Limited Availability ›
This product has limited availability. Some accessories, replacement parts, or services may still be available when it is no longer available.
RF432 2.4 GHz Spread-Spectrum Radio
With USB and

weather applications supported water applications supported energy applications supported gas flux and turbulence applications supported infrastructure applications supported soil applications supported


The RF432 spread-spectrum radio includes a USB port to make it easier to connect to newer computers that do not have RS-232 ports. This 50 mW spread-spectrum radio/modem operates in the 2.450 to 2.460 GHz frequency range, which is used worldwide. The RF432 can transmit data to another RF432 radio, an RF416 radio, or a CR216(X) datalogger.

The RF432 supports point-to-point and point-to-multipoint communications. Although it typically serves as a base station modem/radio, the RF432 can connect to the datalogger RS-232 port to serve as a field modem (requires a null modem cable and a field power cable).

NOTE: Due to legal changes in the EU, we are not allowed  to sell this product after January 1, 2015 unless we receive a written declaration that the customer wants to use it outside Europe or as a spare part in an existing network.

Read More

Benefits and Features

  • USB port for connecting to a computer; RS-232 port for connecting to a data logger
  • Rugged, low-cost transceivers
  • Can be used in the field as a transceiver or in the office as the base station
  • Transmits up to one mile with omnidirectional antenna; up to 10 miles with higher gain directional antennas at ideal conditions
  • Settings stored in non-volatile memory
  • Designed for use in PakBus networks
  • Frequency-hops over 25 channels avoids interference from other spread spectrum radios
  • Optional extended temperature testing
  • Faster communication due to elimination of some small "link state packets"
  • Ability to have stand-alone RF router/repeaters (up to 8 repeaters)
  • Greater immunity to interference and RF collisions by using RF retries
  • Reduced power consumption by the data logger, as the radios perform "packet address filtering"
  • Built-in setup menus allow access to advanced functionality

The RF401-series and RF430-series spread-spectrum radios are similar. The models in these two series differ in their ports used for connecting to computers/dataloggers, in their frequencies, and in their transmitting power. Refer to the following table for specifics.

RF401A RF430
RF411 RF411A RF431 RF416 RF432
Frequency 910 to 918 MHz
US & Canada
920 to 928 MHz
Australia & New Zealand
2.450 to 2.482 GHz
USB Ports
CS I/O Ports
RS-232 Ports
Transmitting Power 100 mW 250 mW 100 mW 100 mW 250 mW 100 mW 50 mW 50 mW


Technical Description

The RF432 reduces susceptibility to RF interference from other spread spectrum devices by providing user-selectable frequency hopping patterns. Spread spectrum radios spread the normally narrowband information signal over a relatively wide band of frequencies. This process allows communications to be more immune to noise and  interference from RF sources such as pagers and cellular phones.

RF432 and RF416 Differences

The RF432 radio is functionally the same as the RF416. The difference between the two is that the RF432 has USB and RS-232 ports, while the RF416 has RS-232 and CS I/O ports.


Operating Frequency 2.450 to 2.482 GHz
Radio Type Frequency Hopping Spread Spectrum (FHSS) Transceiver
USB Baud Rate 38.4 k, 19.2 k, 9600, 4800, or 1200 bps

(If an RF432 radio has an operating system prior to OS2, its USB port will only communicate at 38.4 kbps. Therefore, the operating system of an RF432 radio may need to be updated to a newer version if the network will contain data loggers that do not support 38.4 kbps. For example, CR200(X), CR510, CR10X.)
RS-232 Baud Rate 38.4k, 19.2k, 9600, 4800, or 1200 bps
Channel Capacity 65,000 Network Identifiers share 25 hop channels.
Frequency Hopping Patterns 6 different selectable patterns
Receiver Sensitivity -104 dBm at 10-4 bit error rate (Campbell Scientific protocols will issue retries wherever a bit error occurs.)
Interference Rejection 70 dB (at pager and cellular phone frequencies)
Transmitter Power Output 50 mW (nominal)
Antenna Connector Reverse polarity SMA
Power 9 to 16 Vdc
Operating Temperature Range -25° to +50°C
LEDs Power on, TX, RX, diagnostics
RS-232 Connector 9-pin “D” Female (4 wire: Tx, Rx, CTS, GND)
Power Connector Barrel plug, center positive 12 V (used to connect the 14291 Field Power Cable)
Dimensions 11.4 x 7.0 x 2.9 cm (4.9 x 2.8 x 1.2 in.)
Weight 227 g (8 oz)

