5209 – Signal Recovery Lock-in Amplifiers
120.00kHz (High end frequency limit)

5210 – Signal Recovery Lock-in Amplifiers
120.00kHz (High end frequency limit)

7225 – Signal Recovery Lock-in Amplifiers
120.00kHz (High end frequency limit)

7225BFP – Signal Recovery Lock-in Amplifiers
120.00kHz (High end frequency limit)

SR810 – Stanford Research Systems Lock-in Amplifiers
102.40kHz (High end frequency limit)