Function and Applications

The Cobra4 Sensor-Unit Radioactivity allows the measurement of
radioactive radiation (alpha, beta and gamma) with the aid of a
Geiger-Mueller counter tube. The Sensor-Unit also supplies
the counter tube with the necessary supply voltage and is
controlled by a micro-controller.

Benefits


It can be fitted with 3 different counter tubes

Variable counter tube voltage to investigate the
characteristics of the counter tube

Integrated speaker for acoustic signal of the counted
pulses

The unit can be connected to the Cobra4 Wireless-Link, the
Cobra4 Mobile-Link, the Cobra4 Junior-Link or the Cobra4
USB-Link using a secure and reliable plug-in / lockable
connection


Equipment and technical data


Measurement mode: pulses per minute, pulses per second, pulses
absolute

Measurement ranges:
0 ... 64 000 #/s
0 ... 999 999 #/min
0 ... 64 000 #

Gate time (adjustable): 1 ... 100 s

Adjustable tube voltage (300 - 600 V, in steps of 1
V)

Maximum data rate: 1 Hz

Integrated speaker for acoustic signal of the counted
pulses

BNC-plug for connection with standard Geiger-Mueller
counters

Dimensions (mm): 110 x 63 x 35

Weight: 120 g


Necessary Accessories

Counter tubes:


GM counter 45 mm 09007-00 and shielded
cable, BNC, l=750 mm 07542-11

GM counter type A 09025-11 and shielded cable, BNC, l=750
mm 07542-11

or GM counter type B 09005-00


Measuring units:


To connect the sensor to a PC:
Cobra4 Wireless-Link (12601-00) and Cobra4 Wireless Manger
(12600-00) and Software measure Cobra4 (14550-61) for the
executing, representation and evaluation of the measurements
or Cobra4 USB-Link (12610-00) and Software measure Cobra4
(14550-61)
or Cobra4 Junior-Link (12615-00) and Software measure Cobra4
(14550-61)
to connect the sensor to a PC

For measuring without PC:
Cobra4 Mobile-Link (12620-10)


Optional Accessories


Counter tube holder, with magnet,
09201-00 for counters type A and
type B

Counter tube holder, with magnet,
09206-00 for counter 45 mm

Large scale display 07157-93 and Display-Connect set
12623-88, to use the Cobra4 Mobile-Link for demonstration
experiments