Interior temperature, humidity, barometric pressure sensor with serial RS485 output
- temperature
- relative humidity
- dew point temperature
- absolute humidity
- specific humidity
- mixing ratio
- specific enthalpy
- barometric pressure
Online temperature, humidity, barometric pressure transmitters are designed for use in exacting interiors in building energy management and HVAC systems. Are designed for easy installation on ordinary KU68 wiring boxes for household switches and sockets.
Large dual line LCD for simultaneous display of temperature, humidity or barometric pressure is an advantage. Display is possible to switch off.
Computerized design ensures temperature compensation of the humidity and pressure sensors and fail indication. Transmitters are designed for use in non-aggressive environment.
Measured value is converted to digital serial output with the RS485 link parameters. Transmitter circuitry is galvanically isolated from power circuitry to prevent collision in RS485 network. The transmitter works with ModBus RTU communication protocol or with Advantech ADAM compatible protocol. Protocol is user selectable in special configuration mode by means of the PC. Serial link enables to read actual online readings and modify transmitter configuration. Sensor works always in slave mode, i.e. responds only to master device query.
Ask more information on availability of other communication protocols.
APPLICATIONS
- online temperature, humidity and pressure at:
- residential and official buildings
- building energy management and HVAC systems
- building automation
- pharmaceutical industry
- museums, archives, galleries
| TECHNICAL PARAMETERS | |
|---|---|
| Operating temperature range: | 0 to +50°C |
| Operating relative humidity range: | 5 to 95%RH |
| Accuracy of temperature output: |
±0.5°C, range 0 to 50°C user selectable degrees Fahrenheit |
| Measuring range of relative humidity: | 5 to 95%RH |
| Accuracy of relative humidity measurement: |
±2.5%RH from 5 to 60%RH ±3.0%RH from 60 to 95%RH at 23°C |
| Accuracy and range of dew point temperature output:
- for more details see graphs |
±1,6°C at ambient temperature T<25°C and RH>30% range -60 to +80 °C |
| Accuracy and range of absolute humidity output: | ±3g/m3 at ambient temperature T < 40°C range 0 to 400 g/m3 |
| Accuracy and range of specific humidity output: | ±2g/kg at ambient temperature T < 35°C range 0 to 550 g/kg |
| Accuracy and range of mixing ratio output: | ±2,2g/kg at ambient temperature T < 35°C range 0 to 995 g/kg |
| Accuracy and range of specific enthalpy output: | ±3,5kJ/kg at ambient temperature T < 25°C range: 0 to 995 kJ/kg |
| Temperature compensation range: | 0 až +50°C |
| Accuracy and range of barometric pressure measurement: |
± 1,3hPa at 23°C range: 600 to 1100 hPa |
| Communication protocol: |
ModBus RTU and Advantech ADAM compatible protocol
Description of communication protocols in pdf format
|
| Communication speed: | 110 to 115200 Bd |
| Power: |
9-30Vdc, current consumption approximately 6mA |
| Dimensions: | 88 x 106 x 33 mm |
| Material of the case: | ABS |
| Color: | white |
| Protection: | IP20 |
| Warranty: | 2 years |
| SENSORS WITH RS485 OUTPUT | |||
|---|---|---|---|
| Communication circuitry is GALVANICALLY ISOLATED from power circuitry to prevent collision in RS485 network | |||
| Type | Measured value | Description | |
T0418
|
temperature | Air temperature transmitter | |
T3418
|
temperature humidity |
Air temperature and humidity transmitter
Measured temperature and relative humidity are converted to other humidity interpretation - dew point temperature, absolute humidity, specific humidity, mixing ratio or specific enthalpy. |
|
T7418
|
temperature humidity barometric pressure |
Air temperature, humidity, pressure transmitter
Measured temperature and relative humidity are converted to other humidity interpretation - dew point temperature, absolute humidity, specific humidity, mixing ratio or specific enthalpy. Display reading and pressure output is user selectable in these units: hPa, kPa, mbar, mmHg, inHg, inH2O, PSI, oz/in^2 Barometer enables to measure sea level pressure by setting of correction to altitude above sea level. |
|
Instruction Manual for all sensors
|
Included accessory:
Traceable calibration certificate from the manufacturer, instruction manual.
Calibration certificate with declared metrological traceability of etalons is based on requirements of EN ISO/IEC 17025 standard.
Example of calibration certificate.
TSensor - freeware for online configuring of the transmitter is ready to download.
SensorReader - freeware for online logging values from one transmitter to a PC disk file is ready to download. Program enables to alarm acoustically the PC user if adjusted alarm limits are exceeded. Recorded values in CSV format are easy to process in e.g. Excel. Program can be started several times on a computer at the same time to monitor values from several transmitters.
For online acquiring values from several transmitters, third party software is necessary to use. Tested functionality is with programs:
LabVIEW from National Instruments, by means of the free Modbus Library for LabVIEW.
For viewing of online values and graphs from Tx418 transmitters following example of application was created in LabVIEW 8.5 :
RS232-485.vi
TIRS.NET - transmitters are also directly supported by program TIRS.NET from Coral s.r.o. company. Please download demo enabling full work with transmitters.
Tested functionality is also with programs:
ControlWeb,
EasyView.
Online transmitters Tx418 are directly compatible with sixteen channel Comet data acquisition system MS.
Declaration of conformity in pdf format