- GA1001 - Excalibur
- GA1001 - Excalibur - File Creation and Editing
- GA1001 - Excalibur - Getting Started Guide
- GA109, GA206 - Analogue Sound Level Meters
- GA110, GA111, GA156, GA210, GA254 - Pocket Range Meters
- GA112 - Analogue Octave Sound Level Meter
- GA113 - Combined Integrating Sound Level Meter
- GA120, GA121, GA122, GA123, GA221 - Professional Range
- GA131 - Pro-DX Vocis
- GA131 - Pro-DX Vocis Quickstart Guide
- GA208, GA214, GA255 - Pocket Range
- GA213, GA215, GA256 - Pocket Range
- GA301 - Sound Level Meter
- GA504 - Use of the Sony DAT Recorder with Castle Instruments
- GA601, GA607 - Sound Meter Calibrators
- GA802 - Vehicle Noise Analyser
- GA802 - Vehicle Noise Analyser Quickstart Guide
- GA902 - Noise Activated Warning Sign
- GA904 - Entertainment Noise Controller
- GA905 - Industrial Sound Level Switch
- GA907 - dBAlert! Personal Noise Activated Warning Unit
- KA011 - Weather-Proof Sound Meter Enclosures
- KA018 - Weather-Proof Sound Meter Enclosure
- PC005 - dBdata4W Noise
- PC007 - dBdataPro
