---
product_id: 160963663
title: "RD1503 Dosimeter (Outdoor Version) High accuracy geiger counter, nuclear radiation detector"
brand: "radex"
price: "KSh134515"
currency: KES
in_stock: true
reviews_count: 4
category: "Radex"
url: https://www.desertcart.co.ke/products/160963663-rd1503-dosimeter-outdoor-version-high-accuracy-geiger-counter-nuclear-radiation
store_origin: KE
region: Kenya
---

# Detects Beta, Gamma & X-Ray radiation Multi-mode alert: audio, vibration & backlight Fast response: 40s low, immediate high alert RD1503 Dosimeter (Outdoor Version) High accuracy geiger counter, nuclear radiation detector

**Brand:** radex
**Price:** KSh134515
**Availability:** ✅ In Stock

## Summary

> ☢️ Stay safe, stay savvy — detect the invisible before it detects you!

## Quick Answers

- **What is this?** RD1503 Dosimeter (Outdoor Version) High accuracy geiger counter, nuclear radiation detector by radex
- **How much does it cost?** KSh134515 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.ke](https://www.desertcart.co.ke/products/160963663-rd1503-dosimeter-outdoor-version-high-accuracy-geiger-counter-nuclear-radiation)

## Best For

- radex enthusiasts

## Why This Product

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

## Key Features

- • **Rapid Alert System:** Instant high-level warnings plus quick 40-second low-level updates keep you informed in real-time.
- • **Multi-Sensory Alarms:** Audio, vibration, and backlight alerts ensure you never miss critical radiation spikes—even in noisy environments.
- • **Compact & Lightweight:** At just 90g and pocket-sized, it’s your discreet yet powerful radiation watchdog on the go.
- • **Pre-Calibrated Precision:** Factory-calibrated with ±15% accuracy for reliable readings right out of the box—no guesswork needed.
- • **Triple Radiation Detection:** Stay ahead with Beta, Gamma & X-Ray sensing for comprehensive safety.

## Overview

The RADEX RD1503 Outdoor Dosimeter is a high-precision Geiger counter designed to detect Beta, Gamma, and X-Ray radiation within a range of 0.05 to 9.99 µSv/h. Featuring fast response times, multi-mode alarms (audio, vibration, backlight), and pre-calibrated accuracy of ±15%, it offers reliable radiation monitoring in a compact, lightweight form factor. While marketed as an outdoor device, it requires protective casing against moisture and impact for optimal durability.

