---
product_id: 91493820
title: "USA NIST Calibrated 4 Gas Monitor by Forensics | O2, CO, H2S, LEL | USB Recharge |"
brand: "forensics detectors fd"
price: "1615.36 DT"
currency: TND
in_stock: true
reviews_count: 8
url: https://www.desertcart.tn/products/91493820-usa-nist-calibrated-4-gas-monitor-by-forensics-o2-co
store_origin: TN
region: Tunisia
---

# 6-hour rechargeable lithium-ion battery via USB Response time under 30 seconds for rapid detection 4 electrochemical sensors calibrated to USA NIST standards USA NIST Calibrated 4 Gas Monitor by Forensics | O2, CO, H2S, LEL | USB Recharge |

**Brand:** forensics detectors fd
**Price:** 1615.36 DT
**Availability:** ✅ In Stock

## Summary

> ⚡ Stay ahead of danger with precision you can count on!

## Quick Answers

- **What is this?** USA NIST Calibrated 4 Gas Monitor by Forensics | O2, CO, H2S, LEL | USB Recharge | by forensics detectors fd
- **How much does it cost?** 1615.36 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/91493820-usa-nist-calibrated-4-gas-monitor-by-forensics-o2-co)

## 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

- • **Rugged & Ready:** Waterproof, dust-proof, and explosion-proof ABS housing with anti-slip grip built for the toughest environments.
- • **Plug & Play Power:** USB rechargeable lithium-ion battery delivers up to 6 hours of continuous monitoring—no downtime, no hassle.
- • **Instant Safety Alerts:** Customizable audio, visual, and vibration alarms with digital time stamps keep you instantly informed and compliant.
- • **Precision You Can Trust:** USA NIST traceable calibration ensures industry-leading accuracy for O2, CO, H2S, and LEL detection.
- • **Certified Quality Assurance:** Comes with a calibration certificate, 1-year limited warranty, and 100% USA product testing for peace of mind.

## Overview

The USA NIST Calibrated 4 Gas Monitor by Forensics is a professional-grade digital gas detector featuring four high-quality electrochemical sensors for Oxygen, Carbon Monoxide, Hydrogen Sulfide, and Combustibles (LEL). It offers rapid detection with less than 30 seconds response time, customizable multi-mode alarms, and a rugged, waterproof design. Powered by a USB rechargeable lithium-ion battery with 6 hours of life, it ensures reliable, on-the-go safety monitoring backed by USA calibration certification and a 1-year warranty.

## Description

USA NIST Calibrated 4 Gas Monitor by Forensics | O2, CO, H2S, LEL | USB Recharge |

## Features

- ⚛️ SENSOR: High quality electrochemical sensors. USA NIST traceable calibration. Oxygen (O2), Carbon Monoxide (CO), Hydrogen Sulfide (H2S) and Combustibles (LEL). Turn ON and GO.
- 🌇 DETECT: Detection error better than ≤±5% F.S. and response time: < 30 sec. Zero and span calibration options.
- 🎆 ALARMS: Adjustable audio, visual, and vibration alarms alert when preset levels are reached. Alarm digital time stamp.
- 💪 STRONG: Robust design made of high strength ABS and Anti-slip grip rubber. Waterproof, dust-proof and explosion-proof.
- 🕵️ TRUST: ** 1 year limited warranty ** Arrives with calibration and QA certificate ** 100% product test and verification in the USA ** 100% quality guaranteed **

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | FORENSICS DETECTORS FD |
| Style | Digital |
| Power Source | Battery Powered |
| Color | Black, Yellow |
| Product Dimensions | 1.18"D x 2.64"W x 5.12"H |
| Item Weight | 0.6 Pounds |
| Alarm | Audible, Vibration, Visual |
| Operating Humidity | 95 percent |
| Sensor Type | Electrochemical |
| Manufacturer | FORENSICS |
| Part Number | AQ-ODP5-281U |
| Item Weight | 9.6 ounces |
| Item model number | AQ-ODP5-281U |
| Batteries | 1 Lithium Ion batteries required. (included) |
| Is Discontinued By Manufacturer | No |
| Voltage | 5 Volts (DC) |
| Batteries Included? | Yes |
| Batteries Required? | Yes |
| Battery Cell Type | Lithium Ion |
| Average Battery Life | 6 Hours |

## Product Details

- **Brand:** FORENSICS DETECTORS FD
- **Style:** Digital
- **Power Source:** Battery Powered
- **Color:** Black, Yellow
- **Product Dimensions:** 1.18"D x 2.64"W x 5.12"H
- **Item Weight:** 0.6 Pounds
- **Alarm:** Audible, Vibration, Visual
- **Operating Humidity:** 95 percent
- **Sensor Type:** Electrochemical
- **Manufacturer:** FORENSICS

## Images

![USA NIST Calibrated 4 Gas Monitor by Forensics | O2, CO, H2S, LEL | USB Recharge | - Image 1](https://m.media-amazon.com/images/I/615YDnPc4+L.jpg)

## Questions & Answers

**Q: Will this device detect ethanol?**
A: It will respond to ethanol vapor, but will not be very representative of the actual %LEL since this detector, like all, are calibrated standard to methane. If you need %LEL for ethanol we will need to special order for accurate ethanol %LEL. Thank you.

**Q: Does this unit have a belt clip or some other means with which to attach it to an individual?**
A: Yes come with an aligator belt clip.

**Q: Do you have any device that we can analyze the CO gas from vehicle**
A: No unfortunately we do not. Existing products from other companies seem to be OK options.

**Q: Conflicting info for battery life. "working battery time	> 24 hours" or "average battery life	‎6 hours". which is it? thanks!**
A: Thanks for bringing it to our attention. Battery life is well over 24 hours!
We will fix the Amazon-generated typo. Have a great day.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Customer service came through!
*by A***Y on February 1, 2023*

My original review is below. The first unit I received had a bad 02 sensor. Sarah reached out to me and within a few days I received a replacement unit. No issue with the replacement, customer service was willing to help and now everything is all good. Thanks Sarah and all at Forensics Detectors. I am sure that I will be purchasing other equipment in the future.I have no idea if this device is easy to use or not. Value for the money certainly does not seem to be there, and accuracy gets a 0% from me right now. The unit I received went into alarm mode when turned on for the first time and will not reset or clear. Display indicates 02 level at 0.0%, which I have to assume indicates a sensor failure or some issue with the equipment. I have sent emails, but so far I have received NO response at all. I understand that equipment fails sometimes, but with 0 time on the equipment? I am not sure that is an acceptable time between failure. Hopefully this company will reply within the next couple of days and this can be resolved.Update on this issue. Customer Support contacted me and is shipping a new unit to me, I will advise further when new item is received.

### ⭐⭐⭐⭐⭐ Did what it was supposed to do.
*by R***Y on September 4, 2025*

Back then, when purchased, it worked as advertised. In Mexico, we never got sick in an old mine shaft. Luckily, we're still okay.

### ⭐⭐⭐⭐⭐ Great quality
*by R***Z on September 16, 2025*

Great value. It works great and has great factory support.

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-01-25*