Radon Sensors TSRS (UART) and TSRS2 (RS485 - MODBUS)


Intelligent detectors of radon concentration with simple serial interfaces UART, RS485 - MODBUS 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 and 2 wires for DC powering. Coupled with sensors are delivered descriptions of serial 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. Also is possible to download time´s records of radon concentration and energy spectrum from sensor internal memory.

TSRS sensor with wired serial interface UART is design for direct connection with processor unit for short distance (severel meters). Powering is strictly +5V.

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 +7V to +15V. Communication type and rate is possible to set by external switches as well as bus address of device.

Schematic diagram of TSRS(UART) sensor connection

Schematic diagram of TSRS2 (RS485-MODBUS) sensor bus connection

Product Specification
Average measurement sensitivity 0,25 imp/hod/Bq.m-3
(metoda RaA+RaC; 15°C ÷ 30°C; rel. vlh. 20% ÷ 40%)
Measuring range MDA – 10E6 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)
Radon concentration results display short-term (1 hour moving average)
long-term (24 hours moving average)
Measuring algorithm quicker, less sensitive (calculated from RaA)
slower, more sensitive (calculated from RaA + RaC)
Measuring relative humidity range 10 – 90 %
Measuring temperature range - 20 to + 60 °C
Serial interface UART, RS485-MODBUS
Records saving interval 1- 255 minutes, default 1 hour
Results memory capacity in probe 4096
Powering 5VDC/max. 5mA (UART); 7-15VDC/max. 5mA (RS485)
Dimension Ø 80 x 175 mm


USB<->UART adapter for TSRS

For better SW debugging or possibility to try usbRADONview application.

usb for TSRS


jpg TSRS - Technical Specifications & Operation Manual
zip TSRS - Description of UART communication

Sales Support:
Josef Heřman, +420 266 107 356, +420 737 047 377, herman.josef@tesla.cz

Technical Support:
Ing. Václav Řeřicha, +420 266 107 650, rericha.vaclav@tesla.cz

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