Average Current Drain

Standby < 1 mA (power-saving options used)
Receiving 40 mA
Transmitting 78 mA


Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.


Product Compatible Note
CR1000 (retired)
CR200X (retired)
CR216X (retired)
CR5000 (retired)
CR9000X (retired) Although compatible, RF432 radios do not support the CR9000(X)'s fastest communication rates, and are therefore not practical for many of their applications.

Additional Compatibility Information


Internal Radio of CR216(X) Dataloggers

The RF432 spread spectrum radio can communicate with the internal spread spectrum radio of our CR216(X) dataloggers. 

Other Spread-Spectrum Radios

The RF432 can be used in networks containing RF416 and RF415 radios. When RF432 radios are used in networks containing RF415 radios, the Protocol must be set to Transparent. Also, if RF415 and RF432 radios will be in the same RF proximity, do not use 28, 44, 52, 56, or 60 for the RF415 Net Address. RF415 radios with Net Addresses of 28, 44, 52, and 56 interfere with RF432 radios with Net Addresses of 0, 1, 2, and 3, respectively. The RF415 Net Address of 60 interferes with all RF432 Net Addresses.

The RF432's 2.4 GHz radio is also a good fit for parallel operation in RF450, 900 MHz networks due to the frequency difference (i.e., 2400 MHz versus 900 MHz).

Campbell Scientific does not recommend using the RF432 in networks containing FGR-115 radios.

Transparent and PakBus Protocols

Do not mix RF432 radios set to the Transparent protocol with RF432 or RF416 radios set to either of the PakBus protocols, since this will produce RF traffic without any RF communications. However radios with the PakBus Aware and PakBus Node settings can coexist in the same network (i.e., some radios set to PakBus Aware and some radios set to PakBus Node).

Data Logger Considerations

If an RF432 radio has an operating system prior to OS2, its USB port will only communicate at 38.4 kbps.  Therefore, the operating system of an RF432 radio may need to be updated to a newer version if the network will contain data loggers that do not support 38.4 kbps (e.g., CR200(X), CR510, CR10X).


RF430 USB Drivers v.2.08.28 (1.64 MB) 05-03-2013

RF430 USB Drivers for the Windows operating system. 32 and 64 bit support for Windows 8, Windows 7, Windows Vista and Windows XP.

Note: Drivers should be loaded before plugging the RF430 into the computer.

FAQs for

Number of FAQs related to RF432: 2

  1. Download the RF430 driver from the Downloads page. 

  2. Antenna selection depends on multiple criteria: 

    • Consider how many stations a particular station needs to communicate with. For remote stations in communication with only one repeater or base station, a directional or Yagi antenna may be an appropriate choice. In contrast, repeater stations that receive data from many different locations will probably require an omnidirectional antenna. 
    • Consider if a high-gain antenna is needed to overcome the path between two points. Higher-gain antennas are larger and more expensive. 

    To help with antenna selection and site placement, consider renting and using a demo kit to test the pathway quality. Campbell Scientific offers a 900 MHz demo kit for the RF401, RF430, CR206X, and AVW206, as well as a demo kit for the RF450. Contact Campbell Scientific for assistance.

Articles and Press Releases

Privacy Policy Update

We've updated our privacy policy.  Learn More

Cookie Consent

Update your cookie preferences.  Update Cookie Preferences