VH400 Soil Moisture Sensor Probe Specifications
Power consumption: < 13mA
Supply Voltage: 3.5V to 20 VDC.
Dimensions See drawing.
Power on to Output stable: 400 ms
Output Impedance: 10K ohms
Operational Temperature: -40ºC to 85ºC
Accuracy at 25°C: 2%
Output: 0 to 3V related to moisture content
Shell Color: Red
Voltage Output Curves: Curves, Piecewise...
A miniature, value-priced, waterproof data logger for temperature and light monitoring applications; stores 52K measurements.
IMPORTANT INFORMATION
Requires HOBOware software and either an Optic USB Base Station or a HOBO Waterproof Shuttle (U-DTW-1).
HOBOware Pro is required when using the HOBO Waterproof Shuttle. See compatible items below.
Description Depending on the device version, the multi-sensor measuring device records the measured variables CO2 (0-2000/5000/10000 ppm), air quality VOC (low/med/high), relative humidity (0-100% RH) and temperature (0...+50°C). The transmitter converts the measured values into a standardized, analog output signal 0-10 V. As an option, the measuring device has a backlit display or LED traffic light and potential-free changeover contact. The CO2 concentration is visualized via the LED traffic light (green/yellow/red). The version with a backlit LCD display shows the measured values and min/max values of CO2, VOC, relative humidity and temperature. The switching function of the changeover contact can be defined to one of the measured variables using a DIP switch and the switching threshold can be set using a potentiometer. The CO2 concentration is measured using a non-dispersive infrared sensor (NDIR). There are 3 different CO2 scales 0-2000 ppm, 0-5000 ppm, 0-10000 ppm to choose from. The air quality is measured by a VOC sensor and detects the pollution of the ambient air by volatile organic substances such as breathing air, cigarette smoke, body vapours, material emissions, etc. The device has the setting options "low", "medium" or "high" for VOC sensitivity ". The humidity and temperature are measured by a digital sensor, which guarantees a highly accurate and long-term stable measurement result. 16 scalings are available as temperature output. The humidity output signal can be determined from the four measured variables% r.h., g / m³, g / kg and dew point temperature. The measuring device carries out an automatic calibration for CO2 and VOC at regular intervals, which ensures long-term stable measurement. This can be deactivated if necessary or performed manually on the device at any time. In addition, the measuring device has a heating function for sensor protection in the high humidity range of 95 ... 99% r.h. If the relative humidity exceeds the threshold value set ex-works for a certain period of time the heating function is activated. The sensor is heated for a limited time, thus dried and protected from condensation. During the heating and subsequent temperature compensation phase, the output signal is kept stable at the last measured value before the protective function was activated. The modern room housing has a quick-release fastener, extra-large ventilation slots, thermal decoupling and much more. The multi-sensor measuring device is ideally suited for use in workplaces, schools, living rooms, medical facilities.
Technical data
Measurement range temp.:
0...+50°C
Measurement range abs. humidity:
0-50 g/m³, 0-80 g/m³ (calculated) selectable by DIP switch
Measurement range CO2:
0-10000 ppm, scales: 0-2000/5000/10000 ppm
Measurement range air fuel ratio:
0-50 g/kg, 0-80 g/kg (calculated) selectable by DIP switch
traffic light display for CO2 with 3 LEDs (green/yellow/red), optional LCD display with backlight on/off/auto
Automatic calibration:
The automatic CO2/VOC calibration takes place every 7 days, this compensates for any drifts and achieves excellent long-term stability. To ensure this function, the device must be supplied with power for at least 7 days without interruption and ventilated once with fresh air (CO2 300...400 ppm) for approx. 10 minutes within this period. For the CO2 calibration, the device saves the minimum CO2 value measured during this period internally. After 7 days, this minimum value is normalized to 400 ppm CO2 and the output signal corrected accordingly. The maximum correction is limited to half of the determined drift. If the measured value falls below approx. 300 ppm, the calibration is initialized to 400 ppm. The automatic calibration can be deactivated and performed manually if necessary.
Pressure dependency:
CO2: 0,16% f. mv/hPa
Running-in time:
10 min
Initial operation:
After switch-on of the device follows a self-test and the tempering, which takes ca. 10 minutes depending on the environmental conditions. At this time the analogue output drifts from the actual measurement value.
Cable gland:
on the back or housing side (predetermined breaking point)
Housing:
ABS polyman, colour signal white like RAL 9003
Dimensions:
Housing: L 82 x W 82 x H 25 mm
Protection type:
IP30, IP20 (with display)
Protection class:
III
Working range r.H.:
0...98% r.H. in contaminant-free, non-condensing air
Working temperature:
0...+50°C
Manual calibration:
The manual CO2 calibration of the output signal to 400 ppm (zero point) is started by pressing the button on the circuit board (hold it down for approx. 5 seconds until the LED flashes). Before that, continuous operation of min. 10 minutes in fresh air. The LED is deactivated after successful calibration. The manual VOC calibration of the output signal to 1V (zero point) is started by pressing the button on the circuit board (hold down for approx. 5 seconds until the LED flashes). Before that, continuous operation of min. 2 hours with air defined as normal air quality. The LED is deactivated after successful calibration.
Storage temperature:
-20...+50°C
Installation:
on-wall or on flush-mounted box
Approvals:
CE, EAC, RoHS
Product Details
FS4083-U-A2H1T1-X
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Advantage:
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Records of all minimum and maximum values along with time and date of their recordings
Application examples：
Country house
Courtyard
Private meteorological application
Garden
Feature
Message alarm if user-defined max/min values are exceeded.
Get real-time data by dialing a user's phone.
The device will send a GSM alarm to the user's mobile phone when it is powered off.
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Please ask for quotation.
FEATURES
Temperature compensation.
Multiple signal output options.
Fast response.
Excellent stability.
High sensitivity.
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Channels: CO2 Concentration, Temperature, Humidity
Range:CO2: 0 to 9999ppm
Temperature: -25 to 70°C
Humidity: 0 to 99%RH(-20°C~)
Comm Interfaces: USB, Short Range Wireless
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