Koti > Measurement, tracking, IoT and remote control

Measurement, tracking, IoT and remote control

Bluetooth sensors: measurement & automation

In this category you will find smart Bluetooth sensors that are suitable for both home use and industrial measurement and automation. The sensors monitor conditions in real time – temperature, humidity, air pressure or movement – and send the data directly to your phone or control system.

Why choose a Bluetooth sensor?

  • Wireless functionality and easy connectivity
  • Accurate measurement with multiple parameters
  • Versatility through RuuviTag sensors
  • Long battery life and durable construction

Typical applications

Recommended additional products

  • Ruuvi Gateway : for remote monitoring and cloud connections
  • Waterproof protective cases
  • Expandable sensor packages: suitable for home and professional use

Also check out the entire online store selection or return to the home page where you will find a route to our other product categories , our blog and to continue shopping.

FAQ – Frequently Asked Questions (Musou Black) {#faq}

How black is the product?

Up to 99.4% visible light absorption. Practically a “black hole” – the surface appears two-dimensional.

Brush or sprayer?

Both work. For maximum blackness: spray several thin layers. You can also get a very matte black result with a brush.

How many floors?

Often 1 coat is enough, but 2 thin coats will give the most even super black. In bright light, a 3rd thin coat for maximum effect.

Yield & sizes?

As a guide, 100 ml ≈ 0.8–1 m² (2 thin coats, depending on the surface). 1 L ≈ 8–10 m² . Available in 100 ml, 1 L and larger quantities on request.

Example: 10 m² effect wall with two thin layers → ≈ 1 L .

Can it be used outdoors?

Mainly for indoor use. Outdoors, UV and weather stress the surface – requires careful underlayment and protection, and the effect may fade over time

Is it safe indoors?

Yes. The paint is water-based , very low-emission and odorless . Use normal protective clothing and ensure ventilation. However, do not leave it out of reach of children or pets.

What about Musou Black vs. Black 4.0?

Black 4.0 is an excellent artist's paint, but Musou Black is known for its optical depth – especially when applied in thin layers by spray. Plus, you can get Musou quickly from Finland and with local support .

Read the comparison →

Do I need varnish?

Generally not – clear varnish increases the shine and reduces the properties of black. If protection is necessary, test on a small area.

How do I clean/remove?

Clean wet paint by lightly wiping or using compressed air. To remove dried paint, use mechanical sanding or paint remover – ask us for material-specific instructions.

Be mindful of the environment:

Wash tools with water immediately after use. Dispose of excess paint and empty containers in hazardous waste collection points – not down the drain.