90NB

Neon-filled Geiger-Müller radiation counter for beta and gamma detection. It operates around 900 V and provides a long counting plateau for stable pulse-counting measurements.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: 3PIN
Socket code: -
Base pins: 3
Nominal heater: -

Description

Neon-filled Geiger-Müller radiation counter tube for beta and gamma detection, with a 900 V operating point and long counting plateau.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: 3PIN
Socket code: -
Base pins: 3
Nominal heater voltage: -
Nominal heater current: -
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

3PIN - Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

1 physical section, each with unique specifications.

Section 1

GeigerMullerCounter

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Promoted from source fields where the locked schema has a direct semantic match; remaining RF, rectifier, capacitance, thermal, and radiation-counter data are retained in TUBE_SECTION_PARAMETER.

Source-dependent data

Operating conditions by source

Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.

Data set 01

1958 Amperex Industrial

Published operating points and test conditions from this source.

SECTION 1

GeigerMullerCounter

Construction

Gas filling
Neon plus quenching admixture
RadiationCounter
Cathode material
Stainless steel
RadiationCounter

Other

Operating voltage
900 V DC
GeigerMuellerCounter
Operating temperature minimum
-55 °C
RadiationCounter
Operating temperature maximum
75 °C
RadiationCounter
Average wall thickness minimum
30 mg/cm²
RadiationCounter
Average wall thickness maximum
40 mg/cm²
RadiationCounter
Cathode length
3 in
RadiationCounter
Cathode outside diameter
0.625 in
RadiationCounter
Maximum overall outside diameter
0.625 in
RadiationCounter
Maximum overall length
5.625 in
RadiationCounter
Radiation application
Beta and Gamma
RadiationCounter

Characteristic

Plateau length minimum
200 V
GeigerMuellerCounter
Plateau slope maximum
10 % per 100 V
GeigerMuellerCounter
Dead time approximately
100 µs
GeigerMuellerCounter
Shielded background maximum
50 counts/min
2InchLeadShield