The 2307 Adjustable Gain Balanced Receiver takes the headache out of aligning and re-aligning your 400-1070 nm beams onto the photodetector by featuring a large 8 mm diameter Silicon photodiode. Ideal for FM spectroscopy, absorption spectroscopy, or ellipsometry, these balanced photoreceivers can make all the difference when you're trying to see a small signal. They can even eliminate the need for lock-in amplifiers, enabling you to cancel out laser-intensity noise in any experimental setup that produces either a reference signal or balanced optical signals. These photoreceivers can operate off batteries, your own DC power supply or our Model 0901 power supply. 8-32 mounting thread. M4 metric adaptor and tool now included.