New !
Temperature, Humidity, Pressure Regulators
Carbon Dioxide Concentration Trasmitters
with Relay and RS485 Outputs

humidistat photo

Humidistat H3430, H7430

Humidistats are designed for two-state control of e.g. heating, ventilation, humidifier, dehumidifier, etc.
Transmitter is equipped with two relay outputs for alarm indication or control of external devices. Each relay can be assigned to any measured or computed value. For each relay setting of delay, hysteresis, audible alarm is enabled.
Measured values are converted to galvanically isolated RS485 serial output.

Fully equipped transmitter contains temperature, humidity, pressure sensors.
Measured temperature and relative humidity is recalculated to other humidity interpretations - dew point temperature, absolute humidity, specific humidity, mixing ratio or specific enthalpy.
Reading and pressure output are available in these units: hPa, kPa, mbar, mmHg, inHg, inH2O, PSI, oz/in2. Degrees Celsius and Fahrenheit are user selectable.
Parameters are easy adjustable from regulator keyboard or from the computer.

Large dual line LCD for simultaneous display of temperature, pressure or relative humidity or other calculated humidity interpretation is an advantage.
State-of-the-art capacitive polymer sensor ensures excellent calibration long term stability, inertia against water and condensation. Transmitter is designed for use in non-aggressive environment.
Transmitter is also equipped with three binary inputs for detection of two-state events - e.g. water, smoke, glass break detection, door contact.

HUMIDISTAT APPLICATIONS
- temperature and humidity control
- monitoring of temperature, humidity, pressure and three binary signals at:

Carbon Dioxide concentration transmitters

The CO2 - carbon dioxide level is recently regarded as an important parameter that substantially determines the quality of the interior climate. Especially in buildings where many people gather, such meeting rooms, hospitals, schools, cinemas, theatres and care centres. With the help of CO2 sensor engineers, technical advisors, environmental experts and health specialists can optimize the ventilation for creation of a healthy interior climate.

The CO2 measurement is based on a 2-source, 2-beam process. CO2 measurement with long-term stability is guaranteed thanks to the proven non-dispersive infrared (NDIR) CO2 measurement cell.

The unique patented auto-calibration procedure compensates for aging of the infrared source and guarantees high reliability, long term stability and eliminates the need of periodical recalibration in the field.

APPLICATIONS - online measuring of CO2 level at:

Transmitter is equipped with two relay outputs for alarm indication or control of external devices. Each relay can be assigned to any measured or computed value. For each relay setting of delay, hysteresis, audible alarm is enabled. Parameters are easy adjustable from regulator keyboard or from the computer.

Transmitter contains a microprocessor based control circuitry in a durable plastic case with connection terminals.
The CO2 concentration sensor is built inside the case.
Large dual line LCD is an advantage. Display is possible to switch off. Computerized design ensures maximum long term stability and failure indication.

Measured CO2 concentration values are converted to RS485 serial output. Transmitter circuitry is galvanically isolated from power circuitry to prevent collision in RS485 network.

Serial output RS485 - 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 readings and modify transmitter configuration. Instrument works always in slave mode, i.e. responds only to master device query. Transmitters have the address space available from 1 to 255. Communication speed is 110 to 115200Bd.

For acquiring values from several transmitters connected to RS485 bus, third party software is necessary to use.

Tested functionality is with programs:
LabVIEW from National Instruments, TIRS.NET, ControlWeb, EasyView.
COMMON TECHNICAL PARAMETERS
Maximum switching voltage, current, power of relay output: 50V, 2A, 60VA
Audible alarm: from built-in beeper - switchable
Supported temperature units: degrees Celsius, degrees Fahrenheit
Accuracy of temperature measurement: ±0.4°C from -30 to +100°C, ±0.4% from reading over +100°C
Range of relative humidity measurement: 0 to 100%
Accuracy of relative humidity measurement: ±2.5% relative humidity from 5 to 95% at 23°C
Accuracy of temperature measurement: ±0.4°C from -30 to +100°C
±0.4% from reading over +100°C
Accuracy and measuring range of dew-point temperature:
- for more details see graphs
±1,5 °C at ambient temperature T < 25°C and RH>30%
range -60 to +80 °C
Accuracy and measuring range of absolute humidity: ±3g/m3 at ambient temperature T < 40°C
range 0 to 400 g/m3
Accuracy and measuring range of specific humidity: ±2g/kg at ambient temperature T < 35°C
range 0 to 550 g/kg
Accuracy and measuring range of mixing ratio: ±2g/kg at ambient temperature T < 35°C
range 0 to 995 g/kg
Accuracy and measuring range of specific enthalpy: ± 3kJ/kg at ambient temperature T < 25°C
range: 0 to 995 kJ/kg
Operating temperature range of the case with electronics: -30 to +80°C
Operating temperature range of LCD display: readable up to operating temperature +70°C, it is recommended to switch off LCD over +70°C
Range of temperature compensation of RH sensor: -30 to +125°C
Signal for binary inputs: from voltage-less contact, open collector or two-state voltage signal.
Inputs are not galvanically isolated.
Minimum pulse length at binary input: 500 ms (shorter pulse may not be detected)
Voltage at open contact: 3.3 V
Low voltage level: 0 to +0.2 V
High voltage level: +3.0 to +30V
Filtering ability of sensor cover: 0.025mm - filter from stainless steel mesh
Protection - temperature and humidity transmitters: IP65 electronics with terminals,
IP40 humidity sensors
Protection - transmitters measuring pressure: IP54 electronics with terminals,
IP40 humidity and temperature sensors
Power: 9-30Vdc
Dimensions of the case: 135 x 136 x 45 mm (W x H x D)
Warranty: 2 years
COMMON TECHNICAL PARAMETERS FOR CO2 TRANSMITTERS
Output RS485
Measured Value CO2
Construction Type Ambient Air
Design Industrial
Temperature Measuring Range None
Relay Output Yes
Two-State Input No
Lcd Display Yes
Maximum switching voltage, current, power of relay output 50V, 2A, 60VA
Audible alarm from built-in beeper - switchable
Range of CO2 concentration measurement 0 to 2000ppm
Accuracy of CO2 concentration measurement ±(50ppm +2% from reading) at 25°C and 1013hPa
Optional range of CO2 concentration measurement 0 to 10000ppm ±(100ppm +5% from reading) at 25°C and 1013hPa
Temperature operating range -30 to +60°C
Measuring interval of CO2 15s
Communication protocol ModBus RTU and Advantech ADAM compatible protocol
Communication speed 110 to 115200 Bd
IP protection IP30
Power 9-30Vdc, power consumption approximately 1W
Dimensions 136 x 150 x 45 mm (W x H x D)
Weight approximately 360g
Warranty 2 years

