Brands
The database covers 16 manufacturers of professional instruments. Every brand is listed on the same terms, with the same specification template, and in alphabetical order. Counts are of instrument records; a record can hold several variants.
| Brand | Country | Handheld meters | Dosimeters | Monitoring stations | Note |
|---|---|---|---|---|---|
| ACOEM (01dB) | France | 1 | 0 | 3 | 01dB brand within ACOEM. |
| Bedrock | Netherlands | 6 | 0 | 2 | |
| Casella | United Kingdom | 3 | 2 | 1 | Owned by TSI since October 2022 (previously IDEAL Industries). |
| Cirrus Research | United Kingdom | 2 | 3 | 4 | |
| Delta OHM (Senseca) | Italy | 5 | 0 | 0 | Delta OHM is now part of Senseca. |
| HBK (Brüel & Kjær) | Denmark | 4 | 1 | 1 | Brüel & Kjær and HBM merged into HBK (Hottinger Brüel & Kjær), part of Spectris. |
| Larson Davis | United States | 5 | 3 | 3 | A PCB Piezotronics division (Amphenol). |
| Norsonic | Norway | 5 | 0 | 1 | Norsonic AS, owned by Rion. |
| NTi Audio | Liechtenstein | 2 | 0 | 1 | |
| Ono Sokki | Japan | 9 | 0 | 0 | |
| Pulsar Instruments | United Kingdom | 1 | 3 | 1 | |
| Rion | Japan | 7 | 1 | 1 | Rion Co., Ltd. Owner of Norsonic since 2024. |
| Sinus Messtechnik | Germany | 3 | 0 | 2 | |
| Soft dB | Canada | 2 | 0 | 2 | |
| Svantek | Poland | 5 | 5 | 4 | |
| TSI Quest | United States | 4 | 6 | 0 | Quest Technologies brand within TSI. |