## Description

Radex RD1503 Outdoor Geiger Counter High Precision Radiation Detector Dosimeter

Review: Peace of mind - I can never understand why radiation detectors are not more popular. I find that having something that can measure an invisible killer is a great thing. I did lot of research before buying this. This seemed the best one for the price. The next step up would be one with a pancake device. Anyway back to this product. I keep mine in a ziplock bag to protect it from dust. It quite happily tick as long measuring everything. I enjoy seeing the background levels of radiation instantly before my eyes. Some parts of it are difficult to use ie. how to set up the background radiation etc. However once this is done you can just turn the thing on and it will give you a warning. I bought mine in bright orange so that I don't mislay it.
Review: Not waterproof at all! Not ruggedised! Only 'outdoor' thing is the colour. Works though. - Immediately after opening the package and during putting in the batteries I saw the problems with the 'outdoor' part of this product. The battery compartment is not sealed, at all, no gasket, no o-ring and you can see the PCB from the battery compartment. The battery-cover is a very basic push-in type that doesnt hinge or properly clip into place let alone is a secure screw-down type. Could easily drop or even lose the battery compartment cover if changing batteries outside. The batteries themselves also want to jump out of the connectors which might be a good anti-vibration feature except for the loose battery cover. The frist time I turned over the product to turn it on a battery had jumped out of the connector and pushed the battery cover out a ways. There is a gap in the top of the device for some component and being poorly aligned there is a 2mm gap into the case - again I can see bare PCB and into the void of the case from the hole, zero protection from water in any way whatsoever. There is no strain-relief for the LCD screen, gently pressing on the case near the screen, i.e. a firm grip, led to 'white-out' of corners of the LCD, it would not take much to damage the screen. I also see no gasket or seal for the screen, somewhere where water could pool and ingress. If you are going to use this outside, put it inside a ziplock bag - the bag shouldn't interfere with readings much as there is no alpha-detection. Didn't seem to affect the background-level when i did it. However, the device seems to work as intented, the background level was nominal and placing next to an old smoke-detector showed a small increase in levels. The software is okay. The menus are usable and readable. The alarm-level is adjustable. The backlight is useful and the amount of time it stays on is adjustable. Its easy to use and works automatically after turning on. Only downside is that the smoothed and filtered values take some time to become accurate (which is understandable in background-level areas as there are few 'hits' to calculate a rate from). It does however show you the warm-up progress to display when you have an accurate reading which is nice. Being able to alter the smoothing in software might also be useful ( trade noise for faster results / faster scanning ). Overall the device is okay although it feels 'cheap' as it seems to work as intended. I've only spent a short time with it so long-term reliability is unknown. But, if you are expecting a weather-proof 'outdoor' device, it certainly isnt it that. 3 stars becasue it works and is easy to use - but a misleading name and images: Don't get this thing wet at all, or keep it in the damp, or drop it, or hold it too tight, or lose the battery cover becasue a battery jumped out and pushed the easily removed battery-cover off.

## Features

- UPGRADE Outdoor Edition - better protected
- Combined Beta, Gamma and X-Ray radiation detection.
- Detection range of 0.05~9.99 µSv/h (Micro Sieverts per Hour) or millirems
- Audio alarm - Vibration Alarm - Backlight
- Pre-calibrated, Accurate (+/- 15%), Fast (40 second cycle if low, Immediate if high)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01M7PTJCS |
| Batteries | 2 AAA batteries required. |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 775,670 in DIY & Tools ( See Top 100 in DIY & Tools ) 2,544 in Multi Testers |
| Colour | Orange |
| Customer Reviews | 4.5 4.5 out of 5 stars (9) |
| Date First Available | 19 Oct. 2016 |
| Item Package Quantity | 1 |
| Item Weight | 90.7 g |
| Item model number | RD1503+ (Upgraded 2018) |
| Manufacturer | Quarta-Rad |
| Part number | RD1503+ Outdoor |
| Product Dimensions | 5.84 x 10.16 x 1.27 cm; 90.72 g |

## Images

![RD1503 Dosimeter (Outdoor Version) High accuracy geiger counter, nuclear radiation detector - Image 1](https://m.media-amazon.com/images/I/71sqOuDVrYL.jpg)

## Questions & Answers

**Q: Can it detect all of "alpha", "beta", and "gamma" ??**
A: The seller's wholesale dismissal of alpha radiation is irresponsible at best.  Just for a quick example both Radium-226 and it's decay product, Radon-222, decay purely by alpha radiation as do the other two naturally occurring isotopes of Radon.

While it is true it's not likely that one would use such a dosimeter/geiger counter to detect Radon, it would be used to detect Radium, which still can be found in vintage watches and older medical equipment.

**Q: Why do they show it in use near hv transformers?  does it also detect em emissions in that range?**
A: No, you would need and EMF (electromagnetic field) detector for that:
https://www.amazon.com/Advanced-Electro-Magnetic-Detector-Monitor/dp/B007ZBETWC/

EM emissions are non-ionizing radiation, which means the particles do not have enough charge to cause damage to tissue.
Geiger counters detect ionizing radiation, the dangerous kind: Alpha, Beta, Gamma, X-ray, etc.

Illustration:
https://quartarad.com/wp-content/uploads/2018/10/ionizing-radiation.jpg
https://quartarad.com/wp-content/uploads/2018/05/types-of-radiation.gif
I hope this clarifies matters a bit!

