---
product_id: 93763356
title: "Oxygen Detector by FORENSICS | UK Calibration Certificate | USB Recharge | 0-30% O2 |"
brand: "forensics detectors fd"
price: "HK$2341"
currency: HKD
in_stock: true
reviews_count: 5
category: "Forensics Detectors Fd"
url: https://www.desertcart.hk/products/93763356-oxygen-detector-by-forensics-uk-calibration-certificate-usb-recharge-0
store_origin: HK
region: Hong Kong
---

# USB rechargeable battery Tri-mode alarms: sound, light & vibration Electrochemical NANO-GAS sensor Oxygen Detector by FORENSICS | UK Calibration Certificate | USB Recharge | 0-30% O2 |

**Brand:** forensics detectors fd
**Price:** HK$2341
**Availability:** ✅ In Stock

## Summary

> 🚨 Stay ahead of the air you breathe — precision detection that never sleeps!

## Quick Answers

- **What is this?** Oxygen Detector by FORENSICS | UK Calibration Certificate | USB Recharge | 0-30% O2 | by forensics detectors fd
- **How much does it cost?** HK$2341 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/93763356-oxygen-detector-by-forensics-uk-calibration-certificate-usb-recharge-0)

## Best For

- forensics detectors fd enthusiasts

## Why This Product

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

## Key Features

- • **Built to Endure:** Water-resistant, dustproof, and explosion-proof for rugged professional use
- • **Plug & Play Power:** Convenient USB recharge means no downtime in critical moments
- • **Triple Alert System:** Customizable audio, visual, and vibration alarms keep you instantly informed
- • **Certified & Calibrated:** Comes with UK & USA calibration certificates for guaranteed reliability
- • **Precision You Can Trust:** 0.1% resolution for ultra-accurate oxygen detection from 0-30% O2

## Overview

The FORENSICS Oxygen Detector FD-90A-O2 is a professional-grade, electrochemical sensor device calibrated for 0-30% oxygen levels with 0.1% resolution. It features adjustable sound, light, and vibration alarms, is USB rechargeable, and built to withstand harsh environments with water, dust, and explosion resistance. Certified for UK & USA standards and backed by a 1-year warranty, it’s the trusted choice for safety-conscious professionals.

## Description

Product Description Oxygen Detector Forensics Detectors offers sensitive Oxygen Detectors & Analyzers. Verify oxygen (O2) purity for air quality, veterinary incubator, confined space, personal safety, displaced oxygen, nitrogen flush, tanks, silos, inert leaks, and welding. Very Easy To Use The professional OXYGEN gas detector by FORENSICS has all the advanced features and functions, made with the highest quality electrochemical sensors. EU NPL Traceable Gas Source Have the highest confidence in your gas detection accuracy. Possible only with best calibration practices to EU NPL Traceable Sources. Calibration qualified in the Forensics Detectors laboratory. Perfect for R&D, life science biotech research, personal protection, ambient air measurements, and industrial oxygen deficiency PPE. Not to be used as a continuous indoor monitor. Comes factory-calibrated. Included Belt Clip Sling Calibration Cover EU Calibration Certificate User Manual USB Charging Cable Technical Specifications

Review: The meter is a good value for cost. - This O2 meter came certified /calibrated. I performed a bump test and confirmed the accuracy of the manufacturer's calibration. The meter is easy to operate and recharge the battery. It is surprisingly durable in the field for such an inexpensive meter. We have been using it for 2 years and have had no issues.
Review: Accurate Oxygen readout - This item is accurate and easy to use. Gives Oxygen level to a tenth of a percent.

## Features

- 🚀 SENSITIVE: Oxygen (O2) gas detector with 0 - 30% and 0.1 % resolution.
- ⚛️ DETECT: Electrochemical NANO-GAS sensor. Comes CALIBRATED with signed CERTIFICATE.
- 🎆 ALARMS: Adjustable audio, visual, and vibration alarms.
- 💪 STRONG: Water-resistant, dustproof, and explosion-proof.
- 🕵️ TRUST: ** 1 Year warranty ** Test and Calibrated in EUROPE ** 100% quality guaranteed **

