AccuMAX XR-1000 Unit + XS-555/L Luminance Sensor

AccuMAX XR-1000 Unit + XS-555/L Luminance Sensor

Luminance Sensor with Three Units of Measurement: Candelas per Square Meter (cd/m2), Candelas per Square Foot (cd/ft2) and Footlamberts (fL)

Previously a Spectroline / Spectronics Product


The perfect accessory for the AccuMAX Series meter and ideal for technicians performing radiographic examinations. The AccuMAX XS-555/L luminance sensor detector measures the brightness of a visible light source and, unlike many competitive units, allows the user the choice of displaying the results in three distinct units of measure: candelas per square meter (cd/m2), candelas per square foot (cd/ft2) and footlamberts (fL).

Note that items are purchased a la carte. Minimum requirement is the XR-1000 Readout Unit + XS-555/L Luminance Sensor. All other items are optional.



  • Meets ASTM and MIL standards.
  • Extremely versatile. Provides luminance measurements in cd/m2, cd/ft2 and fL.
  • Ideal for radiographic examinations requiring film viewer output measurements.
  • Connects easily to the digital readout unit via a USB cable.
  • Large, easy-to-read LCD screen
  • Sealed sensor housing and USB connection with water-resistant adapter. Provides superior protection against moisture contamination, shock and humidity.
  • Easy to use, simple operation including autozeroing
  • The XRP-3000 is compact, lightweight and battery-operated for convenient use in the factory, field or any other location where measurements need to be taken
  • User-selectable, multilingual display settings. Choose from English, French, German, and Spanish


Sensor Guard Upgrade

Spectro-UV now offer an optional Sensor Guard into the XS-555/L Luminance Sensor Detector. This Sensor upgrade is perfect for technicians using the XS-555/L for testing of Computed Radiography (CR) Monitors In Accordance With ASTM-E-2033-17 Paragraph 6.1.8. The upgrade enhances the performance of the sensor while taking monitor readings.

The inclusion of the Sensor Guard provides key advantages:

  • Enhanced Performance: The Sensor Guard provides for even more accurate and reliable readings ensuring optimal performance. The Sensor Guard provides for a tighter seal against ambient light. Decreased ambient light reduces the variability of readings, especially relative to the low contrast resolution readings.
  • Surface Protection: The Sensor Guard acts as a softer interface between the sensor and the monitor and reduces the likelihood of scratching.

Available July 1st, 2023

Technical Specifications

AccuMAX XR-1000 Unit Specifications

AccuMAX XR-1000 Unit Specifications
Resolution 4-Digit auto-ranging display, 128x64 dot pixel chip on glass transmissive monochrome LCD - 2.8in (7.1cm) diagonal. Backlight illuminated
Read Update 2 Hz
Overall Accuracy Better than ±5% with reference to NIST standards
Temperature Coefficient ±0.025%/°C (0 to 50°C)
Power Requirements Battery Operation: Two non-rechargeable 9V alkaline battery cells included
Dimensions (LxWxH) 7.75 x 4.25 x 1.25" (19.7 x 10.8 x 3.2 cm)
Weight 0.8 lb (360 g)
XS-555/L Luminance Sensor Specifications

XS-555/L Luminance Sensor Specifications
Luminance Range

0-1,000,000 cd/m2

0-90,000 cd/ft2

0-285,000 fL

Spectral Range 460-675 nm
Dimensions (LxWxH) 3.0 x 2.1 x 3.2" (7.6 x 5.3 x 8.1 cm)
Weight 6.4 oz (181g)

Note: There is a $25 small order fee for orders valued less than $425

Description Part # Saved Price Select Option Add to
Spectro-UV XR-1000 AccuMAX Digital Readout Unit with XCB-50 USB Connector Cable and Calibration Certificate UV-SP-XR-1000 $980.00
Spectro-UV XS-555/L Includes: AccuMAX Visible Luminance Sensor Detector, 555nm and Calibration Certificate UV-SP-XS-555/L $572.00
Spectro-UV USB Connector Cable for AccuMAX Luminance Sensor Detector UV-SP-XCB-50 $19.00
Spectro-UV Water-Resistant USB Connector Cable with Adapter (5 ft/1.5 m) for AccuMAX Luminance Sensor Detector UV-SP-XCB-100 $58.00
Spectro-UV Padded Carrying Case for AccuMAX Luminance Sensor Detector UV-SP-XCC-100 $72.00
Spectro-UV Rubber Boot for AccuMAX Digital Readout Unit UV-SP-XRB-100 $21.00