Detector of radioactive particles GGreg20_V3 with a tube Geiger SBM-20

720грн.800грн.

The radioactive particle detector is an electronic sensor module for building a personal counter of ionizing radiation level. For this purpose, the detector includes the output of counting the pulses to the main controller. Arduino, Adafruit, ESP8266, ESP32 and others can be used as a host controller.

The radiation level is indicated by light and sound signals. The user can mute the sounds (jumper J1 – buzzer on / off).

GGreg20_V3 – a cheap and useful device for checking the “purity”:

  • mushrooms,
  • berries,
  • vegetables,
  • firewood, etc.

This module is useful for building smart gauges to measure the power of ionizing radiation in a manual / pocket design or in a stationary mode for both indoor and outdoor use.

 

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Description

Detector of radioactive particles (ionizing radiation) GGreg20_V3 – a ready-to-use device of IoT-devices of the new generation with a Geiger tube SBM-20 and the output of counting pulses on the controller.

Appointment

The radioactive particle detector is an electronic sensor module for building a personal counter of ionizing radiation level. For this purpose, the detector includes the output of counting the pulses to the main controller. Arduino, Adafruit, ESP8266, ESP32 and others can be used as a host controller.

The radiation level is indicated by light and sound signals. The user can mute the sounds (jumper J1 – buzzer on / off).

GGreg20_V3 – a cheap and useful device for checking the “purity”:

  • mushrooms,
  • berries,
  • vegetables,
  • firewood, etc.

This module is useful for building smart gauges to measure the power of ionizing radiation in a manual / pocket design or in a stationary mode for both indoor and outdoor use.

All you need to start measuring the power of ionizing radiation with GGreg20 is any microcontroller that can count the number of pulses per unit time on the GPIO.

Specifications

  1. The dimensions of the module are 30 x 126 x 12 mm. Weight 30 g.
  2. Nutrition:

  • from the accumulator or the usual battery:
    • 1-cell Li-Ion 3.7V battery;
    • 2-cell Ni 2.4V battery;
    • A 3-cell 4.5V battery is connected to the “Bat” port.
  • from AC / DC 5V adapter.

  1. The SBM-20 tube power supply is a built-in adjustable high-voltage DC converter. The target voltage level of 400 V is regulated by a potentiometer. The module comes with finely configured parameters and is ready for use.
  2. Current consumption – 18 mA at 5V, or 30 mA at 3.7V through Li-Ion.
  3. GGreg20_v3 is compatible with logic signal levels (3V3 ACTIVE-LOW: 3 to 3.3 V in the HIGH state and about 0.7 V in the LOW state) ESP8266 / ESP32, and will work even with a 5 V logic input.

Dimensions and purpose of foams

The purpose of the GGreg20_V3 module contacts is as follows:

  • BAT – Power supply input 2.2 V – 5.5 V;
  • ON. / OFF. – switching on / off the main switch;
  • OUT – pulse output, active-low;
  • BUZ – Buzzer toggle switch.

The dimensions of the GGreg20_V3 module are as follows:

  • X: 126 mm;
  • Y: 30 mm;
  • Z: 12 mm.

GEIGER_V3 schema

Differences and compatibility with previous versions of GGreg20

Characteristic GGreg20_V3 (new version) GGreg20_V1 Improvement status
Design monomodular two-module improved
Calculation formula unchanged
Compatibility of design and sizes The same, except for the location of the power switch mostly without changes
Stability of detection results with battery discharge In the range of 2.4 V – 5.5 V (see note 2 and note 3 ) Only at 5V supply voltage (μUSB input) improved
Measurement accuracy 20% 20% unchanged
Power supply voltage range 2.2 – 5.5 volts (see note 2 and note 3 ) 3.7 – 5.5 volts improved
Current consumption about 30 mA about 30 mA unchanged
Autonomous power supply 1 cell Li (3.7V) or 2 cell Ni (2.4V) battery or 3V battery or 2.4V – 5.5V AC / DC adapter (see note 2 and note 3 ) 1 cell Li (3.7V) or 3 cell Ni (3.6V) battery or 3 cell battery (4.5V) or AC / DC (5V) adapter improved
User interfaces LED, buzzer, pulse output connector LED, buzzer, pulse output connector unchanged
The complexity of integration into the device Two connectors and one jumper (6 pins in total) Three connectors and a jumper (11 pins together) simplified
Protection against false connection Key connectors applied and Schottky diode installed (see note 2 and note 3 ) no improved

Note 1 The GGreg20_V2 version was not included in the comparison because it was designed for other design solutions (and does not provide space for the SBM-20 on the module board).

Note 2 By default, the module board has a protection diode against incorrect reversal of the poles when connecting the battery. Such protection will be appropriate, although it does not significantly narrow the voltage range of the input power supply. With a protection diode, the input voltage range is 3 – 5.5 volts.

Note 3If you want to power the GGreg20_V3 from a 2.4 volt source, you need to short the Schottky diode shown in the photo with a wire or replace it with a 0 ohm resistor. Note, however, that this correction will disable the module’s power supply polarity reverse protection.

Switching on and measuring

This module is ready to use. The GGreg20_V3 modules are adjusted, configured and tested for compliance with the declared technical data before being shipped. Any adjustments or settings made by the customer may damage the module or introduce technical inconsistencies. Customer’s performance of any adjustments or adjustments may damage the module or cause technical inconsistencies.

Connect the input power from the selected power supply.

Turn on the power supply and after 10-15 seconds you will hear a sound and see light signals when the active particles enter the tube.

With a normal background radiation level, the tube registers and generates 20-30 pulses per minute. The number of pulses can vary depending on the weather or cosmic radiation.

Consider the average number of signals per minute.

If you receive more than 60 signals per minute, be careful. Your detector “sensed” dangerous levels of ionizing radiation from the environment or food, mushrooms, wood, etc.

Without going into detail, the formula is simple: you need to accumulate the number of input pulses on the GPIO controller per minute, and then multiply their values by a factor. Like this:

microsieverts per hour = (pulses per minute) * 0.0092

where 0.0092 coefficient is obtained from the documentation of the tube manufacturer.

According to the documentation on SBM-20, the tubes may differ (within + -20%) from each other, so we recommend applying a conversion factor from 0.0054 to 0.0092 and also calibrate your device relative to another, certified device.

Product kits for radioactive particle detector GGreg20_V3

1. GGreg20_V3 basic

  1. Module GGreg20_V3 — 1 pc
  2. SBM-20 tube — 1 pc

2. GGreg20_V3 basic + Connectors (installed) and cables

  1. Module GGreg20_V3 — 1 pc

  1. SBM-20 tube — 1 pc

  1. Connector JST XH 2P male straight — 2 pcs mounted on the module board;

  1. Pulse output cable, 15 cm, with connectors — 1 pc:
    1. JST XH 2P female on one side
    2. Dupont 2x1P female on the other hand

  1. Power input cable, 15 cm, with JST XH 2P female connectors — 1 pc

 

Technical description: GGreg20_V3 Datasheet ENG

 

Link

Manufacturer’s website https://iot-devices.com.ua
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Manufacturer message

Dear Reader! Thank you for your interest in our products. We hope you enjoy our device as well. “IoT-devices” was born thanks to the support of our customers and thanks to our experience and love for Electronics.

Developed and manufactured by IoT-devices with freedom and wisdom in Ukraine in 2021. All rights reserved.