RTD,Input,Wireless,Transmitter,sensoRAD,DR9011-03,Wilkerson Instrument

RTD Input Wireless Transmitter sensoRAD™ DR9011-03

  RTD Input Wireless Transmitter

DR9011-03RTD,Input,Wireless,Transmitter,sensoRAD,DR9011-03,Wilkerson Instrument


RTD,Input,Wireless,Transmitter,sensoRAD,DR9011-03,Wilkerson Instrument


  • Direct 3 Wire RTD Input - Linearized Output
  • Four Discrete Inputs
  • 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 DR9011 is an RF transmitter that will accept both analog and switch contact inputs. A 12 bit A/D converter is used to digitize the analog data. Analog data and switch status is then transmitted to the companion DR9021 Receiver where the analog signals are reconstructed as 4/20mA outputs and switch status is reconstructed as optically isolated NPN transistor outputs.

The switch inputs require a standard contact closure or an open collector NPN transistor.

Two different RF modules, which operate on different frequencies, are available for the 900 MHz band. Each has 7 hop sequences. With this choice, a total of 14 hop sequences are available.

The radio transmitter outputs 100mW (20 dBm) in the 902 to 928 MHz unlicensed ISM band. It uses frequency hopping, spread spectrum technology to allow multiple transmitters 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 DR9011 can transmit up to 20 miles line of sight.

The DR9011 provides isolation between analog inputs, output, and power source. The isolation makes the product useful for measuring input signals with high common mode voltages and for breaking ground connections to eliminate ground loops.

Switch inputs pull a DC current through the LED of optoisolators. The excitation current is taken from the DC power source. The power source is isolated from the overall circuit by a transformer coupled power supply.

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.


100 Ohm Platinum RTD, 3 wire

  • .00385 or .00392 alpha


  • -200 to +850°C Maximum
  • 15°C Span Minimum


  • ±0.1% of span


  • ±0.05% of span


  • 80 dB, DC to 60 Hz

Switch Input

Open Circuit Voltage

10 to 30 VDC

Closed Circuit Current

3 to 9 mA


  • -13°F to 167°F/-25°C to 75°C


  • ±(0.01% of span)/°C max


  • 10 to 30 VDC, 12VDC, or 24VDC 1.5 Watts Max


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

Spread Spectrum Type

  • Frequency Hopping, Direct FM
  • 7 Hop Sequences

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 (900 MHz)
  • -105 dBM (2.4 GHz)

Transmitter Power:

  • 100 mW (20 dBm)


  • Reverse Polarity SMA Felmale


  • RF Module -- FCC Part 15.247
  • DR9011 UL/cUL Recognized

Note: This unit must be used with a DR9021 wireless receiver.