**Q: What is the difference between this model and the RD1503+ without dosimeter model?**
A: This model does have the dosimeter function (see "DOSE" on the LCD screen), which means that it can switch between immediate radiation levels ("NOW") and accumulated dosage over time ("DOSE").Very useful when working in environments with even slightly raised radiation levels (warehouses, junk yards, granite canyons, treatment plants, etc.)

**Q: Is this detector EMP proof?**
A: As a former designer of electronic circuits, I can opine with 99% certainty that it is NOT EMP proof. I say that because the outside is plastic (a non-shielding material), and the LCD screen also would not block radiation. I think to add EMP protection would raise the cost considerably!

 FYI, I store my detector, when not in use, inside a metal container (with other electronics) because of its vulnerability to EMPs.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Peace of mind
*by R***E on 15 May 2020*

I can never understand why radiation detectors are not more popular. I find that having something that can measure an invisible killer is a great thing. I did lot of research before buying this. This seemed the best one for the price. The next step up would be one with a pancake device. Anyway back to this product. I keep mine in a ziplock bag to protect it from dust. It quite happily tick as long measuring everything. I enjoy seeing the background levels of radiation instantly before my eyes. Some parts of it are difficult to use ie. how to set up the background radiation etc. However once this is done you can just turn the thing on and it will give you a warning. I bought mine in bright orange so that I don't mislay it.

### ⭐⭐⭐ Not waterproof at all! Not ruggedised! Only 'outdoor' thing is the colour. Works though.
*by M***. on 19 November 2020*

Immediately after opening the package and during putting in the batteries I saw the problems with the 'outdoor' part of this product. The battery compartment is not sealed, at all, no gasket, no o-ring and you can see the PCB from the battery compartment. The battery-cover is a very basic push-in type that doesnt hinge or properly clip into place let alone is a secure screw-down type. Could easily drop or even lose the battery compartment cover if changing batteries outside. The batteries themselves also want to jump out of the connectors which might be a good anti-vibration feature except for the loose battery cover. The frist time I turned over the product to turn it on a battery had jumped out of the connector and pushed the battery cover out a ways. There is a gap in the top of the device for some component and being poorly aligned there is a 2mm gap into the case - again I can see bare PCB and into the void of the case from the hole, zero protection from water in any way whatsoever. There is no strain-relief for the LCD screen, gently pressing on the case near the screen, i.e. a firm grip, led to 'white-out' of corners of the LCD, it would not take much to damage the screen. I also see no gasket or seal for the screen, somewhere where water could pool and ingress. If you are going to use this outside, put it inside a ziplock bag - the bag shouldn't interfere with readings much as there is no alpha-detection. Didn't seem to affect the background-level when i did it. However, the device seems to work as intented, the background level was nominal and placing next to an old smoke-detector showed a small increase in levels. The software is okay. The menus are usable and readable. The alarm-level is adjustable. The backlight is useful and the amount of time it stays on is adjustable. Its easy to use and works automatically after turning on. Only downside is that the smoothed and filtered values take some time to become accurate (which is understandable in background-level areas as there are few 'hits' to calculate a rate from). It does however show you the warm-up progress to display when you have an accurate reading which is nice. Being able to alter the smoothing in software might also be useful ( trade noise for faster results / faster scanning ). Overall the device is okay although it feels 'cheap' as it seems to work as intended. I've only spent a short time with it so long-term reliability is unknown. But, if you are expecting a weather-proof 'outdoor' device, it certainly isnt it that. 3 stars becasue it works and is easy to use - but a misleading name and images: Don't get this thing wet at all, or keep it in the damp, or drop it, or hold it too tight, or lose the battery cover becasue a battery jumped out and pushed the easily removed battery-cover off.

### ⭐⭐⭐⭐⭐ Great item
*by V***S on 10 July 2021*

Absolutely brilliant, good quality , accurate , nice features, easy to use , really pleased thku and well worth the money 💰

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*Product available on Desertcart Kenya*
*Store origin: KE*
*Last updated: 2026-02-01*