AUER SIGNAL

Surface mounted siren BU1/ panel mounted buzzer BU2/BU3

BU1, BU2 and BU3 series

Quick and easy installation Adjustable noise level at front (approx. 10 dB ) Pulsating sound Application area BU1 Surface mounted buzzer with high sound level and high IP-class. With its embedded cable, the siren is easily fitted on the machine without any encapsulation. Application area BU2/BU3
  • High noise level 108 dB
  • IP66 embedded cable
  • Adjustable sound level in the front approx. 10 dB (BU2/BU3)

Selected variant

Avaible in several variants

Selected variant

Specifications

Color House Black
Diameter 43
IP Class IP54
Mounting Panel mount
Nominal current max 0.02
Nominal current min 0.02
Number of tones 1
Operating Voltage AC Max 240
Operating Voltage AC Min 180
Sound control Yes
Sound level max 90
Sound level min 80
Temperature range from -20
Temperature range to 70
Tone frequency max 3500
Tone frequency min 2500
Weight 35

Measurements and connections

Product description

Small panel mounted buzzer with flat terminal connection. The sound is easily adjusted through a window at the front and the sound can be trimmed up to approx. 10 dB

Accessories

DF electrci 485121
Blog

Reliable Protection, Compact Form – Fuse Holders Built to Perform

The DF Electric 485121 fuse holder delivers reliable protection in a compact, DIN-rail-ready design. Built for panel builders who won’t compromise on safety or performance, it’s the trusted choice for tough environments and tight spaces.

stego loop
Blog

Stego Enclosure Heaters with Loop

STEGO’s new loop enclosure heaters are a smart fix for condensation in control cabinets. They heat evenly, install fast with no tools, and come in a range of sizes from 10 to 150 W. They're tough, touch-safe, and even have a built-in thermostat option—everything you need to protect your gear and keep things running smoothly.

draw wire
Blog

Precision in Motion: Kübler Linear Measurement Systems at Demesne Electrical

Precise, Durable Linear Measurement from Kübler
Browse our range of Kübler draw wire encoders and linear measurement systems, designed for accurate position and speed sensing in industrial and OEM applications. Built for tough environments. Trusted by automation professionals.

hora
Blog

New on the Market: RKA Aluminium Terminal Blocks for Copper and Aluminium Conductors

Designed by HORA eTec, the RKA series offers a complete lineup of aluminium terminal blocks built for both aluminium and copper conductors. Every model in the range includes push-through protection, is finger-safe, and is built with installation efficiency in mind. From compact control panels to large-scale systems, here’s the full breakdown—from the RKA 16 to the RKA 300.

telehaase
Blog

Smarter Control Starts Here Explore the TELE Haase Range at Demesne

In complex, high-stakes electrical environments, precision, safety, and performance aren't optional, they're essential. That’s why at Demesne Electrical, we supply solutions that go beyond compliance, empowering engineers and panel builders to build smarter, more connected systems.
One of our most trusted partners in this space is TELE Haase, an industry leader in intelligent monitoring and automation components. From load protection to digital performance sensors, the TELE range offers future-focused tools that streamline system diagnostics and improve long-term reliability.

puls
Blog

Power Supply Efficiency Testing – What Irish Electrical Engineers Need to Know

Think your power supply is running at 95% efficiency?
Don’t just trust the datasheet, test it. In this post, we break down how to accurately measure power supply efficiency using the right tools, setups, and real-world conditions. Essential reading for anyone working with industrial power in Ireland.

My favourites Articles Nominal current max Nominal current min Operating Voltage AC / DC Max Operating Voltage AC Max Operating Voltage AC Min Supply Voltage Supply Voltage AC / DC Min Price
0.03
0.03
28
24
12
0.02
0.02
240
180

Selected variant

Select a variant in the list

Customer support
Our customer support team answers all kinds of questions.
+35314047700
Send e-mail
Do you need help?

Cookie settings for Demesne

Cookies help us improve your experience with us, so in order to be able to handle login information, offer you personalised content and for basic functionality of this website, we use some cookies.

We will never sell on any information about you. 

Necessary Cookies

These cookies are necessary for the website to work and can not be turned off in our systems. They are usually used only in response to actions you have taken in connection with a service request, for example when setting personal preferences, logging in or filling out a form.

Analysis and measurement cookies

These cookies allow us to count the number of visits and traffic sources so that we can measure and improve our website performance. They help us know which pages are more or less popular and how visitors navigate around the site. The information that these cookies collect is aggregated and therefore completely anonymous. If you do not allow these cookies, we do not know when you have visited our website.

Marketing cookies

These cookies can be added by our partners. They can use them to create a profile of you, based on your interests, to show you more relevant information. They do not store any personal information - only information about your browser and device. If you do not accept these cookies, you will have a more general and less customized user experience.

Please login or continue as a guest

To get the best deals
Login | Create account