How to Identify a UV Lamp for Replacement
UV lamps are not universal components. Even small differences in size, electrical specifications, or connection style can affect compatibility, curing performance, and system operation.
If a part number is missing or unreadable, a UV lamp can still be accurately identified using system information, physical measurements, and construction details.
Start Here: How to Identify Your UV Lamp
- Check for part numbers or etched markings
- Identify the machine or UV system
- Measure the lamp (length, arc, diameter)
- Identify the end caps or terminal style
- Confirm electrical specifications (volts, watts, amps)
In most cases, these steps are enough to determine the correct replacement.
1. Check for Part Numbers or Etching
The fastest way to identify a UV lamp is by reading any markings on the lamp itself.
Look for:
- Part numbers
- Manufacturer codes
- Serial numbers
These markings are typically located on the quartz tube or ceramic end caps. If readable, they provide the most direct path to identification.
2. Identify the UV System or Machine
If no markings are visible, the next step is to identify the equipment the lamp came from.
- Machine manufacturer (IST, GEW, Fusion, Baldwin, etc.)
- Model and year
- Application (printing, coating, curing)
This information helps narrow down compatible lamp types and specifications.
3. Measure the Lamp
When part numbers are unavailable, physical measurements are the most reliable way to identify a UV lamp.
Total Overall Length
Measure from one end of the lamp to the other.
Arc Length (Heated Length)
The arc length is the active section that produces UV energy. This is critical for matching curing performance.
Quartz Tube Diameter
Measure the outer diameter of the quartz tube in millimeters.
Lead Wire Length
If the lamp has wires, measure both left and right lead lengths separately.
4. Identify the End Cap or Terminal Style
The end cap determines how the lamp connects to the system. This is one of the most important identification factors.
Common styles include:
- Ceramic ends
- Metal ends
- Pins, clips, or ring terminals
- R7S-style connections
If unsure, clear photos of both ends are often enough to identify the correct style.
5. Confirm Electrical Specifications
UV lamps must match the electrical requirements of the system.
- Voltage
- Wattage
- Amperage
Incorrect electrical specifications can affect performance and may damage equipment.
Additional Details That May Be Required
Quartz Type
- Clear
- Frosted
- Ruby
Reflector Style
- None
- Gold
- White
Wavelength Type
- Short wave
- Medium wave
Single Tube vs Twin Tube Lamps
Single Tube Lamps
These use one quartz tube and are common in many UV curing systems. Identification is typically straightforward using measurements and end styles.
Twin Tube Lamps
These use two parallel tubes and may require additional details such as cross-section, reflector design, and physical configuration.
Photos and accurate measurements are especially important for twin tube identification.
Download the UV Lamp Identification Form
For unknown lamps, a structured form can help organize the required details.
Download the UV Lamp Identification Form
What to Provide for Accurate Identification
- Full lamp photo
- Close-up photos of both ends
- Any visible markings
- Total length
- Arc length
- Quartz diameter
- Machine make and model
- Electrical specifications (if known)
Summary
Even without a part number, most UV lamps can be identified using a combination of system information, physical measurements, and connection details.
Accurate identification ensures proper fit, consistent curing performance, and reliable operation.