In scientific research experiments such as fluorescence spectroscopy, photocatalysis, photoelectrochemistry, bioluminescence, and material photoluminescence characterization, the collection of weak light signals has always been a key factor limiting the quality of experimental data. Many researchers often encounter such problems: weak fluorescence signals are drowned in electromagnetic noise, with a poor signal-to-noise ratio; external magnetic fields and stray light cause significant interference, and the data from multiple parallel tests are discrete; the detector has poor compatibility, and the combination and debugging with monochromators and spectral systems are cumbersome, consuming a lot of research time.

When the signal is as weak as nanowatts, ordinary photodetectors are unable to distinguish effective photons. Photomultiplier tubes (PMTs) then become the core choice for weak light detection. The Sefan Optoelectronics 7ID101 series photomultiplier tube detectors are specifically designed for precise spectral measurements in laboratories, and are the "golden eyes" for capturing micro-light in domestic research optical paths. Beijing Sefan Optics... 。

7ID101 adopts a side-window receiving structure and is equipped with a triple shielding design of electricity, magnetism and light. It effectively suppresses external electromagnetic interference and stray light leakage at the source, significantly reduces noise base, and effectively improves signal purity. Even extremely weak fluorescence and luminescence signals can be stably collected, reducing data drift caused by environmental interference. Inside the tube, there is an E678-11A dedicated tube holder, pre-welded with high-precision voltage divider resistors, which can flexibly adapt to more than ten mainstream PMT tube types such as CR131, 1P28, R212, R105, etc. The photocathode can be replaced as needed, covering the detection requirements of deep ultraviolet, visible light to near-infrared bands, and adapting to various spectral experiments. Beijing Saifan Light... 。

Based on the ultra-high electron multiplication characteristic of the photomultiplier tube, the detector can achieve a signal gain of 10⁶ to 10⁷, possessing single-photon-level detection capability. It is highly sensitive to low-intensity signals such as photocatalytic luminescence, fluorescence emission, and chemiluminescence. The entire system is equipped with standard BNC signal output interfaces and dedicated high-voltage BNC high-voltage input interfaces, ensuring stable signal transmission. When working in conjunction with the Sefan 7IP series high-voltage stabilizing power supply, the high-voltage output is stable, with small gain fluctuations, and there is no signal drift even during long-term continuous collection. The parallel experiments have better repeatability, providing reliable support for the data in the research paper. Beijing Sefan Light... 。

The equipment has a compact and lightweight structure, and is easy to install and debug. It can seamlessly connect with optical components such as Sifan monochromators, spectrometers, sample chambers, and filter wheel, quickly building a complete spectral testing system. It is widely used in universities, research institutes, and enterprise R&D centers, applicable to fluorescence spectroscopy testing, photocatalytic luminescence detection, photoelectric effect characterization, biochemical luminescence analysis, and trace substance spectral detection, etc.

The selection of domestic research instruments takes into account performance, delivery, and cost. The Sifan Optoelectronics 7ID101 series PMT detector eliminates the need for complex customization and debugging. With a stable and highly sensitive micro-light detection capability, it helps researchers overcome noise interference and accurately capture every weak photon, facilitating the efficient advancement of photochemistry, materials, and biological spectroscopy research.