The Calsense Local Radio communication option, model CS3-LR, enables Command Center Online to communicate with a controller through a local radio system. A local radio is a 2-watt, narrowband UHF 450-470 MHz radio modem.


  • Blanket your entire City or campus with wireless communication so your Calsense controllers can share a single central communication option
  • Provides reliable long-range communications

Local Radio Communications Details

A local radio system has a single local radio hub and one or more controllers in the field with the local radio communication option. The hub manages data flow between the central computer and surrounding controllers.

Local Radio Communications Accessories


An antenna, purchased separately, is required to use the CS3-LR option for communication. Calsense offers three antennas, each designed to accommodate specific situations.

  • The Calsense Stubby Antenna, model LR-STUBBY, is an omnidirectional, low-profile transit antenna designed for all environments and applications.
  • The Calsense Stick Antenna, model LR-STICK-X-YYY, is a fiberglass omnidirectional antenna used to extend the range of a local radio system and is often recommended for use with local radio hubs and repeaters. This antenna is available in 0-, 3-, 5-, and 7-dBi, represented by X in the part number. Specify LR frequency at time of purchase to ensure the antenna is tuned properly.
  • The Calsense Yagi Antenna, model LR-YAGI-X, is an aluminum directional antenna typically used to extend the communications range of a specific controller location. This antenna is available in 7- and 10-dBi, represented by X in the part number.

Note: LMR-400-DB or LMR-600-DB cable is required if mounting a stick or yagi antenna.

Optional Equipment

Calsense also offers other equipment, including a frequency filter, surge protection, and external mounting options for local radio antennas.

  • The Calsense Local Radio Frequency Filter, model LR-FILTER, is a cavity resonator used to help prevent interference from unwanted frequencies by filtering them out.

Note: An LR-FILTER is required when using a LR-STICK antenna and recommended when using an LR-YAGI.

  • The Calsense Antenna Cable Surge Protector, model ANT-PROT, helps protect the RF filter, if installed, and the radio equipment from lightning strikes.

Note: An ANT-PROT is required when using an LR-STICK antenna and recommended when using an LR-YAGI.

  • The Calsense Antenna Standoff Mount, model ANT-SOM, is a three-foot standoff mount used for installing an antenna on a lattice tower, up to 3″ in diameter.
  • The Calsense antenna tripod, model ANT-TRIP5, is a non-penetrating five-foot high tripod mount which is ideally suited for roof mount applications. and can be bolted down or weighed down with standard cinder blocks.

Local Radio Communications Specifications

Wireless Interface

  • Frequency Range: 450 – 470 MHz
  • Output Power: up to 2-watts
  • Data Range: up to 70-miles, clear line of sight


  • Operating Temperature: -30° to 60°C (-22° to 140°F)
  • Relative Humidity: 0 to 95%, non-condensing


  • Emissions: FCC, IC
  • Safety: UL® Class 1, Div 2


  • 3-year limited warranty

UL is registered certification mark of UL LLC.