T4021 Series 2-inch Head-on Photomultiplier Tubes (PMT)

The T4021 series is a 2-inch head-on photomultiplier tube featuring a 10-stage box-and-grid focused dynode structure. With a borosilicate glass window and bialkali photocathode, it offers high gain and high collection efficiency, making it ideal for scintillation counting and radiation measurement applications.
 
Key Specifications
 
General Specifications
 
- Window Material: Borosilicate glass
- Photocathode Material: Bialkali
- Dynode Structure: Box-and-grid focused (10-stage)
- Cathode Effective Diameter: 46 mm
- Spectral Response Range: 290 – 650 nm
- Quantum Efficiency Peak Wavelength: 380 nm
- Rise Time: 7 ns
- Operating Temperature: –30°C to +50°C
- Storage Temperature: –50°C to +50°C
 
Model Comparison
 
T4021-1
 
- Cathode Luminous Sensitivity: ≥ 60 µA/lm
- Blue Sensitivity: ≥ 10 µA/lm
- Anode Luminous Sensitivity: 1500 – 2000 A/lm
- Supply Voltage: ≤ 1500 V
- Gain: 2.5 × 10⁷
- Anode Dark Current: ≤ 5 nA
 
T4021-2
 
- Cathode Luminous Sensitivity: ≥ 60 µA/lm
- Blue Sensitivity: ≥ 9 µA/lm
- Anode Luminous Sensitivity: 100 – 1250 A/lm
- Supply Voltage: ≤ 1500 V
- Gain: 1.6 × 10⁷
- Anode Dark Current: ≤ 5 nA
 
T4021-3
 
- Cathode Luminous Sensitivity: ≥ 60 µA/lm
- Blue Sensitivity: ≥ 7 µA/lm
- Anode Luminous Sensitivity: 40 – 100 A/lm
- Supply Voltage: ≤ 1500 V
- Gain: 1.6 × 10⁶
- Anode Dark Current: ≤ 100 nA
 
Features
 
- High Gain: Excellent signal amplification for low-light detection
- High Collection Efficiency: Optimized dynode structure maximizes electron collection
- Stable Performance: Reliable operation in demanding environments
 
Typical Applications
 
- Scintillation counting
- Radiation measurement
- Low-light-level detection
- Nuclear instrumentation
- Medical imaging equipment
- High energy physics research