QRB1 Flame Sensing Photocell | Oil Burner Electric Eye Sensor

The QRB1 Flame Sensing Photocell is a compact, reliable photoelectric sensor designed for use with oil burners and waste oil heating systems. Acting as the "electric eye" of your burner control system, this photoresistor continuously monitors the flame, enabling automatic ignition lockout when no flame is detected — helping to maintain safe, consistent burner operation.

Measuring just 5 cm (1.96 in) in length and constructed with a durable rubber housing, the QRB1 is built to withstand the demanding environment near a burner flame. Its compact form factor makes it easy to install as a direct replacement in a wide range of standard residential and commercial oil burner setups.

Key Features

• Reliable Flame Detection: Photoelectric sensing technology continuously monitors burner flame status for accurate, responsive control.
• Compatible with Waste Oil Burners: Designed to work with standard oil and waste oil burner systems using QRB1-type photocell connections.
• Durable Rubber Housing: Protects the internal sensor from heat, vibration, and debris common in burner environments.
• Compact Size: At only 5 cm / 1.96 in, it fits easily into tight burner mounting locations.
• Direct Replacement: Standard QRB1 specification makes this a convenient drop-in replacement for worn or failed photocells.
• Easy Installation: Designed for straightforward swap-out with basic tools — no specialized equipment required.

Specifications

• Model: QRB1
• Type: Flame Sensing Photocell / Photoresistor
• Application: Oil Burner, Waste Oil Burner
• Material: Rubber (housing)
• Size: 5 cm / 1.96 in
• Color: Red
• Brand: Qme

What Is a Flame Sensing Photocell?

A flame sensing photocell (also known as a photoelectric flame sensor or electric eye) is a critical safety and control component in oil-fired heating equipment. It detects the presence of a flame using light-sensitive resistance — when a flame is present, the photocell's resistance changes, signaling the burner controller to continue operation. If no flame is detected, the controller shuts down fuel flow, preventing dangerous unburned fuel buildup. For more information on heating appliance safety, visit the U.S. Consumer Product Safety Commission – Heating Safety.

Who Is This For?

This QRB1 photocell is ideal for HVAC technicians, heating system maintenance professionals, and DIY homeowners who need a dependable, cost-effective replacement part for their oil burner or waste oil heating system. Keep a spare on hand to minimize downtime during the colder months.

Frequently Asked Questions

Q: What does the QRB1 flame sensing photocell do in a burner system?

A: The QRB1 photocell acts as the "electric eye" of the burner control system. It monitors whether a flame is present during burner operation. When the photocell detects a flame, it signals the burner controller to maintain fuel flow. If no flame is detected — for example, if ignition fails — the controller receives a shutdown signal, automatically stopping the fuel supply for safe operation.

Q: Is the QRB1 photocell compatible with my waste oil burner?

A: The QRB1 is a widely used standard photocell specification compatible with many residential and commercial oil and waste oil burner systems. We recommend cross-referencing the QRB1 part number with your existing photocell or your burner manufacturer's documentation to confirm compatibility before installation.

Q: How difficult is it to replace a burner photocell?

A: Replacing a QRB1 photocell is generally a straightforward task for those with basic technical know-how. The unit is compact and designed as a direct drop-in replacement. If you are not comfortable working with heating equipment, it is always advisable to consult a qualified HVAC technician to ensure safe and correct installation.

Q: What is the QRB1 photocell made of?

A: The QRB1 flame sensing photocell features a rubber housing that provides durability and protection against the heat, vibration, and environmental conditions typically found in oil burner installations. The sensor measures 5 cm (1.96 in) in length.