TSR4 for continuous measurement of radon concentrations in buildings
The portable probe base is a measuring chamber with a semiconductor photodetector. Radon enters the chamber by diffusion through the input filter on the underside of the probe. The probe measures autonomously and continuously. It processes the results in an interval of 4 minutes and counts the short-term moving average of the radon concentration (1 hour moving average - average of 15 4-minute process intervals). The device also counts the long-term moving average radon concentration (24-hour moving average).
Data storage and transmission
The probe stores time records of these radon concentration values including humidity and temperature values in its internal memory (typically at 1 hour intervals). In addition, the time recording values of the energy spectrum measurement (typically at 12 hour intervals) are measured. The resulting values can be downloaded continuously during the measurement or at the end of the measurement. The radon probe data can be transferred directly to a PC via the USB interface or wirelessly via antenna and central unit. The central unit is not included with TSR3 and is sold and delivered separately.
Positioning
The probe can be positioned anywhere, but generally it is placed on the ground for measurement. Do not cover the bottom of the probe.
Versions
Compared to the TSR4 you get a screen with the TSR4D. This enables a quick overview of the measured values.
Technical product information
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Average measurement sensitivity |
0,25 count/hour/Bq.m-3 (method RaA+RaC; 15°C ÷ 30°C; rel. hum. 20% ÷ 40%) |
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Measuring range |
MDA - 100 000 Bq/m3; MDA = 100 Bq/m3 per 1 hour or 20 Bq/m3 per 24 hours |
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Measurement uncertainty |
< 13% at 300 Bq/m3 per 1 hour; < 3% at 300 Bq/m3 per 24 hours |
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Measuring chamber capacity |
0,176 dm3 |
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Response rate |
< 30 minutes (RaA); < 3 hours (RaA + RaC) |
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Radon records |
calculated from RaA (quicker, less sensitive) calculated form RaA + RaC (slower, more sensitive) |
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Measuring relative humidity range |
10 - 90 % |
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Measuring temperature range |
-20 to + 60 °C |
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Radio interface |
868MHz |
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Max number of measuring network elements |
16 |
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Probe to terminal unit distance (RF range) |
depends on number of walls and building material, up to 600 m in open space |
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Possibility of using repeater for RF range extending |
yes |
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Results reading interval (from probe) |
240-65535 sec (4 min - 18.2 hours) |
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Records saving interval (probe) |
1- 255 minutes, default 1 hour |
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Results memory capacity in probe |
4096 (150 days of 1 hours records) |
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Powering |
internal rechargeble accumulator; charging via USB |
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Accu life after full charging |
>1 year |
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Current radon concentration results |
short-term (0,5 hour running average from RaA) long-term (24 hours running average from RaA + RaC) |
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Dimension |
Ø 80 x 175 mm |
Radon probe variants
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Probe Type |
Connection |
Display | Larger Storage | Ventilation Triggering | ||
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TSR4 |
USB |
WLAN 868 MHz |
x |
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TSR4D |
USB |
WLAN 868 MHz |
x |
x |
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TSR4M |
USB |
x |
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TSR4DM |
USB |
x |
x |
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TSR4S |
USB |
SIGFOX |
GPS |
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TSRE1 |
Ethernet |
MODBUS TCP/IP |
Wi-Fi |
x |
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TSRS |
UART |
RELAY |
x |
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TSRS2 |
RS-485 |
MODBUS RTU |
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