Description
Gamma Scientific DR-2 Digital Radiometer w/ Model 2400-1H Detector & 2020-6
The Gamma Scientific DR-2 is a benchtop digital radiometer designed for precision optical radiation measurement in laboratory and industrial settings. It measures radiant flux across selectable ranges using a photomultiplier-based detector head, displaying results on a bright LED numeric readout. This listing includes the DR-2 main instrument, the Model 2400-1H photomultiplier detector (fitted with a PC-101 photomultiplier tube), and the Model 2020-6 lens adapter.
Specifications & What's Included
- Make: Gamma Scientific, Incorporated — San Diego, California, USA
- Main Instrument: DR-2 Digital Radiometer
- Detector: Model 2400-1H photomultiplier detector head
- Tube Type: PC-101 photomultiplier tube
- Lens Adapter: Model 2020-6 (Gamma Scientific)
- Display: LED digital readout (shows numeric value and exponent)
- Display Modes: CAL, HV, FLUX, AUTO
- Range: ×10², ×10³, ×10⁴, ×10⁵ selectable via front-panel switch
- Time Constant: S / M / F (Slow / Medium / Fast) rear-panel selector
- Shutter: Built-in electromechanical shutter control (ON / CLOSE front-panel switch)
- Front-panel controls: ON/SHUT/CLOSE switch, CAL and HV trim knobs, ZERO and DK CUR knobs
- Rear outputs: Dual D-sub BCD Output connectors, Analog CAL port, circular Shutter connector
- Power: 110V–1/2A or 220V–1/4A (IEC inlet, rear panel)
- Form Factor: Benchtop
- Country of Manufacture: United States
- What's Included: DR-2 main instrument, Model 2400-1H detector, Model 2020-6 lens adapter, attached cables
Applications
The Gamma Scientific DR-2 is a photomultiplier-based radiometer used for measuring low-level optical radiation — including irradiance, radiant flux, and luminance — in research, calibration, and optical testing environments. Instruments of this type were standard in optics laboratories, photometric standards labs, and semiconductor/display test setups from the 1970s through the 1990s, where accurate, repeatable light-level measurements were critical. The 2400-1H detector's PC-101 photomultiplier tube provides high sensitivity across a defined spectral range, making this system suitable for low-light flux measurements such as lamp calibration, filter characterization, and source intensity verification. The Model 2020-6 lens adapter allows attachment of standard optical accessories to the detector input aperture. Instruments of this series were produced by Gamma Scientific, a San Diego-based manufacturer specializing in photometric and radiometric measurement equipment that remains active in the field today.
This Gamma Scientific DR-2 Digital Radiometer has been pulled from a working scientific environment and has not been powered up or tested at our facility. The unit comes with the Model 2400-1H photomultiplier detector (tube type PC-101) and the Model 2020-6 lens adapter. The main instrument housing shows normal wear consistent with lab use — scuffing on the top cover and light marks on the aluminum side panels. The front panel controls, knobs, and LED display appear intact. The rear BCD output connectors and power inlet are present and undamaged. The detector head shows typical handling marks. Please review all photos carefully and contact us with any questions before purchasing.
Warranty Information
Additional Information
Brand: |
Gamma Scientific |
Model: |
DR-2 |
MPN: |
DR-2 |
Secondary Model: |
2400-1H |
SKU: |
36079 |
Type: |
Digital Radiometer |
Detector Model: |
Model 2400-1H |
Tube Type: |
PC-101 Photomultiplier |
Lens Adapter: |
Model 2020-6 |
Display Type: |
LED Digital Readout |
Power Requirements: |
110V–1/2A or 220V–1/4A |
Output: |
BCD Output, Analog CAL |
Shutter: |
Built-in electromechanical shutter |
Time Constant: |
S / M / F (Slow/Medium/Fast) selectable |
Range: |
x10², x10³, x10⁴, x10⁵ selectable |
Display Modes: |
CAL, HV, FLUX, AUTO |
Country/Region of Manufacture: |
United States |
Form Factor: |
Benchtop |
Seller Notes: |
Includes Model 2400-1H detector and Model 2020-6 lens adapter. |
Condition Notes: |
This Gamma Scientific DR-2 Digital Radiometer was pulled from a working lab and has not been tested at our facility. Includes Model 2400-1H detector (PC-101 tube) and 2020-6 lens adapter. Shows normal wear. Please contact us with any questions. |
California Prop 65 Warning: |
WARNING: This product can expose you to chemicals including lead and lead compounds, and DEHP (a phthalate), which are known to the State of California to cause cancer and birth defects or other reproductive harm. Go to P65Warnings.ca.gov |
