew workload and ensures lighting activates consistently at dusk regardless of shift schedules or personnel availability.

Safety, Certifications, and Warranty

This photocell is UL 844 listed for hazardous locations, UL 1598 listed for wet locations, and UL 1598A listed as Marine Outside Type. It is ETL listed and holds ABS certification.

Hazardous location ratings include Class I Division 2 Groups A, B, C, D; Class II Division 1 Groups E, F, G; Class II Division 2 Groups F, G; and Class III. We provide a 5-year warranty on this product.

Frequently Asked Questions

What hazardous location classifications does this photocell cover?
Class I Division 2 (Groups A, B, C, D), Class II Division 1 (Groups E, F, G), Class II Division 2 (Groups F, G), and Class III.

What NPT sizes are available for mounting?
The photocell accepts 1/2 inch or 3/4 inch NPT connections.

Does this photocell dim or just switch on and off?
On/off only. There is no dimming function.

Is this rated for outdoor wet locations?
Yes. It carries UL 1598 wet location listing and IP65 protection against dust and water jets.

Can this be used on marine vessels?
Yes. It is UL 1598A listed as Marine Outside Type and holds ABS certification.

What is the warranty?
5 years.

Application Questions and Clarification

This product description reflects the provided specifications, ratings, and configuration options. For questions related to site-specific conditions, electrical compatibility, control integration, or application requirements not addressed in the provided data, our team is available to provide clarification.