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VH400 - Low-Cost Soil Moisture Sensors Quick view

Reference: VH400-2M

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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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U3631G IoT Wireless Temperature and Relative Humidity Datalogger with connector for other temperature probe
  • U3631G IoT Wireless Temperature and Relative Humidity Datalogger with connector for other temperature probe
  • U3631G IoT Wireless Temperature and Relative Humidity Datalogger with connector for other temperature probe
  • U3631G IoT Wireless Temperature and Relative Humidity Datalogger with connector for other temperature probe
  • U3631G IoT Wireless Temperature and Relative Humidity Datalogger with connector for other temperature probe
  • U3631G IoT Wireless Temperature and Relative Humidity Datalogger with connector for other temperature probe

U3631G IoT Wireless Temperature and Relative Humidity Datalogger with connector for other temperature probe

U3631G

 U3631G IoT Wireless Temperature and Relative Humidity Datalogger with connector for other temperature probe

GSM datalogger is designed to record temperature and humidity from built-in sensors and temperature from external probe. In case of exceeded set limits, SMS and JSON messages can be sent via 4G data connection. Measured values can be sent to the internet storage COMET Cloud, which is a complete monitoring, alarm and analysis system.

It is also possible to set the regular sending of JSON messages to COMET Database, the sending interval is adjustable. Alarms are also indicated locally by LED, LCD and acoustically by built-in beeper.
The recording is performed in a non-volatile electronic memory. The data can be transferred to a PC via included USB-C cable.

GSM recorder includes Traceable calibration certificate with declared metrological traceability of etalons is based on requirements of EN ISO/IEC 17025 standard.

Quantity

Description

Technical data

Measured value

Temperature

Relative humidity

Counted values (dew point…)


TEMPERATURE SENSOR

Measuring range -20 to +60 °C
Accuracy ±0.4 °C
Resolution 0.1 °C


TEMPERATURE SENSOR - external probe Pt1000


Measuring range -90 to +260 °C
Accuracy ±0.2 °C (-50 to +100 °C);
±0.2 % from reading from +100 to +260 °C;
±0.4 % from reading from -90 to -50 °C
Resolution 0.1 °C


HUMIDITY SENSOR

Measuring range 0 to 100 % RH
Accuracy ± 1.8 % RH
Resolution 0.1% RH


DEW POINT


Measuring range -90 to +60 °C
Accuracy ±1.5 °C at ambient temperature T <25 °C and RH >30 %
Resolution 0.1 °C
GSM MODEM PARAMETERS
LTE Cat 1 LTE FDD/GSM/GPRS/EDGE
Supported network types GSM/GPRS/EDGE 900/1800 MHz
LTE FDD B1/B3/B5/B7/B8/B20



GENERAL TECHNICAL DATA

  • Operating temperature: -20 to +60 °C
  • Channels: internal temperature and humidity sensor, 1x external temperature probe
  • Memory: 500,000 values in noncyclic logging mode; 350,000 values in cyclic record mode
  • Recording interval to the internal memory adjustable from: 1 second to 24 hours
  • Recording interval to the COMET Cloud from: 5 minutes
  • Interval for measuring and evaluating alarms adjustable: 1 s, 10 s, 1 min
  • Recording mode noncyclic: - data logging stops after filling the memory cyclic - after filling memory oldest data is overwritten by new
  • Real time clock: year, leap year, month, day, hour, minute, second
  • Power rechargeable: Li-Ion battery A8200, 3.6V/5200mAh
  • Protection class: IP67 electronics; IP30 sensors
  • Dimensions: 61 x 93 x 53 mm, with antenna 120 x 93 x 53 mm
  • Weight (including batteries): approx. 260 g
  • Warranty: 3 years
Product Details
U3631G
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