---
product_id: 415042578
title: "SBM-20 Geiger-Muller Tube"
brand: "mightyohm"
price: "5434288₫"
currency: VND
in_stock: true
reviews_count: 5
category: "Mighty Ohm"
url: https://www.desertcart.vn/products/415042578-sbm-20-geiger-muller-tube
store_origin: VN
region: Vietnam
---

# Precision glass tube Tested for reliability Beta & gamma sensitivity SBM-20 Geiger-Muller Tube

**Brand:** mightyohm
**Price:** 5434288₫
**Availability:** ✅ In Stock

## Summary

> ⚡ Detect the unseen. Own the future of radiation sensing.

## Quick Answers

- **What is this?** SBM-20 Geiger-Muller Tube by mightyohm
- **How much does it cost?** 5434288₫ with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/415042578-sbm-20-geiger-muller-tube)

## Best For

- mightyohm enthusiasts

## Why This Product

- Trusted mightyohm brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Quality Assured:** Each SBM-20 tube undergoes rigorous testing to guarantee peak performance and reliability.
- • **Proven Track Record:** Rated 4.8 stars with glowing reviews, a staple in the radiation detection community.
- • **Lightweight & Durable:** Crafted from precision glass, weighing just 0.02 kg, perfect for portable radiation detection setups.
- • **DIY Enthusiast’s Dream:** Iconic component trusted by makers and professionals for custom Geiger counter builds.
- • **Radiation Detection Mastery:** Highly sensitive to both beta and gamma radiation for accurate environmental monitoring.

## Overview

The SBM-20 Geiger-Muller Tube is a precision glass sensor highly sensitive to beta and gamma radiation, widely used in DIY and professional Geiger counters. Each unit is individually tested to ensure reliability, making it a trusted choice for accurate radiation detection in compact, lightweight form.

## Description

This is the iconic SBM-20 Geiger-Muller Tube used in many DIY Geiger Counter projects. This tube is sensitive to beta and gamma radiation. Each tube is tested and carefully packaged.

Review: Great Muon detector
Review: Installed into my GMC-300S Geiger Counter

## Features

- New old stock.
- Sensitive to beta and gamma radiation.
- Each tube is tested.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08MJ2Z3H3 |
| Best Sellers Rank | #427,359 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #411 in Tube Lights & Battens |
| Brand | MightyOhm |
| Brand Name | MightyOhm |
| Colour | Clear |
| Customer Reviews | 4.8 out of 5 stars 25 Reviews |
| Item Type Name | tube |
| Item Weight | 0.02 Kilograms |
| Manufacturer | 0 |
| Material | Glass |
| Material Type | Glass |
| UPC | 860005573226 |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** MightyOhm
- **Colour:** Clear
- **Item Weight:** 0.02 Kilograms
- **Manufacturer:** 0
- **Material:** Glass
- **Specific Uses For Product:** Radiation detection in nuclear facilities, research labs, and emergency response situations
- **UPC:** 860005573226

## Images

![SBM-20 Geiger-Muller Tube - Image 1](https://m.media-amazon.com/images/I/61RV+w-BMgL.jpg)
![SBM-20 Geiger-Muller Tube - Image 2](https://m.media-amazon.com/images/I/41I5-V23ilL.jpg)
![SBM-20 Geiger-Muller Tube - Image 3](https://m.media-amazon.com/images/I/51HpawiBL1L.jpg)

## Questions & Answers

**Q: Does the data sheet come in English?**
A: Hahahaha....no.  It doesn't come with a data sheet at all.  That being said, a little research into the nature of the device(s) will yield suitable guesstimates.  These are low current, fairly low (280 - 350) volt tubes and they're SLOW, so don't expect to get good science out of them.  Wikipedia has a little bit of data on them, and a few trial runs with cheap isolation type electronics can give you some solid state circuitry, but they're really designed for the vacuum tube era and mate perfectly with old triodes.  Don't try juicing it up, look at the operating curve for the reason why.  Good luck to you, they're interesting tech toys.  You DO need a really clean DC supply and adequate shielding for the counter, otherwise you'll be swamped with noise.

**Q: If the tube is sensitive to gamma radiation, will it also work for X-rays as well?**
A: Yes, the tube will detect x-rays, however there are no specifications for x-ray sensitivity so performance is not guaranteed. I will say that other customers are using it to detect x-rays and have been satisfied by the performance.

**Q: How do you properly pack/store this device in your luggage? Will anything happen to it if it passes through an X-ray machine?**
A: This should not be a problem. The biggest risk is shock or crush damage. Make sure to protect the tube from being accidentally dented or crushed, as the tubes are very fragile! I recommend a sturdy box or plastic enclosure to protect the tube, and sufficient bubble wrap to keep the tube from rattling around inside the box.
As an aside, these tubes can be used to detect x-rays, but I do not recommend attempting to this in an airport security line.
You can see the kit being used to detect x-rays in several Applied Science videos, including this one:
https://www.youtube.com/watch?v=H7ldYhzKAp4&ab_channel=AppliedScience

**Q: Is this device tsa approved? i am planning on traveling to ecuador but i am concerned if the tsa will not allow me to take this on a plane.**
A: I'm not aware of a TSA regulation that specifically pertains to Geiger counter tubes. 
However, Geiger Counters are specifically allowed: 
https://www.tsa.gov/travel/security-screening/whatcanibring/items/geiger-counters

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great Muon detector
*by T***M on 29 October 2025*



### ⭐⭐⭐⭐⭐ Installed into my GMC-300S Geiger Counter
*by D***X on 22 April 2024*



### ⭐⭐⭐⭐⭐ Muon Counter
*by M***T on 7 July 2023*



## Frequently Bought Together

- MightyOhm SBM-20 Geiger-Muller Tube
- MightyOhm Geiger Counter Kit Bundle
- Shkalacar Assembled DIY Geiger Counter Kit, DIY Nuclear Radiation Detector Kit with Miller Tube, Portable Geiger Counter, Assembled Radiation Detector System Experimental Module

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*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-03-23*