Equipment Solutions produces a broad range of Digital Autocollimators. Below is a table that compares the basic specifications of those models.

	Product Name	Mech. Angle arcmin / mrad	Max Range cm / in	Resolution arsec / urad	Wavelength nm	Interface
	AC201	±172 / ±50	5 / 2	0.2 / 1	840	USB Analog Encoder
	AC421	±34 / ±10	200 / 79	0.1 / 0.5	670	RS232
	AC424	±103 / ±30	28 / 11	2 / 10	670	RS232
	AC453	±40 / ±11.5	210 / 84	3.6 / 18	670	RS232