Wireless,Receiver,sensoRAD,DR9021,Wilkerson Instrument

Wireless Receiver sensoRAD™ DR9021

Wireless Receiver

DR9021Wireless,Receiver,sensoRAD,DR9021,Wilkerson Instrument


Wireless,Receiver,sensoRAD,DR9021,Wilkerson Instrument


  • Dual 4/20 mADC Outputs
  • Four Discrete Open Collector Outputs
  • 902 - 928 MHz ISM Unlicensed Band Standard
  • 2.4 GHz Unlicensed Band Available
  • Frequency Hopping, Spread Spectrum Technology
  • User Selectable HOP Sequence
  • Ranges to 20 Miles
  • Convenient DIN Rail Mount
  • 5 Year Warranty (1 Year on Radio Module)
  • UL/cUL Recognized


The DR9021 RF Receiver receives RF signals from the DR9011 Transmitter and reconstructs the analog signals as 4/20 mA outputs.

When the transmitter has a dual channel input, the DR9021 has a 4/20 mA output for each channel. If the transmitter has a single channel analog input, the DR9021 provides two 4/20 mA outputs proportional to the single input.

Switch outputs are provided as discrete optically isolated open collector NPN transistors. A DIP Switch on the PC board allows selection of Normal Acting or Reverse Acting (Failsafe) switch outputs. (see Figure 1)

The radio receives in the 902 to 928 MHz unlicensed ISM band. It uses frequency hopping, spread spectrum technology to allow multiple receivers to work in the same locale without interference. A DIP Switch on the PC board is used to set the hopping sequence.

With proper antenna and cable selection, the DR9021 can receive from a DR9011 up to 20 miles distance.

The DR9021 provides isolation between the output and the power source.

Screw terminal blocks that plug into the case allow easy wiring and removal of products.

All of the DR Series of products provide transient protection to help eliminate damage from lightning and from other transients created on the power and signal leads.


Dual 4/20 mADC

  • 12V Compliance
  • 4 optically isolated NPN transistors


  • 85/240 VAC
  • 2.0 VA Max

12 or 24 VDC

  • 1.5 Watt Max


  • 910 - 917 MHz (Standard)
  • 920 - 927 MHz (Optional)
  • 2.4000 - 2.4835 GHz

Spread Spectrum Type

  • Frequency Hopping, Direct FM
  • 7 Hop Sequences

RADIO (cont)

I/O Data Rate Tx to Rx:

  • Update Rate – 10/S

Range (Line of Sight)

  • 900 MHz -- Up to 20 Mi. with high gain antennas
  • 2.4 GHz -- Up to 10 Mi. with high gain antennas

Receiver Sensitivity

  • -110 dBm @ 9600 baud


  • Reverse Polarity SMA Female


  • RF Module -- FCC Part 15.247
  • DR9021 -- UL/cUL Recognized

NOTE: This unit must be used with a DR9011 wireless transmitter.