Gravity Geiger Counter Measurement Device for Ionized Radiation

This Gravity module from DFRobot counts ionising radiation with the M4011 Geiger-Müller tube. Each event generates a pulse at the digital output, a buzzer makes the count rate audible. From the pulses per minute (CPM) the library calculates the dose rate in µSv/h. The tube responds to alpha, beta and gamma radiation, hard beta and gamma radiation can be measured quantitatively. The module works with 3.3 V and 5 V boards such as Arduino or ESP32.

Caution: The tube is operated with up to 400 V. After switching on, do not touch the high voltage section near the positive pole of the tube. The tube is fragile.

Important: The module is not a professional measuring instrument and is only intended for experiments and teaching, not for dose measurements on which personal safety depends. It does not detect electromagnetic radiation such as from microwave ovens, mobile phones or Wi-Fi. Direct sunlight on the tube can increase the readings.

Note: The connection cable can be converted to male pins with a Dupont cable M-M, so that it also fits an Arduino UNO.

Recommended Accessories:

• Dupont Cables M-M 10cm 20 Pieces

Features:

• M4011 Geiger-Müller tube
• Digital output, one pulse per event
• Buzzer with switch for acoustic feedback
• Conversion to µSv/h with the library
• Gravity 3-pin connector, 3.3 V and 5 V
• Can also be used as a random number generator

Application Examples:

• Measuring natural background radiation
• Checking rocks, minerals and building materials
• Physics lessons and experiments
• Generating true random numbers

Documentation:

• Wiki DFRobot
• Arduino library (GitHub)

Technical Data:

• Manufacturer: DFRobot
• Manufacturer SKU: SEN0463
• Tube: M4011, diameter 10 mm, length 88 mm
• Supply: 3.3 V to 5 V
• Output: digital, LOW with each pulse
• Voltage at the tube: about 400 V (working range 380 V to 450 V)
• Measuring range: up to 1200 µSv/h (theoretical value)
• Background count: about 25 CPM
• Conversion: 153.8 CPM per µSv/h
• Connections: - (GND), + (VCC), D (signal), switch for the buzzer
• Dimensions: 107 × 42 × 22 mm
• Weight: 71.5 g

Scope of Delivery:

• 1× Gravity Geiger counter module with tube
• 1× Gravity sensor cable 3-pin