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VH400 - Low-Cost Soil Moisture Sensors Quick view

Reference: VH400-2M

Brand: VEGETRONIX

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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...
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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.
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TRSYS20 Thermal resistance Measuring System MYJ
  • TRSYS20 Thermal resistance Measuring System MYJ
  • TRSYS20 Thermal resistance Measuring System MYJ
  • TRSYS20 Thermal resistance Measuring System MYJ
  • TRSYS20 Thermal resistance Measuring System MYJ

TRSYS20 Thermal resistance Measuring System

TRSYS20

TRSYS20 Thermal resistance Measuring System

TRSYS20 is a high-accuracy measuring system used in determining the in-situ thermal resistance (R-value), thermal conductance (Λ-value), and thermal transmittance (U-value) of building envelope components. The system is mostly used for measurements according to standard practices of ISO 9869, ASTM C1046 and ASTM C1155. TRSYS20 is equipped with high-resolution electronics, two heat flux sensors of model HFP01 as well as two pairs of matched thermocouples for differential temperature measurements.

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Description

Measurand heat flux (2 x) temperature (4 x) temperature difference (2 x) temperature difference (2 x)
TRSYS20 specifications :
Uncertainty of calibration ±3 % (k = 2)
Measurement resolution 0.02 W/m²
Guard width to thickness ratio 5 m/m (as required by ISO 9869 D.3.1)
Accuracy < ± 0.1 °C (as required by ISO 9869, paragraph 5.2)
Measurement resolution 0.02 °C
Thermocouple type IEC 60584-3:2007 type KX
Tolerance class Class II
Required data analysis to determine building R-value and U-value to be performed by the user according to ISO and ASTM standard practices
Standards governing use ISO 9869, ASTM C1046, ASTM C1155
Number of measurement locations 2
Cable length per location location 1: 10 m, location 2: 20 m
Rated operating temperature range HFP01 and TC 30 to +70 °C
Measurement duration range > 3 days
Data storage capacity > 30 days
MCU specifications :
Connection to local area network (LAN) via ethernet or directly to PC via USB
Graphical user interface web page via web browser
Supported web browsers Chrome, Firefox, Internet Explorer, Opera, Safari
Rated operating voltage MCU 10 to 16 VDC
Ingress protection class IP54
PSU specifications :
Input voltage 110-220 VAC, 50 / 60 Hz
Ingress protection class IP22

User interface: MCU as web server
TRSYS20 is controlled via a PC. No software installation is required. The measurement and control unit (MCU) can be connected to a local area network (LAN) via Ethernet or directly to a PC via USB. The MCU provides a graphical user interface in the form of a web page that can be accessed via a web browser. The graphical user interface allows the user to start and stop experiments; monitor heat flux, temperature, and temperature difference measurement data in real time; and review preliminary results.

The system generates a data file containing the measurement time, heat flux, temperature, and temperature difference for the two measurement locations. The data file is stored on the MCU and can be downloaded via the graphical user interface. The user is responsible for data analysis, calculating the R, Λ, or U value of the building envelope according to ISO 9869 or ASTM C1155 standards.

Unique Features and Benefits
Robust and stable
Best documentation – meets ISO and ASTM standards
Temperature difference sensors – tested to 0.1°C accuracy requirements
Simultaneous measurements at two locations
Measures very small heat fluxes
Intuitive and easy-to-use graphical user interface
Connection via Ethernet (LAN) or USB
Waterproof (IP67 rated) and corrosion resistant sensors

Calibration and conformity assessment
Calibration of TRSYS20 components is traceable to international standards. TRSYS20 is delivered with formally traceable calibration certificates. HFP01 heat flux sensors are calibrated according to ASTM C1130. Temperature difference sensors are tested “individually” as matched pairs.

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TRSYS20
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