G.R.A.S. 26CS 1/4" CCP Standard Preamplifier with Microdot Connector, Very Short

Freq range: 2.5 Hz - 200 kHz
Noise: 1.8 µV
Gain: -0.45 dB
Special feature: For confined spaces

Typical applications and use

  • Confined spaces
  • High-frequency measurements
  • High-pressure measurements
  • Sound intensity measurements
  • Near-field measurements
  • Anechoic boxes
  • Hearing-aid measurements

Design

Its small ceramic thick-film substrate has a very high input impedance, and is shielded by a guard ring to minimise the influence of stray capacitance and microphonic interference.

The 26CS is delivered with Generation II TEDS. The calibration data is programmed into the built-in TEDS according to IEEE 1451.4 using UDID I27-0-0-0U. If your measurement platform supports Transducer Electronic Data Sheets you will be able to read and write data like properties and calibration data.

Generation II TEDS chip (DS2431) may require updated system software.

It can be used with G.R.A.S. 40BE and 40BD 1/4" and 40AE, 40AD and 40AQ 1/2" prepolarized microphones using the included G.R.A.S. GR0010 Adapter for 1/4" preamplifier and 1/2" microphone.

The 26CS has an integrated Microdot output connector. Microdot-to-BNC cables are available. The casing is made of stainless steel for maximum strength and durability.

Frequency range (±0.2 dB) with 18 pF microphone dummy Hz 2.5 to 200 k
Slew rate V/µs 20
Input impedance GΩ // pF 20 // 0.4
Output impedance Ω < 50
Output Voltage Swing, min. @ 24-28 V CCP voltage supply Vp 8
Noise (A-Weighted) max. µV 2.5
Noise (A-Weighted) typ. µV 1.8
Noise (Linear 20 Hz – 20 kHz) max. µV 6
Noise (Linear 20 Hz – 20 kHz) typ. µV 3.5
Gain dB -0.45
Power supply (Constant Current Power) mA 2 to 20 (typ. 4)
DC bias voltage, typ. V 12
Temperature range, operation °C / °F -30 to 70 / -22 to 158
Temperature range, storage °C / °F -40 to 85 / -40 to 185
Humidity range non condensing % RH 0 to 95
TEDS UDID (IEEE 1451.4) I27-0-0-0U
Connector type Microdot 10/32
CE/RoHS compliant/WEEE registered Yes / Yes, Yes
Weight g / oz 3.0 / 0.12
Conditions: 23 °C Ambient temperature, 4 mA / 24 V open loop CCP voltage, 18 pF dummy microphone, 3 m output coax-cable. G.R.A.S. Sound & Vibration reserves the right to change specifications and accessories without notice.

Included items

GR0010

Adapter for 1/4" preamplifier and 1/2" microphone

 

Optional items

G.R.A.S. AA0070

3 m Microdot - BNC Cable

G.R.A.S. AA0073-CL

Customized Length Microdot - BNC Cable

G.R.A.S. AA0087-CL

Customized Length Microdot - Microdot Cable

G.R.A.S. AL0029

1/4" Microphone Holder, POM

G.R.A.S. AL0013

1/4" Microphone Holder, Stainless Steel

G.R.A.S. AL0005

Swivel head

G.R.A.S. AL0006

Tripod

G.R.A.S. RA0063

Adapter for 1/8" microphone and 1/4" preamplifier

G.R.A.S. RA0006

Right-angled (90º) Adapter for 1/4" Microphone and 1/4" Preamplifier

G.R.A.S. RA0080

6pF Preamplifier-input adapter for 1/4" microphones

G.R.A.S. 12AL

1-Channel CCP Power Module with A-weighting filter

G.R.A.S. 12AQ

2-Channel Universal Power Module with signal conditioning and PC interface

G.R.A.S. Sound & Vibration reserves the right to change specifications and accessories without notice.