Humidistats are available in the following models:

ModelMeasured valueMaximum measuring rangesStem lengthOutputOther outputDescription

H0430

humidistat larger photo
temperature+
3binary inputs
-30 to +80°C 53mm 2xRelay RS485 Ambient temperature thermostat. Outdoor indoor.

H4431

humidistat larger photo
temperature+
3binary inputs
-200 to +600°C - 2xRelay RS485 Temperature transducer for
RTD Pt1000probes
(not included).
Accuracy of the input without probe +/-0,2°C

H3430

humidistat larger photo
temperature+
humidity+
3binary inputs
-30 to +80°C 75mm 2xRelay RS485 Outdoor, indoor.

H3431

humidistat larger photo
temperature+
humidity+
3binary inputs
-30 to +105°C* probe incl. cable probe cable 1,2,4m 2xRelay RS485 T+RH probe with 1m cable. Cable lengths 2m or 4m available optionally.

H3433

humidistat larger photo
temperature+
humidity+
3binary inputs
-30 to +125°C* 150mm 2xRelay RS485 Duct mount.

H7430

humidistat larger photo
temperature+
humidity+
atm.pressure+
3binary inputs
-30 to +80°C 75mm 2xRelay RS485 Outdoor, indoor.
Reading and pressure output 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.

H7431

humidistat larger photo
temperature+
humidity+
atm.pressure+
3binary inputs
-30 to +105°C* probe incl. cable probe cable 1,2,4m 2xRelay RS485 T+RH probe with 1m cable. Cable lengths 2m or 4m available optionally. Pressure sensor is located in the control unit with display.
Reading and pressure output 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.

CO2 concentration transmitters are available in the following models:

ModelMeasured valueMaximum measuring rangesStem lengthOutputOther outputDescription

H5424

co2 larger photo
Carbon Dioxide 0 to 2000ppm - 2xRelay RS485 Included in delivery:
-Traceable calibration certificate

-Quick start manual

-Free program TSensor for configuring of the transmitter is ready to Download

-Free program SensorReader for logging values from one transmitter via RS485 to a PC disk file is ready to Download

Sensor - manual in pdfManual in pdf

Sensor - manual in pdfDescription of communication protocol in pdf

CO2 - datasheetCarbon Dioxide datasheet in pdf

* Relative humidity at temperature over +85°C is limited in accordance with the graph. Near plastic case with electronics and probe cable maximum temperature is +80°C.

humidistat working range
Figure: Humidistat working range


Serial output RS485 is galvanically isolated from other circuitry to prevent collisions on the RS485 bus. 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 readings and modify transmitter configuration. Instrument works always in slave mode, i.e. responds only to master device query. Transmitters have the address space available from 0 to 255. Communication speed is 110 to 115200Bd.

Free program SensorReader for logging values from one transmitter via RS485 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.

Included accessories:

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.

Free program TSensor for configuring of the transmitter is ready to download.


For acquiring values from several transmitters connected to RS485 bus, third party software is necessary to use. Tested functionality is with programs:

LabVIEW from National Instruments, TIRS.NET, ControlWeb, EasyView.

HUMIDISTAT OPTIONAL ACCESSORY
Larger photo of humidity transmitter cover F5200 grey sensor cover with filter from stainless steel mesh, filtering ability 0,025mm
Larger photo of humidity transmitter cover F5200B black sensor cover with filter from stainless steel mesh, filtering ability 0,025mm
Larger photo of humidity transmitter cover F0000 sintered bronze sensor cover. Filtering ability 0.025mm.
Larger photo of humidity transmitter flange PP4 flat plastic circular flange for duct mounting
Larger photo of humidity transmitter flange PP90 right-angled stain-less steel flange for wall mounting
Larger photo of humidity transmitter gland SP004 plastic gland for direct mounting of the humidity probe to a 29 mm diameter hole
Larger photo of humidity transmitter Dual Lock MD036 self adhesive Dual Lock for easy installation
Tool for easy transmitter connection - larger photo SP006 Tool for easy wire connection to terminals
Larger photo of adapter for hygrometer A1510 adapter 230V-50Hz/12Vdc
Solar radiation shield F8000 Solar radiation shield for transmitters H3431, H7431 with T+RH probe on a cable
humidity calibration accessory for calibration and adjustment of humidity by the user

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data acquisition Transmitters with 4-20mA and RS485 outputs are directly compatible with sixteen channel Comet data acquisition system MS.

Sensor - manual in pdfManual in pdf

Declaration of conformity in pdf formatDeclaration of conformity in pdf format