TESLA Radon Sensor "TSRS (UART)" and "TSRS2 (RS485 - MODBUS)"

Item number: TSRS

714,00 €

including 19% VAT. , no shipping costs

Shipping time: 10 - 11 workdays


TESLA Radon Sensor "TSRS (UART)" and "TSRS2 (RS485 - MODBUS)"

Intelligent detectors of radon concentration with simple serial interfaces UART, RS485 - MODBUS and RELAY for easy implemention into third party system. Suitable for integration into smart buildings, industrial systems and systems of air quality. Connection of probe is always by 4 - wires, 2 wires are for serial half-duplex data or for relay and 2 wires for DC powering. Coupled with sensors are delivered descriptions of interfaces and protocols for easy development and implementation of processor program. Current values of radon concentration, temperature and humidity are possible to read from sensors and also set limit for switching of alarm relay. Also is possible to download time records of radon concentration and energy spectrum from sensor internal memory.

Radon Sensor TSRS

TSRS sensor has alarm RELAY and wired serial interface UART. RELAY is design for remote alarm signalization of crossing radon limit over 4-wires cable (severel 100 meters). UART interface is design for direct connection with processor unit for short distance (severel meters) over 4 –wires cable too. Powering from +5VDC to +12VDC.

Radon Sensor TSRS2

TSRS2 sensor with wired serial interface RS485 is design for bus connection of more sensors with processor unit for long distance (severel 100 meters). Powering is in range +7VDC to +15VDC. Communication type and rate is possible to set by external switches as well as bus address of device.

Technical Data

Average measurement sensitivity

0,25 imp/hod/Bq.m-3
(method RaA+RaC; 15°C ÷ 30°C; rel. hum. 20% ÷ 40%)

Measuring range

MDA - 100 000 Bq/m3;
MDA = 100 Bq/m3 per 1 hour or 20 Bq/m3 per 24 hours

Measurement uncertainty

< 13% at 300 Bq/m3 per 1 hour;
< 3% at 300 Bq/m3 per 24 hour

Measuring chamber capacity

0,176 dm3

Response rate

< 30 minutes (RaA); < 3 hours (RaA + RaC)

Measuring algorithm

quicker, less sensitive (calculated from RaA)
slower, more sensitive (calculated from RaA + RaC)

Radon concentration results display

short-term (1 hour moving average)
long-term (24 hours moving average)

Measuring relative humidity range

10 - 90 %

Measuring temperature range

-20 to +60 °C

Serial interface


Switching load of alarm relay

250W DC/ 500W AC

Records saving interval

1- 255 minutes, default 1 hour

Results memory capacity in probe



5-12VDC/max. 5mA (UART); 7-15VDC/max. 5mA (RS485)


Ø 80 x 175 mm

Scope of Delivery

  • TSRS / TSRS2 Radon Sensor
  • TSRS: 2 opposite cable connectors for sensor connector
  • TSRS2: Opposite cable connector into sensor connector
  • Install cover
  • Install holder of probe
  • Operation Manual


Type approval certificate


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