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2-channel Sensor Amplifier
SR-2210A

The SR-2210A is a sensor amplifier for measuring both sound and vibration, compatible with CCLD (constant current drive) microphones and accelerometers.

It can be used as a front-stage amplifier for recording and analysis using oscilloscopes or data loggers, and can also be directly connected to the PLC for device control.

Output gain can be adjusted in 10 dB steps (–10 dB to +60 dB), allowing for optimal output levels as an amplifier for microphones.

Features

  • Supports sensors with a power supply of 4 mA/24 V
    Measurements are possible using sensors such as the low-noise microphone MI-1282M10 and the ultra-compact Accelerometer NP-3211. 

  • Frequency weighting characteristics (A/C/FLAT(Z)) supported
    It supports two frequency weightings: A characteristic tailored to the human ear's perception and C characteristic suitable for measuring loud sounds and impact noises.

  • Simultaneous measurement of 2 channels is possible
    With this single unit, you can perform measurements utilizing 2 channels, such as shipping inspections through simultaneous measurement of sound pressure and vibration, and measuring sound insulation performance at two locations separated by a wall.

  • Supports 2 types of power systems
    Compatible with batteries (4 AA batteries) and AC adapter (PB-7090 optional).

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Specification

Constant current power supply Current: 4 mA ± 20% (at 25°C)
Voltage: DC 24 V typ. (23 V to 26 V)
Number of Channels 2 channels
Use frequency range 1 Hz ～ 20 kHz （± 0.5 dB、gain 0 dB、FLAT(Z) at 1 kHz reference）
（load impedance 100 kΩ or more）
input impedance 1 MΩ ± 0.5 %
Input cutoff frequency Approximately 0.16 Hz
Input Voltage Range Maximum 12.5 dBVrms (±6 V)
Gain –10 dB/0 dB/10 dB/20 dB/30 dB/40 dB/50 dB/60 dB (± 0.2 dB)
(10 dB step 8 position switch)
Frequency weighting characteristic A/C/FLAT(Z) (Compliance Standards: IEC 61672-1, JIS C 1509-1)
Output cut-off frequency Approximately 0.2 Hz or less (load impedance 100 kΩ or more)
Approximately 0.4 Hz or less (load impedance 50 kΩ or more)
Input conversion self-noise A below -105 dBVrms
C below -100 dBVrms
Z(FLAT) below -95 dBVrms
Input and Output Connector BNC (CO2)
Output Voltage Range Maximum 12.6 dBVrms (±6 V)
Maximum output extension within 30 meters
Power Supply 4 pieces AA batteries
External power: PB-7090*​ AC adapter (optional)
*PB-7090 is not compatible for SR-2200. Do not connect and use it in this manner. It may cause malfunction.
Continuous Operation Time 20 時間以上
※計測用マイクロホンMI-1235・マイクロホンプリアンプMI-3120接続時
※単3形アルカリ乾電池（LR06）4本使用時
Operating Temperature Range -10 to +50 °C (excluding the battery)
Storage Temperature Range -20 to +60 °C (excluding the battery)
Operating Humidity Range 30 to 90% RH (non-condensing)
Storage Humidity Range 10 to 90% RH (non-condensing)
Outline Dimensions 140 (W) × 40 (H) × 125 (D) mm (excluding protrusions)
Weight Approximately 500 g (including the battery)
Accessories Instruction Manuals
Price  

When a sensor with TEDS functionality is connected, the TEDS function will be disabled.

System Configurations

Model name   Length Price (including tax) Operating Temperature Range
MX-1001 Low/High Temperature Specification Signal Cable
Composition No.1		 1.5 m   -30 to +80 °C
MX-1005 5 m  
MX-1020 20 m  
MX-2001 Composition No.2 1.5 m   0 to +60 °C
MX-2005 5 m  
MX-2020 20 m  
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最終更新日:2026/07/22