Gracey & Associates Hire and Calibration
GRAS Microphones, Preamplifiers, Calibrators and Power Supplies
Gunnar Rasmussen is a very famous name in the world of acoustics. For many years he worked at Bruel & Kjaer designing and developing their world famous range of microphones.
In 1993 he set up his own company - GRAS - Gunnar Rasmussen Acoustic Systems to specialize in microphones and associated electronics. Click a link for more details.
GRAS firm specialises in precision measurements, having a extensive range of free-field, pressure and random incidence 1/2" and 1/4" condenser microphones. Plus specialist microphone systems like sound intensity probes and outdoor microphones with specifically designed responses to compensate for the vertical orientation due to the rain deflector, insert voltage calibration and the source of noise being at 90°. Click a blue link for more details.
| GRAS | Microphones, Preamplifiers, Instruments | Daily Hire * |
|---|---|---|
| GRAS 12AA | Power Supply Module - battery operated - 2 channel | £ 5 |
| GRAS 26AA | Preamplifier - 1/4" with 0.3 m of thin lead to 4-pin Lemo connector | £ 3 |
| GRAS 26AB | Preamplifier - 1/4" with 1/2" casing and integral 7-pin Lemo connector | £ 3 |
| GRAS 26AC | Preamplifier - 1/4" with 2m of thin cable to 7-pin Lemo connector | £ 3 |
| GRAS 26AF | Preamplifier - 1/2" with integral 7-pin Lemo connector | £ 3 |
| GRAS 26AG | Preamplifier - 1/2" with insert voltage and integral 7-pin Lemo connector | £ 3 |
| GRAS 26AK | Preamplifier - 1/2" with integral 7-pin Lemo connector - general purpose | £ 3 |
| GRAS 40AE | Microphone - 1/2", free-field, pre-polarised, general purpose | £ 4 |
| GRAS 40AF | Microphone - 1/2", free-field, 200 V polarisation, general purpose | £ 4 |
| GRAS 40AK | Microphone - 1/2", sound intensity set, matched pair with spacers | £ 12 |
| GRAS 40AN | Microphone - 1/2", free-field, 200 V polarisation, low frequency | £ 5 |
| GRAS 40AS | Microphone - 1/2", community noise - 90º incidence correction | £ 4 |
| GRAS 40BF | Microphone - 1/4", free-field, 200 V polarisation, wide band | £ 6 |
| GRAS 41AL | Outdoor Microphone System - type 1 | £ 8 |
| GRAS 42AA | Pistonphone Calibrator - 114 dB @ 250 Hz | £ 6 |
| GRAS 50AI | Sound Intensity Probe | £ 20 |
| GRAS 51AB | Sound Intensity Calibration Unit | £ 8 |
| GRAS | Accessories | Daily Hire * |
|---|---|---|
| AA 0008 | Cable - Preamplifier extension, 7-pin Lemo, 3 m | £ 2 |
| AA 0010 | Cable - GRAS 50AI probe extension, 12-pin Lemo, 10 m | £ 4 |
| AA 0011 | Cable - GRAS 50AI probe adaptor to 2 x 7-pin Lemo, 1 m | £ 3 |
| AB 0002 | Power supply - see GA 40B1-00 | |
| AG 0001 | Adaptor - 7-pin Lemo 1B socket to 7-pin B&K plug | £ 1 |
| AL 0001 | Desiccator delivered with 41AL systems | £ 2 |
| AL 0002 | Tripod adaptor - 1/2" preamplifier 'tube' | £ 1 |
| AL 0003 | Tripod adaptor - 1/2" and 1/4" - swivel head | £ 2 |
| AM 0037 | Transport cap delivered with 41AL systems | |
| AM 0145 | Windshield, was AM 0052 - see GA 83G1-00 | |
| GR 0010 | Adaptor - converts 1/4" preamplifiers for 1/2" microphones | £ 1 |
| RA 0001 | Adaptor - 1/2" microphones with 1/4" preamplifiers - 90 degrees | £ 1 |
| RA 0003 | Adaptor - 1/2" microphones with 1/4" preamplifiers - straight | £ 1 |
| RA 0010 | Calibration coupler - 41AL systems | £ 1 |
| RA 0011 | Goose-neck with 7-pin Lemo connectors | £ 2 |
| RA 0020 | Nose cone for 1/2" microphones | £ 2 |
* Our standard hire charges are based on a 4-day minimum period, details other options.
Gracey & Associates 01933 624212 hire@gracey.com
British Standards accreditation for noise and vibration instrument hire and calibration.
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GRAS keywords; G.R.A.S Microphone Hire, GRAS Sound Intensity