Skip to main content
Tube Tinker — Electron Tube Database
Alternatives & variationsDownload PDF datasheet

Specialized - Radiation Counter ·GeigerMullerCounter

1850902

18509/02 miniature self-quenching Geiger-Müller counter for gamma and high-energy beta radiation. This variant provides a short dead time and compact construction for relatively high-rate radiation counting.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized
Sections
1
Base
-
Socket code
-
Base pins
-
Nominal heater
-

Description

18509/02 miniature self-quenching Geiger-Müller counter for gamma and high-energy beta radiation. The supplied Philips sheet was read in English from the multilingual English/French/German data, including operating voltage, plateau behavior, background count, timing, life, and construction data where published.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

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

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.

Gas-filled radiation-counter section; counter-specific electrical characteristics 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

1999 Philips 0-D

Published operating points and test conditions from this source.

SECTION 1

GeigerMullerCounter

Construction

  • Filling

    Neon, argon and halogen quenching agent

  • Cathode wall thickness

    80-100 mg/cm2

Capacitance

  • Interelectrode capacitance

    1 pF

Other

  • Anode resistor

    2 Mohm

  • Operating voltage minimum

    500 V

  • Operating voltage maximum

    650 V

Characteristics

  • Starting voltage minimum

    335 V

  • Starting voltage maximum

    375 V

  • Dead time maximum

    30 usec

  • Plateau slope maximum

    0.15 %/V

    Vp=500-650V

  • Shielded background maximum

    2 counts/min

    2inPb;1/8inAl

  • Expected count life minimum

    50000000000 counts