UHF / VHF Radios
RF500M Radio Modem
The RF500M is a versatile radio modem for PakBus and ALERT networks with UHF/VHF radios. It can serve as a field modem connected to a...
RF500B UHF/VHF RF Base Station
The RF500B contains equipment used in an RF base station for PakBus networks with UHF/VHF radios. It resides at the computer site and serves as a...
RF310 VHF Radio Transceiver
The RF310 VHF radio is temporarily unavailable. The RF313 UHF radio is a possible alternative; contact Campbell Scientific for more information.
The RF310 is a rugged,...
RF312 UHF Radio Transceiver
The RF312 is a rugged, narrowband UHF radio transceiver for customers with an FCC-assigned frequency in the range of 440 to 480 MHz. It is...
RF313 UHF Radio Transceiver
The RF313 is a rugged, narrowband UHF radio transceiver for customers with an FCC-assigned frequency in the range of 400 to 440 MHz. It is...
RF310M RF Modem
Note: Campbell Scientific recommends the RF500M Modem for new RF networks that use PakBus dataloggers.
The RF310M functions as the communication interface between a...
RF315M RF Modem
Note: Campbell Scientific recommends the RF500M Modem for new RF networks that use PakBus dataloggers.
The RF315M provides the communication interface between a datalogger and...
RF300 VHF Radio Transceiver
NOTE: The RF300-series transceivers are still available for customers who already own RF300-series transceivers, but for newer radio customers, the RF310-series is usually a better...
RF301 VHF Radio Transceiver
NOTE: The RF300-series transceivers are still available for customers who already own RF300-series transceivers, but for newer radio customers, the RF310-series is usually a better...
RF302 UHF Radio Transceiver
NOTE: The RF300-series transceivers are still available for customers who already own RF300-series transceivers, but for newer radio customers, the RF310-series is usually a better...
RF303 UHF Radio Transceiver
NOTE: The RF300-series transceivers are still available for customers who already own RF300-series transceivers, but for newer radio customers, the RF310-series is usually a better...
RF304 UHF Radio Transceiver
NOTE: The RF300-series transceivers are still available for customers who already own RF300-series transceivers, but for newer radio customers, the RF310-series is usually a better...
RF232A RF Base Station
Note: Campbell Scientific recommends the RF500M Modem for new RF networks that use PakBus dataloggers.
The RF232A serves as a link to field stations and...
RF95A RF Modem
Note: Campbell Scientific recommends the RF500M Modem for new RF networks that use PakBus dataloggers.
Used with our RF300-series radios, the RF95A provides an...
Resources and Links
About UHF / VHF Radios
Campbell Scientific's narrow-band RF systems consist of a radio modem and a low-powered transceiver at the remote station(s), and a transceiver connected to a base station at the computer site. Up to 254 stations can be interrogated over a single UHF or VHF frequency. Stations with compatible radio and radio modem can serve as repeaters to extend the line-of-sight transmission of the base station. Transmission distance is typically up to 25 miles between stations (line-of-sight).
An FCC-approved frequency assignment is required before radios and antennas can be ordered. Within a typical RF telemetry network, field sites use a directional "Yagi" antenna, repeater sites use omnidirectional antennas, and the base station may use either an omnidirectional or Yagi antenna depending on the geographic distribution of the network.
A typical field station contains a datalogger and is located at the measurement site. Repeater stations act as a communication relay between stations that cannot communicate due to distance or obstacles. A repeater station can be upgraded to a field station with the addition of a datalogger and sensors.
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