The KS25 Gas Valve Manual Reset is used to securely reinstate the electrical supply to a gas valve in a commercial plant room. The key switch operation provides security against unauthorized operation. Electrical installation should be made as shown below by a qualified electrical engineer.
Calmo – CO2 Monitor 230V or USB Powered
Introducing the Calmo CO2 Monitor: Your Ultimate NDIR CO2, Temperature, and Humidity Solution.
Ensure a healthy indoor environment with our advanced Calmo CO2 Monitor. This state-of-the-art device measures CO2 levels, temperature, and humidity. The Duomo Calmo capturesย air quality data for homes, offices, and classrooms.
Key Features
- Real-Time Air Quality Monitoring:
Stay informed with real-time Carbon Dioxide levels to maintain optimal air quality.
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Accurate Measurements:
The Calmo Monitor employs NDIR technology to deliver precise readings of CO2 levels, temperature, and humidity, empowering you to take proactive measures for comfort and well-being.
- Trend Analysis:
Access 8-hour and 24-hour average and peak readings to identify air quality trends and variations. Use this valuable data to make informed decisions for your indoor environment.
- User-Friendly Design:
Traffic Light Display: Our intuitive color-coded system provides an instant visual assessment of air quality levels, making it easy to monitor even from a distance.
- Optional Audible Alerts:
An optional integrated buzzer alerts you when air quality reaches alarm levels, ensuring you stay informed about critical changes.
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Versatile Power Options:
The Calmo Monitor offers flexible power solutions, with options for USB-C or 230VAC Hardwired connections. This compatibility allows for easy installation in various settings, making it an ideal choice for any indoor space.
<strong>Why Choose the Calmo CO2 Monitor?
Invest in your health and comfort with the Calmo USB CO2 Monitor. Its advanced features and user-friendly design make it the perfect tool for improving air quality management.


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CO2MC 24V – CO2, Temp & RH Monitor
The Duomo CO2MC 24V is designed to monitor Carbon Dioxide levels in offices, schools, kitchens, and labs. This model operates on 24V and is also available in 230V. Featuring a backlit traffic light display, the monitor changes colour as CO2 levels fluctuate: green for safe levels, yellow for caution, and red for high levels. Ensure a healthier environment with the Duomo CO2MC for effective air quality monitoring.
Aranet4 PRO No Display & Free Anti Theft Wall Bracket
The Aranet4 sensor is an innovative, stand-alone device for effortless monitoring of indoor air quality, including CO2, relative humidity, temperature, and atmospheric pressure. The Aranet4 PRO sensor is compatible with Aranet Cloud. This service is an industrial-grade solution for IoT ecosystems & remote management. Personalise your data with custom dashboards, graphs, and user management. Learn more
The Aranet4 HOME is here. A wireless AA battery-operated CO2 monitor. App enabled, custom reporting.
Want to know the Aranet4 HOME & PRO features and differences?
Aranet4 PRO Base Station 12
The Aranet4 PRO Base Station is an advanced network solution for use with Aranet4 PRO sensors. Up to 100 sensors at a 3km line of sight range. Cloud solutions available separately that allow almost infinite numbers of sensors from different locations.
This Aranet PRO Base station will be licensed for use with up to 12 Aranet PRO sensors. It is upgradeable to support up to 100 sensors.
Other models for use with more sensors are available:
- Aranet PRO Base Station 50 – licensed for use with up to 50 Aranet PRO sensors.
- Aranet PRO Base Station 100 – licensed for use with up to 100 Aranet PRO sensors.
FREE SHIPPING ON ALL ARANET4 PRODUCTS
Aranet4 PRO Base Station 50
The Aranet4 PRO Base Station is an advanced network solution for use with Aranet4 PRO sensors. Up to 100 sensors at a 3km line of sight range. Cloud solutions available separately that allow almost infinite numbers of sensors from different locations.
This Aranet PRO Base station will be licensed for use with up to 50 Aranet PRO sensors. It is upgradeable to support up to 100 sensors.
- Aranet PRO Base Station 12 โ licensed for use with up to 12 Aranet PRO sensors.
- Aranet PRO Base Station 100ย โ licensed for use with up to 100 Aranet PRO sensors.
FREE SHIPPING ON ALL ARANET4 PRODUCTS
Aranet4 PRO Base Station 100
The Aranet4 PRO Base Station is an advanced network solution for use with Aranet4 PRO sensors. Up to 100 sensors at a 3km line of sight range. Cloud solutions available separately that allow almost infinite numbers of sensors from different locations.
This Aranet PRO Base station can support the maximum of 100 Aranet PRO sensors.
Other models for use with fewer sensors are available:
- Aranet PRO Base Station 12 โ licensed for use with up to 12 Aranet PRO sensors.
- Aranet PRO Base Station 50ย โ licensed for use with up to 50 Aranet PRO sensors.
FREE SHIPPING ON ALL ARANET4 PRODUCTS
SG880 – CO2 Gas Sensor
The SG880 CO2 is a stand-alone infrared gas detection monitor.
Test Valve – For use with Duomo Test Gas
Supplied with polyurethane tubing for connection to canister.
Please note: You must choose the correct test valve for your size of test gas canister. The large test canisters (110 litre) need the Test Valve – For use with Duomo Test Gas – Large (for use with 110l Test Gas) and the smaller canisters (12 litres) need the Duomo Test Gas Size: Small (for use with 12l Test Gas).ย
CPS 6000 Master & Slave panels
The concept is simple, the CPU 6000 will normally display green when everything is OK and Red when there is an alarm condition.
Welcome to theย Duomo Knowledge Centre
This is the UKโs Go-To resource for Gas Detection & Safety Equipment and is updated regularly. If we havenโt already written about a particular aspect that youโre interested in, then please submit your enquiry here and one of our qualified team of engineers will take a look.
Download our Brochure
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Frequently Asked Questions
Can I buy products online at Duomo.co.uk
Yes โ you can browse our products, see prices and purchase online. Not all prices are available online so we would ask that you contact us for more information on those products on +44 (0)1905 797989
Do your prices include VAT?
All prices at Net prices shown in GBP (ยฃ) & exclude Value Added Tax.
VAT is added at checkout when purchasing online to all orders dispatched within the UK.
Can I have my order delivered to a different delivery address?
Yes. When you place your order you can add a different delivery address. If the billing address is different to your delivery address the invoice will always be sent to your billing address. Please remember your billing address is the address at which your payment card is registered.
Are all the products on your website in stock?
We make every effort to ensure that products listed on our website are currently in stock & available for despatch. However, if an item is out of stock due to high demand, we will contact you as soon as possible to either suggest a carefully selected alternative, or to advise you of a delivery date.
Can I order over the telephone?
Yes. You can place an order with us over the telephone by calling us on +44 (0)1905 797989 between 9.00am & 16:45pm Monday to Friday.
Do you offer any discounts?
Discounts may be available for large quantity purchases. The item price is calculated when you increase / decrease the number of units required on any product page. Please ask our sales team about multiple quantity purchases on the products that are not available to purchase online. ย Call +44 1905 797989ย or email [email protected] with your details and the product(s) you are interested in and we will provide you with a quotation.
Support & Service
If you require technical assistance or an annual service on this product please contact us and we will be happy to help. Our qualified team of engineers are available Nationwide.








