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

Product Overview

Explosion Proof Photocell is designed for on/off control of hazardous location lighting fixtures. It mounts directly to a fixture knockout using either 1/2 inch or 3/4 inch NPT, supporting straightforward integration with explosion proof luminaires. This photocell is suitable for use in environments requiring Class I Division 2, Class II Division 1 and 2, and Class III protection, including paint booths and chemical processing areas.

The unit operates on 100-277V and is built for use in wet, marine, and corrosive environments. Typical installations include hazardous location lighting upgrades or new builds where automated dusk-to-dawn operation is required. The compact form factor allows for installation in confined or space-limited fixture locations.

Core Performance and Output

This explosion proof photocell provides reliable on/off switching based on ambient light levels. It is rated for 100-277V operation, supporting a wide range of hazardous location fixtures. The device is designed for use in environments where electrical safety and compliance are critical, including areas with flammable gases, vapors, dusts, or fibers.

IP65 ingress protection and UL 844, UL 1598, and UL 1598A certifications ensure performance in wet, marine, and outdoor locations. The photocell is not intended for dimming or advanced control schemes; it provides basic dusk-to-dawn automation. Excessive fixture wattage or non-standard mounting may require additional review for compatibility.

Adjustability and Control Options

This photocell offers fixed on/off control based on preset light level thresholds. There are no user-adjustable sensitivity or time delay settings. The device is designed for straightforward dusk-to-dawn operation without manual override or remote control capability.

Integration is limited to on/off switching of compatible hazardous location fixtures. For applications requiring dimming, scheduling, or networked controls, a different control solution is required.

Longevity and Reliability

The photocell is constructed for long-term operation in hazardous, wet, and marine environments. It is rated for continuous use at ambient temperatures from -22°F to 122°F. The sealed housing and IP65 rating protect internal components from dust, water, and corrosive agents.

All units are covered by a 5-year warranty. Reliability is supported by compliance with UL 844, UL 1598, UL 1598A, and ABS standards. No routine maintenance is required beyond periodic inspection for physical damage or contamination.

Build Quality and Physical Characteristics

The housing is engineered for hazardous location use, with robust gasketing and corrosion-resistant materials. The device measures 5.6 x 5.6 x 4.2 inches, allowing installation in tight fixture spaces. NPT threading supports secure attachment to standard fixture knockouts.

All seals and joints are designed to prevent ingress of dust, water, and vapors. The unit is suitable for both indoor and outdoor hazardous environments, including marine and chemical processing areas.

Where This Product Fits Best

This explosion proof photocell is intended for hazardous, explosive, and corrosive environments where automated dusk-to-dawn lighting control is required. It is commonly installed in:

• hazardous location lighting
• explosion proof lighting
• paint booth lighting
• chemical processing facility lighting
• oil and gas facility lighting
• refinery lighting
• marine environment lighting
• wastewater treatment lighting

Environmental characteristics include exposure to flammable gases, vapors, dusts, or fibers, as well as wet, marine, or corrosive conditions. The photocell is suitable for both indoor and outdoor hazardous locations.

Installation and Long-Term Use

The photocell attaches directly to a fixture knockout using 1/2 inch or 3/4 inch NPT threading. Installation requires access to the fixture body and proper sealing to maintain hazardous location integrity. The compact size supports use in fixtures with limited space.

Once installed, the device operates automatically with no user intervention. Periodic inspection is recommended to ensure the housing remains sealed and free of debris. The unit is designed for long-term use in harsh environments with minimal maintenance requirements.

How This Fixture Is Commonly Used

Explosion proof photocells are typically installed on hazardous location fixtures mounted in areas such as paint booths, chemical processing rooms, or outdoor refinery sites. Mounting height is determined by the fixture location, with most installations at standard ceiling or wall heights for the application.

Spacing and layout are dictated by the lighting design, not the photocell itself. In multi-fixture layouts, a single photocell may control multiple fixtures if wired accordingly. Using higher wattage fixtures may reduce the number of luminaires needed, but can increase the risk of glare or over-lighting in confined spaces.

Safety, Certifications, and Warranty

This explosion proof photocell is certified to UL 844, Class I Division 2, Class II Division 1 and 2, Class III, UL 1598, UL 1598A, and ABS standards. It is rated IP65 for dust and water ingress protection. The device is suitable for marine outside type environments and is ETL listed.

Operating temperature range is -22°F to 122°F. The product includes a 5-year warranty covering manufacturing defects and operational reliability under normal use conditions.

Frequently Asked Questions

Q: What voltage range does this explosion proof photocell support?

A: The photocell operates on 100-277V AC.

Q: Can this photocell be used for dimming or advanced lighting controls?

A: No, this device provides on/off control only and does not support dimming or networked control functions.

Q: What certifications does this photocell carry?

A: UL 844, Class I Division 2, Class II Division 1 and 2, Class III, UL 1598, UL 1598A, ABS, and ETL.

Q: What is the recommended installation method?

A: The photocell attaches to a fixture knockout using 1/2 inch or 3/4 inch NPT threading. Proper sealing is required to maintain hazardous location integrity.

Q: How should fixture layout or spacing be planned when using this photocell?

A: Fixture layout is determined by the lighting design and application requirements. The photocell can control a single fixture or multiple fixtures if wired accordingly.

Application Questions and Clarification

Q: Is this photocell suitable for use in marine or offshore hazardous locations?

A: Yes, the device is certified for marine outside type environments and is suitable for offshore or coastal hazardous locations.

Q: Can this photocell be used in paint booth lighting applications?

A: Yes, it is designed for use in paint booth lighting and other hazardous location lighting applications requiring explosion proof controls.

Q: What is the ingress protection rating of this photocell?

A: The photocell is rated IP65 for dust and water ingress protection.

Q: Are there any user-adjustable settings on this device?

A: No, the photocell has fixed on/off operation with no user-adjustable sensitivity or delay settings.