DETECTORS
Choosing the right detector could be the most important decision when specifying a spectroradiometer. From the experience gained in producing hundreds of spectral measurement systems, we have assembled a range of detectors to cover most applications. Each detector is properly housed, complete with any associated circuitry and can be mounted directly at the exit slit of any of our monochromators. The detectors below represent our standard range, but we also have working knowledge of many others, so please consult us if you do not find the detector you want.
Detector-range:
| DH-Si DC; AC; I |
250-1100nm | high quality, UV-amplified Si-photodiode, 1cm˛ active area |
| DH-GE(3)-Te DC; AC; I; |
800-1700nm | Ge-photodiode with peltier cooling element (requires CPS1), 3mm active area diameter |
| DH-InGaAs(2) DC; AC; I; |
800-1700nm | Indium Gallium Arsenid photodiode, 2mm active area diameter |
| DH-InGaAs(3) DC; AC; I; |
800-1700nm | Indium Gallium Arsenid photodiode, 3mm active area diameter |
| DH-InGaAs-Ex-Te DC; AC; I; |
800-2200nm | Indium Gallium Arsenid photodiode with extended spectral range and peltier cooling element (requires CPS1), 3mm active area diameter |
| DH-10 DC; AC; I; |
200-600nm | photomultiplier with side-window and Bialkali photocathode (requires power supply 215) |
| DH-10-Te2 DC; AC; I; |
200-600nm | comparable to DH-10, but includes peltier cooling element (requires CPS2) |
| DH-30 DC; AC; I |
200-850nm | photomultiplier with side-window and Multialkali photocatode. (requires power supply 215) |
| DH-30-Te DC; AC; I |
200-850nm | comparable to DH-30, but includes peltier cooling element (requires CPS2) |
| DH3 DC; AC; I |
200 - 850nm | photomultiplier with front window for radiometric applications with S20 photocathode and great linear dynamic range (requires power supply 215) |
| DH3(Bl) DC; AC; I; |
200-600nm | photomultiplier with front window for UV applications with Bialkali photocathode (requires power supply 215) |
| DH3-Te DC; AC; I; |
200-850nm | comparable to DH3, but includes a peltier cooling element (requires CPS2) |
| DH-PbS-Te AC; U |
1 - 3µm | lead-sulfide photodetector for IR-applications with peltier cooling element (requires power supply 215 and CPS2); 36mm˛ of active area. |
| DH-PbSe-Te AC; U |
1 - 5µm | lead-selenium photodetector with peltier cooling element; 9mm˛ of active area |
| DH-PbS/Si-Te AC; U / DC; AC; I |
250-3000nm | Dual detector with Si photodiode and Lead-Sulfide photodetector (requires power supply 215 and CPS1) |
| DH-InSb AC; I |
1.5-5.5µm | indium antimonide detector with Dewar-cooling (liquid nitrogen; 12 hour hold time); 3mm of active area diameter |
| DH-MCT AC; U |
4 - 12µm | Mercury-cadmium-tellurium-detector with dewar cooling (requires power supply 275); 2mm of active area diameter |
| DH-Py AC; U |
1 - 40µm | pyroelectric detector with KRS5 window, includes pre-amplifier and power supply module; requires power supply 217. |
DC = direct current/light operation; AC = alternating current / light operation (required for lock-in amplifiers);
I = electrical current output; U = electrical voltage output; spectral overview (gif)
CPS1/20/50
Peltier cooler controllers/power supplies
Free-standing units are mains powered.
Modular controllers require 417/217/T bin with -CP option.
| Model | Case | For use with... | e.g. |
| CPS1 | Free-standing | 1 and 2 stage peltier cooled solid state detectors | DH-PbS-Te |
| CPS1M | Module | 1 and 2 stage peltier cooled solid state detectors | DH-PbS-Te |
| CPS1M-DUAL | Module | Dual version of CPS1M | DH-PbS-Te |
| CPS20 | Free-standing | Side window PMT | DH-00-Te |
| CPS20M | Module | Side window PMT | DH-00-Te |
| CPS50 | Free-standing | End window PMT | DH-50-Te |
| CPSE | Weatherproofed | Envirobox systems | Envbox150 |
Modular controllers require 417/217/T bin with -CP option.
Filter Based Detectors
We also offer a range of filter based detectors offering “close match” spectral responses to the desired function. For example, the DH400-VL photometric detector provides high accuracy illuminance and luminance measurements.
Some of the most common detector types are listed below:
Some of the most common detector types are listed below:
| Model | Spectral Function | Wavelength range | Normal calibration |
| DH400-VL-x | Photometric | 380-780nm | lux |
| DH400-VS-x | Scotopic | 380-780nm | lux |
| DH400-XYZ | x,y,z Colorimetric | 380-780nm | (x,y), K, lux |
| DH400-UVA-x | Radiometric UV-A | 315-400nm | W/m 2 |
| DH400-UVB-x | Radiometric UV-B | 280-315nm | W/m˛ |
| DH400-UVC-x | Radiometric UV-C | 250-280nm | W/m˛ |
| DH400-UV-x | Radiometric UV | 250-400nm | W/m˛ |
| DH400-R01-x | Radiometric ‘blue’ | 400-500nm | W/m |
| DH400-R02-x | Radiometric ‘red’ | 700-800nm | W/m˛ |
| DH400-R03-x | Radiometric ‘visible’ | 400-800nm | W/m˛ |
| DH400-R04-x | Radiometric ‘near IR’ | 800-1000nm | W/m˛ |
| DH400-R05-x | Radiometric ‘vis-NIR’ | 400-1000nm | W/m˛ |
| DH400-yyy-x | Custom /user defined | within 200-1700nm | as required |
-x: Detector options such as with/without diffuser;
-yyy: Special or user defined spectral function.
The ORM400 Optical Radiation Meter is ideally suited to display the measurements from the DH400 range of detectors as well as third party current generating detectors. The ORM400 has a USB 2.0 interface and is supplied with powerful calibration features and data display functions. It includes a library of standard spectral light sources to which customers may add. This accommodates greatest accuracy and flexibility when measuring light sources with a filter based instrument.
-yyy: Special or user defined spectral function.
The ORM400 Optical Radiation Meter is ideally suited to display the measurements from the DH400 range of detectors as well as third party current generating detectors. The ORM400 has a USB 2.0 interface and is supplied with powerful calibration features and data display functions. It includes a library of standard spectral light sources to which customers may add. This accommodates greatest accuracy and flexibility when measuring light sources with a filter based instrument.