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07BMNRTDL |
| Alarm | LED, Buzzer & Vibration |
| Best Sellers Rank | 659,867 in DIY & Tools ( See Top 100 in DIY & Tools ) 7,181 in Electrical Tools & Testers |
| Brand | FORENSICS DETECTORS FD |
| Colour | Yellow |
| Country of Origin | China |
| Customer Reviews | 4.2 out of 5 stars 77 Reviews |
| Included Components | Gas Detector, USB Recharge Cable, Sling, User Manual, Calibration Cap and Calibration Certificate |
| Item Dimensions D x W x H | 4.3D x 5.8W x 11H centimetres |
| Item Weight | 227 g |
| Item weight | 227 g |
| Manufacturer | Forensics Detectors |
| Manufacturer Warranty Description | 1 year manufacturer. |
| Material | ABS |
| Model Number | FD-90A-O2 |
| Number of Items | 1 |
| Operating Humidity | <95%RH |
| Part Number | FD-90A-O2 |
| Power source | Battery Powered |
| Product Style | Modern |
| Product dimensions | 4.3D x 5.8W x 11H centimetres |
| Sensor Type | Electrochemical |
| Style | Modern |
| Unit Count | 1.0 count |

## Product Details

- **Alarm:** LED, Buzzer & Vibration
- **Brand:** FORENSICS DETECTORS FD
- **Colour:** Yellow
- **Item weight:** 0.5 Pounds
- **Material:** ABS
- **Operating humidity:** <95%RH
- **Power source:** Battery Powered
- **Product dimensions:** 4.3D x 5.8W x 11H centimetres
- **Sensor type:** Electrochemical
- **Style:** Modern

## Images

![Oxygen Detector by FORENSICS | UK Calibration Certificate | USB Recharge | 0-30% O2 | - Image 1](https://m.media-amazon.com/images/I/71jcV3AHBuL.jpg)
![Oxygen Detector by FORENSICS | UK Calibration Certificate | USB Recharge | 0-30% O2 | - Image 2](https://m.media-amazon.com/images/I/81eHsGNBFNL.jpg)
![Oxygen Detector by FORENSICS | UK Calibration Certificate | USB Recharge | 0-30% O2 | - Image 3](https://m.media-amazon.com/images/I/81t0GlSQymL.jpg)
![Oxygen Detector by FORENSICS | UK Calibration Certificate | USB Recharge | 0-30% O2 | - Image 4](https://m.media-amazon.com/images/I/61+1j18yezL.jpg)
![Oxygen Detector by FORENSICS | UK Calibration Certificate | USB Recharge | 0-30% O2 | - Image 5](https://m.media-amazon.com/images/I/61I4YEZrQ3L.jpg)

## Questions & Answers

**Q: Can this be used to analyze O2 in a scuba cylinder?**
A: The detector reads up to 30% O2. If your cylinder contains compressed air, then YES. If it contains enriched O2 higher then 30%, then NO.

**Q: Does this measure carbon dioxide levels as ppm?  I've read that 250-400ppm is outdoor air so how does this measure that?**
A: It measures oxygen, not carbon dioxide.

**Q: Does this come with a charger or only a usb cable?**
A: Only USB cable. If you want a charger also, we would be happy to send you one for free. (Most customers have USB chargers lying around). Please email us forensicsdetectors@gmail.com after your purchase.

**Q: What will this meter display when Oxygen concentration rises above 30%?  And can it be user calibrated?**
A: If above 30% it just reads 30%.
Yes, the user can calibrate it. It is very easy we have Youtube videos on how to do this. Thank you.

## Customer Reviews

### ⭐⭐⭐⭐⭐ The meter is a good value for cost.
*by J***Y on 8 May 2025*

This O2 meter came certified /calibrated. I performed a bump test and confirmed the accuracy of the manufacturer's calibration. The meter is easy to operate and recharge the battery. It is surprisingly durable in the field for such an inexpensive meter. We have been using it for 2 years and have had no issues.

### ⭐⭐⭐⭐⭐ Accurate Oxygen readout
*by T***. on 19 November 2024*

This item is accurate and easy to use. Gives Oxygen level to a tenth of a percent.

### ⭐⭐⭐⭐⭐ Better than I expected.
*by L***E on 1 August 2022*

Works like a champ. Build quality is actually above what I was expecting... feels quite well built and sturdy.

## Frequently Bought Together

- Oxygen Detector by Forensics | USA NIST Calibration & Certificate | Dust & Explosion Proof | USB Recharge | Sound, Light and Vibration Alarms | 0-30% O2 |
- Gas Sampling Pump by Forensics | Stainless Steel Probe | Made for Gas Detectors & Meters | Flow Rate: 0.5LPM, 500cc/min | Strong ABS | USB Recharge |

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*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-08-11*