Industrial Grade Wireless Temperature Sensor with 9 RTD Sensors

This highly versatile industrial sensor supports 9 miniature, low-mass precision RTD temperature sensors connected to a high-temperature transceiver node in an industrial enclosure.

  • 3-wire RTD connection supports long cables while also maintaining high temperature accuracy.
  • The entire sensor is rated to operate up to at least 125C (257F).
  • Readings as fast as every 3 seconds for each of the 9 sensors.
  • Data logging capability when the transceiver node is not linked to a gateway.



Part of the breakthrough Leap Sensors® system.


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Leap Sensors are specially designed to easily adapt to your specific needs. If this isn’t exactly what you need, please contact us.

9-RTD Wireless Temperature Sensor Specifications

RTD Specifications

  •  Low mass: Utilizes Omega Class A F Series sensor.
    • Thin-film DIN Class A.
    • Size: 2.3 x 2.1 x 0.9 (thick) mm.
    • Rated for temperatures between -50 and 500°C (-58 to 432°F). However, Class A accuracy is assured between -30 to 300°C (-22 to 572°F).
  • 3-wire RTD:  the sensor utilizes a 3-wire configuration to the RTD sensors. The electronics measure and compensate for changes in wire resistance over temperature changes.
  • Long cable lengths to sensors:  The 3-wire RTD temperature sensor design facilitates long cable lengths to the sensors (if needed) while maintaining temperature accuracy.
  • Temperature accuracy:
    • Contact us for application-specific estimates on accuracy.
    • Typical: +/- 0.4C from 25C to 120C.
    • High-accuracy version: +/- 0.1C, or better (over specified temperature span) is available. Contact us for details.
  • Other RTDs can be connected to this board. Contact us for more information.

Sensor Electronics and Battery

  • Electronics operating temperature: 
    • Standard operating temperature: Battery and electronics can operate up to 125C. (Contact us for higher operating range.)
  • Additional on-circuit-board temperature sensor – optional
    • 3-Wire RTD – electronics measure wire resistance to the sensor and compensate for changes in wire resistance over temperature to maintain accuracy over a wide temperature range.
  • Fast temperature sampling time interval:
    • Fastest sampling rate for 9-RTD temperature sensors – all 9 sensors every 3 seconds.
      • Data is typically data-logged with a time stamp on the sensor, then transmitted every 15 to 30 seconds.
    • Sampling as slow as one sensor reading per day.
  • Data logging: Sensor will act as a data logger when gateway is not in range, storing up to 10,000 time-stamped readings on board. See details below.

Leap Wireless Sensor Transceiver Node Specifications

  • Transmission distance to a gateway – typically 200 feet in open air. The sensor transmitter antenna is on the circuit board.
  • 2-way communication with the sensor through the user interface:
    • Name the sensor, set sensor sampling time interval, set wireless transmit time interval, over-the-air firmware updates.
    • Gateways send an acknowledgment to the sensor that the data was received for high reliability.
  • Sensor data logging – When sensors do not receive an acknowledgment from the gateway that the radio transmission was received, the Leap Sensor will store the time-stamped data on-board until the gateway connection is established.
  • Reliable industrial over-the-air radio communication
    • Industry-standard 802.15.4 with Direct Sequence Spread Spectrum (DSSS).
    • Gateway “hand-shake” acknowledgments of successful transmission and sensor data logging for extra reliability.
  • Over-the-air protocol – Standard and established 6LoPan and Thread.
  • Data security – AES encryption.  Standard and established TLS security.
  • FCC certified.
  • Battery – user-replaceable 3.0C or 3.6V batteries.

Leap Wireless Sensors Gateway (Receiver) and User Interface Software

  • See the Leap Sensors gateway page and the Leap Sensors User Interface options page for more detailed information.
  • Leap Sensors wirelessly transmit data to a gateway*.
    • Gateway can support over 250 sensors that are in range. (Additional gateways can extend sensor coverage.)
    • The gateway then passes the data to the Leap user interface software. The user interface software may be hosted on the gateway (and connected to a PC with a USB cable), on the password-protected Leap Sensors Cloud web site, or an on-site server.
  • User interface supports: logging-in, set user rights, view sensor data, set email and text alerts (cloud version), graph sensor data, download data to excel, add or subtract sensors, update firmware, and other functions.

*Custom-ordered leap sensors are available with a direct-to-cellular option where no gateway is needed and the data is sent directly to a cloud server. Contact us for more information.

Patents pending.

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Ideal for these processes:

  • Silicon wafer processing
  • Scientific experiments
  • Paint and coatings curing
  • Temperature profiling over a surface
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