Availability:In stock
Get a quote
Enter your details and we will get back to you as soon as possible.

Product Features
  • Monitor carbon dioxide, Temperature and Relative Humidity
  • Use non-dispersive infra-red (NDIR) sensor for more accurate monitoring
  • Three pre-programmed activity level settings (Low/Medium/High)
  • Traffic Light Visual Indication (Green/Yellow/Red)
  • Sound Alert: one beep for medium alert; two beeps for high alert
  • Small portable size and lightweight
  • Easy-to-use one button setting
  • 10 hours battery life using Lithium-ion rechargeable battery
  • 1-year limited product warranty
  • Perfect CO2 monitor for schools
  • Bluetooth functionality
  • Configurable via Transmission Risk Air Monitor mobile app
Delivery options

At Cadmus Products we aim to deliver orders efficiently and at highly competitive rates. 

  • We can ship consignments of all shapes and sizes and hazardous content across the UK and worldwide. Most of our orders are sent via DHL, however sometimes we may use other couriers.
  • If you are purchasing a laboratory product online you can find out the price of shipping checkout. If you are obtaining a quote for a product, then we will email you
    with our best shipping prices along with your quote.
  • Please see our delivery page for full information
Honeywell Transmission Risk Air Monitor is available to buy in increments of 1
The Honeywell Transmission Risk Air Monitor is an easy-to-deploy, portable device that measures carbon dioxide and features a proprietary risk alerting system based on different activity levels within a room. This allows end-users to proactively improve indoor ventilation.

The Honeywell Transmission Risk Air Monitor (HTRAM) analyses specific air quality conditions and alerts the user when conditions are present that may increase the risk of exposure to airborne viral transmission.

The Honeywell Air Monitor is a cost-effective monitor for use in schools, restaurants, and other small-to-medium-sized buildings that alerts to the potential increase of exposure to airborne transmission risk based on CO2 and activity levels in an indoor area. It is also perfect to use if you are working from home, to make sure you have enough ventilation. 

Key Features
  • The monitor comes with a user manual and USB charging cable. AC adapter sold separately.
  • Made of alloy and plastic, the monitor’s sleek, lightweight design makes it easy to carry for real-time monitoring anywhere.
  • Red, yellow, and green indicators show at-a-glance the potential airborne transmission risk level of the air you are breathing
As the world returns to in-person activities, engaging in additional measures to help support the health of the public is vital. Classrooms, restaurants, and buildings with outdated HVAC and ventilation systems can foster environments where the risk of airborne virus transmission could increase.* Honeywell proprietary technology that monitors CO2 levels, coupled with user-controlled settings to account for human activity levels in an indoor area, provides users with a portable, cost-effective, and user-friendly solution that alerts to a potential increased risk of airborne viral transmission. Research conducted by scientists at the University of Colorado1 has shown that real-time monitoring of indoor ambient air can provide an indicator of increased risk of airborne viral transmission, utilizing different levels of risk-based factors such as CO2 concentration levels and the type of human activity in the area.

Monitor exposure for students in classrooms
to indicate transmission risk level.

Monitor airborne transmission risk levels in
restaurants to alert of higher-risk situations.

Using this guidance and Honeywell algorithms, we developed risk levels based on common activities and average variables such as room size, number of people present, breathing rate, and duration. The device comes with three pre-programmed indoor activity settings: low activity (movie theatres, libraries, and classrooms), medium activity (restaurants, offices, small clinics), and high activity (gyms, indoor arenas, recreation centres) and is recommended for coverage of 800-1000 square feet. For each setting, the monitor provides indications using a traffic light pattern (green, yellow, or red) and a sound alarm so users can be aware of the potential increase of airborne transmission risk based on detectable CO2 levels.

Device Indication

Indicator Colour Green Yellow Red
Description Lower airborne transmission risk Medium airborne transmission risk Higher airborne transmission risk
Recommended Action - - Open windows
- Turn on HVAC fan
- Ventilate room immediately
- Reduce activities
- Move out of room until light changes to green
Alarm - One Beep Two Beeps

Bluetooth Functionality

The HTRAM has Bluetooth functionality. It is possible to configure the device and view data history through the  mobile app. 

Additional Information

    Characteristic Parameter
    Dimensions (H × W × D) 80 mm × 80 mm × 22 mm [3.1 in × 3.1 in × 0.87 in]
    Weight 150 g
    Housing materials Aluminium alloy
    Display TFT
    Input voltage 5 V
    Input current 1 A
    Battery Lithium-ion rechargeable battery
    10-hour battery time
    Battery capacity 2,600 mAh
    Operating temperature &
    0°C to 50°C, 0% RH to 90% RH
    USB port Micro USB
    Alarm Type Audible- Visual
    Sub-Category Single-Gas
    Sensor Type NDIR
    Number of Gas Sensors Included 1
    Gas Type CO2
    Certifications - Regional CE, FCC, IC
    Certifications - Performance CE; FCC
    Warranty 1 yr limited warranty

    Sensor Description Sensor Detection Range
    CO2 (NDIR) 400 ppm to 2000 ppm
    Temperature -20°C to 60°C or -4°F to 140°F
    Humidity 0% RH to 100% RH






    Honeywell Transmission Risk Air Monitor-V1 with 3 pre-settings - white


    Honeywell Transmission Risk Air Monitor charging/power adapter  - UK version


      Honeywell Transmission Risk Air Monitor Wall Mount

    Write Your Own Review
    You're reviewing:Honeywell Transmission Risk Air Monitor
    Your Rating

    Sign up for our latest offers

    By submitting your details you consent to their use in accordance with our Privacy Notice