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Photobeam Activity System-Home Cage

Get the most accurate qualitative analysis of mouse or rat home cage activity with Photobeam Activity System-Home Cage (PAS-HC). Your locomotor activity tests will be reliable and accurate with data ready for analysis in a single study file.

Unlike other systems, your subject’s locomotor activity will be precisely tracked by a 4×8 photobeam configuration that reports breaks in real time, requiring no special calibration. Test up to 32 stations at a time for as long as seven days-or 24 when using the option rearing frame-and set it all up quickly with no technical knowledge required.


  • Capture the most accurate beam breaks with the 4×8 photobeam configuration
  • Record all beam interruptions and patterns, including x, y positions
  • Test for 7 days without human intervention
  • Set up the menu-driven software in minutes
  • Easily assemble up to 64 test stations using color-coded Ethernet cables
  • Use the optional rearing frame for up to 32 test stations


SDI’s Photobeam Activity System- Home Cage (PAS-HC) is designed to provide an affordable locomotor activity system that offers the greatest amount of flexibility and most accurate qualitative analysis of mouse or rat home cage activity.

A 4×8 photobeam configuration precisely tracks the animal’s locomotor activity to ensure you don’t miss any important movement data. Plus, unlike competitors, all beam breaks are reported in real time so no special calibrators are required to measure locomotor behavior.

A unique feature to SDI’s PAS-HC system is the PAS software. The software accurately records all beam interruptions, central peripheral activity, ambulation movements, fine movements, rearing, and time stamped (x,y) positions—giving you the ability to measure locomotor activity at any level of detail needed. It will also store your data in a single file providing exceptionally easy export and analysis.

Made to be flexible for your needs, the PAS-HC is adaptable from one test station up to 48, and can accommodate up to 24 stations when the optional rearing frame is put into place.

The home cage system is designed using a lab-standard transparent acrylic cage, keeping it an affordable choice for home cage testing. In addition, SDI’s Home Cage enclosure is well suited for long term activity tests where food and water are required.

Highlights of the PAS-Home Cage Include:#

Track Movement More Accurately than with Other Systems The PAS Home Cage system uses a 4×8 photobeam array to accurately track the movement of the animal. As the software calculates the animals x, y coordinates provided by the beams, the animal’s tracking is available for viewing on your screen. Many other systems just use a motion sensor or single axis beam sets, which rob you of valuable data.

Meet the Needs of Circadian Rhythm Tests Run a maximum configuration (up to 48 stations) for up to seven days without human intervention. This long term ability assures that the PAS-HC can meet the needs of circadian rhythm tests.

Obtain Qualitative Data Not Found in Other Systems The PAS software utilizes the total beam pattern to calculate the centroid position of the animal and makes your center/peripheral results available for analysis, along with the ability to apply zone maps to the data. Determine distance, speed, resting time—and even zone entries and time in zone—for a comprehensive scope of data available for analysis.

The Most Accurate, Easy-to-Use Software Available Your PAS software will add significant flexibility and accuracy to your study. Not only is all of your data saved in one, easily accessed file—but you can define your complete study in advance by pre-assigning animals to specific stations for each session, and then assigning a predefined protocol to every test session.

The software will automatically record your session data and keep it all together in the study’s single file. When you are ready, display your data right on your computer monitor or choose to export it with one click to Microsoft® Excel or to a delimited file type(TAB, CSV, etc.). Other software features include:

Define Your Study in Advance Make sure you collect the most accurate data possible by defining each of your planned test sessions. You will be able to plan session parameters, set subject identifiers, assign subjects to specific test stations, and specify subject parameters such as dose level. To keep from losing any critical data, it will all be stored in a single file format.

Automatically Run Sessions Defining your study in advance not only saves you time by automating sessions, but eliminates run time decisions and data entry that can cause mistakes. You’ll also ensure your results are tightly coupled to your predefined subject identifiers. Simply follow the PAS software instructions to execute the test session.

Real Time Beam Break Display Assure the accuracy of your operation with a real time display of beam breaks—which gives you a visual representation of the animal’s activity patterns. Other systems rely on blinking lights on the frames to give you a status but this does not give you a visual indicator of the activity pattern.

Beam breaks are automatically categorized as “ambulations,” “fine movements,” or “rearing” and are based on distance moved, not duration of time, further ensuring accuracy in your results.

Export Directly to Microsoft® Excel (or any delimited file type) The PAS software makes table formatted results available for direct export to Microsoft® Excel or to a delimited file type(TAB, CSV, etc.) and automatically identifies data by column headers. Since the data is exported from a single file, you won’t lose critical information and you’ll save time by removing the need to aggregate multiple single files and possibly reformat them again.

Connect without Complications To make your connection as easy as possible, the PAS-HC uses standard Ethernet cables, color-coded yellow and blue, along with color-coded frame and control box connections. In addition, all of the data cables from the control box to the PC data are numbered. Using these two approaches helps you avoid confusion and mistakes when connecting your PAS equipment.

System Components Include:

  • 4 x 8 Photobeam Mounting Frame
  • Control Unit
  • Software
  • User Manual
  • All Cables and Connectors


Frame Dimensions Inside Dimensions: 10″ (W) x 18.5″ (L) Outside Dimensions: 11.5″ (W) x 20″ (L)

Weight 4 lbs.

Composition Stainless Steel Frames

Maximum # Stations 64 32 (with rearing) Note: It is possible to add one more PAS Distribution Box to double the number of configurable stations.

PAS Distribution Box 11.75″ (W) x 18.75″ (L)

Number of Photobeams 4 x 8

Photobeam Spacing

1 15⁄16″

Optional Rearing Frame Frame dimensions as above with 1″ photobeam spacing

Standard Cable Length 12 ft.

Certifications CE FDA CFR Part 11