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 a built-in TEDS chip, and can be programmed as a single unit with a microphone fitted. 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
High-pass filter @3dB cut-off Hz TBD
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 UTID (IEEE 1451.4) 769 v. 0.9
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.

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. RA0118

Attenuator for 1/4" microphones

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