Verkada SV21 environmental sensor
Temperature, humidity and CO2 monitoring for server rooms, comms cupboards and cold storage. It does not detect vaping.
Specifications
SV21 at a glance
| SV21 | |
|---|---|
| Model and variants | SV21-HW |
| Measures | Temperature, relative humidity, CO₂ (photoacoustic, 0-40,000 ppm); derived heat index, humidex, dew point, mould risk |
| Vape / particulates | None — no vape index, TVOC or PM |
| Temperature range | -32 to 45°C (CO₂ accurate down to -5 C only) |
| Other | Tamper detection; 5 s sampling; offline mode stores data on device; up to 365 days on device and in cloud |
| Power / network | IEEE 802.3af PoE only, 4W; RJ-45 |
| Mounting | Wall or ceiling, horizontal or vertical; 170 x 169.5 x 48 mm, 500 g |
| Operating environment | Indoor, -32 to 45°C, 0-95% humidity |
| Licence | One sensor licence (LIC-SV) per sensor. |
| Warranty | 10 years |
From Verkada’s datasheets: sv21 datasheet sensor (PDF), help centre, air quality sensors overview (PDF). Checked 17 October 2026.
Installation
How we install the SV21
Sensors need a PoE network point. We place them where the readings are meaningful, set alert thresholds with you in Command, and check the results after the first week.
Other sensor models: SV23, SV25. See all on Verkada environmental sensors or the model guide.
FAQ
SV21 questions
What licence does the SV21 need?
One sensor licence (LIC-SV) per sensor. All the licences in one Command organisation share one renewal date.
Can you add a SV21 to my existing Verkada system?
Yes. It joins your existing Command organisation, and its licence co-terms with the rest, so you still have one renewal date. We work on systems whoever installed them.
Do you just supply the SV21, or install it too?
Either. Most customers have us survey, supply and install, but we can supply for your own installer after checking the model and licence are right for the job.
Need the SV21 on your site?
Free survey and a written design with an itemised quote. Call or send the form below.
Book a site survey Call 01727 822 833
Get in touch
Tell us what you need
Send us a few details and one of our engineers — not a call centre — will come back to you within one working day.
Call us01727 822 833
Email ushello@segcore.co.uk
Visit usSEG Command, 192 Watford Road, Chiswell Green, St Albans, Herts AL2 3EB
Helpdesk hoursMonday to Friday, 08:00–18:00 · out-of-hours cover available