ILT5000, SPM068-1/QNDS3/R PMT-Based Low Light UV-VIS Broad Band Radiance Measurements

PMT based radiance measurement system for low light level applications

ILT5000 Radiometer, SPM068-1/QNDS3/R Detector

Part Number: ILT5000 Radiometer, SPM068-1/QNDS3/R Detector

PMT-Based Low Light UV-VIS Broad Band Radiance Measurement System

  • Over 10 Decades 100 fA - 1 mA Measurement Range 
        (1 n/Wcm2 to 10 W/cm2)
  • Auto-Ranging
  • Built-in Wi-Fi
  • Operating Temperature: -40 to 85° C
        (Calibrated Irradiance: 0-50° C)
  • USB: USB2, Including Power, for Single and Multiple Systems
  • USB Current Draw: 500 mA max., 250 mA typical
  • Size: 1-3/5" H x 5" W x 7" L
  • Input Connector: D-Sub and SMA
  • CE Certified: No rf noise
  • Calibration: NIST Traceable/ISO 17025
  • DataLight III for Mac OS and Windows 7, 8 & 10
  • Made in the USA
  • Custom & OEM Inquiries Welcome

< Back to Low Light Level Measurement Table 

With the ILT5000, it's all about supplying fast, reliable data to your computer for analysis. Our extensive DataLight III light measurement software is available for Windows 7, 8 & 10 and MAC OS X.

The Meters App allows transmission of measurement data via USB or wirelessly. Additional features include single/multi-system graphical display, single reading capture and data recording, auto ranging, zero, hold and integrate.


SPM R Detector

SPM068-1/QNDS3/R This photomultiplier detector with built-in power supply is fitted with our narrow field of view optic allowing geometrically accurate radiance measurements in very low light level applications such as bioluminescence, phosphorescence, safety marking, and photon counting. The minimum spot size at a 1-inch distance is 25.4 mm in diameter. This detector is not typically recommended for contact radance measurements due to secondary reflection characteristics. The detector comes equipped with a QNDS3 attenuator to prevent overexposure of the detector but it may be removed for ultra-sensitive light measurements. The detector has two gain modes - high and low - to vary the dynamic range to suit the measurement application. Calibrations in W/cm2/sr with and without the QNDS3 are provided.


Dynamic Range: With QNDS3: 2e-10 to 1e-3 W/cm2/sr (high gain mode) or 2e-8 to 1e-1 W/cm2/sr (low gain mode).
Without QNDS3: 2e-13 to 1e-6 W/cm2/sr (high gain mode) or 2e-11to 1e-4 W/cm2/sr (low gain mode).

(Note: Ranges are based on conservative averages. Take care not to approach noted range on the sensor calibration certificate to prevent irreparable damage to the PMT from saturation.)

Field of View: ± 0.75 °
Measurement Range: 310-780 nm
Dimensions: 167 mm x 42 mm dia.
Ordering part#(s): ILT5000, SPM068-1/QNDS3/R

Filters and input optics are removable and may be ordered separately from the detector assembly to allow filter and input optic swapping.

DataLight III Software

With the ILT5000 its all about supplying fast, reliable data to your computer for analysis. Our extensive DataLight III light measurement software is available for Windows PC, Tablet and MAC computers. DataLight III includes our set it and forget it remote internal data storage app., and an improved All-in-One meters app for control and transmission of data using a mini USB cable or wireless data transmission.

DataLight III API


Note: For simultaneous multi-sensor data logging, ILT also offers the ILT6000 Rack-Mount Radiometer System with the same specifications as the ILT5000 in a 2-10 unit, rack mountable housing.




For the latest meter specifications, data sheet, installation guide, tech notes and software, visit the ILT5000 page here.