N1012 Photomultiplier Tube Alternative Evaluation for R928, CR131 and CR114
N1012 photomultiplier tubes (PMTs) are intended for low-light detection in industrial instruments, scientific measurement and medical equipment. N1012 can be evaluated as an alternative to R928, CR131 and CR114.
Before replacement, compare spectral response, photocathode and window material, active area, gain at the intended supply voltage, dark current, rise time, base or socket configuration, package dimensions and operating environment.
Technical Specifications
| Specification | N1012-1 | N1012-2 | N1012-3 | Unit |
|---|---|---|---|---|
| Window material | Quartz glass | |||
| Photocathode material | Multi-alkali | |||
| Effective photocathode area | 8 x 24 | mm2 | ||
| Dynode structure | Circular | |||
| Spectral response range | 165-900 | 165-900 | 165-900 | nm |
| Supply voltage | 1250 | 1250 | 1250 | V |
| Photocathode luminous sensitivity | 140 | 250 | 80 | µA/lm |
| Anode luminous sensitivity | 140 | 250 | 150 | µA/lm |
| Anode dark current after 30 minutes | 3 | 50 | 3 | nA |
| Gain | 1 x 107 | 8 x 106 | 3.3 x 106 | |
| Rise time | 2.2 | 2.2 | 2.2 | ns |
| Transit time spread (TTS) | 1.2 | 1.2 | 1.2 | ns |
| Operating ambient temperature | -30 to +50 | -30 to +50 | -30 to +50 | °C |
| Storage temperature | -50 to +50 | -50 to +50 | -50 to +50 | °C |
Published values support preliminary selection. Confirm the applicable N1012 variant and current datasheet before design approval.
Typical Applications
- Industrial optical measurement and analytical instruments
- Spectroscopy and low-light scientific detection
- Medical and laboratory imaging equipment
- Monitoring systems requiring fast, sensitive photon detection
Replacement Compatibility Review
- Optical: compare spectral response, photocathode type, active area and required sensitivity.
- Electrical: confirm operating voltage, divider circuit, gain, dark current and signal-processing conditions.
- Mechanical: verify package dimensions, base or socket, pin connections and detector alignment.
- Validation: test a sample in the target instrument under actual operating conditions.
N1012 FAQ
Can N1012 replace R928, CR131 or CR114?
N1012 can be considered for replacement evaluations. Model names alone do not confirm interchangeability; compare the complete specifications and validate a sample before production use.
Is N1012 compatible with an existing PMT socket and divider circuit?
Compatibility depends on the original base, pin connections, voltage-divider circuit, supply voltage and mechanical envelope. These items should be reviewed for each instrument.
Which parameters should be supplied for an engineering review?
Provide the original tube model and datasheet, target wavelength, required gain and sensitivity, operating voltage, socket or base information, package drawing and expected quantity.