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V1.2
TBSLWS1
Mimics the wetness state of a real leaf
Measurement range: 0 %to 100%
Measurement response: 1 sec
SDI-12 Standard V1.3
Plug and Play
6 - 16V supply voltage
© 2014 Tekbox Digital Solutions
50/11 Truong Son, F2 | Q. Tan Binh | Ho Chi Minh City | Tel +84 (83)5471340 | E-mail office@tekbox.net| www.tekbox.net
SDI-12 Leaf Wetness Sensor
TBSLWS1 SDI-12 Leaf Wetness Sensor
Less than 40µA idle current
Operating Temperature Range:
- 40°C ... + 80°C
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Table of Contents
Related Manuals for Tekbox TBSLWS1
Summary of Contents for Tekbox TBSLWS1
- Page 1 SDI-12 Standard V1.3 Plug and Play 6 - 16V supply voltage © 2014 Tekbox Digital Solutions 50/11 Truong Son, F2 | Q. Tan Binh | Ho Chi Minh City | Tel +84 (83)5471340 | E-mail office@tekbox.net| www.tekbox.net...
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Page 2: Table Of Contents
Figure 1 – TBSLWS1 measurement output during rainfall and consecutive drying phase Figure 2 – TBSLWS1 and other sensors with SDI-12 interface connected to TBS03 SDI-12 to USB converter; setup for controlling / testing sensors and for PC based data recording Figure 3 –... -
Page 3: Introduction
1 Introduction The graph below shows the output of the TBSLWS1 leaf wetness sensor. When the sensor is dry, the output value delivered upon a SDI-12 measurement command is 0% or very close to zero. When rain drops hit the surface of the sensor, the measurement response will be anywhere between 0% and 100%, depending on how much of the sensor area is covered with water drops. - Page 4 The TBSLWS1 comes factory calibrated and does not need any user calibration. The TBSLWS1 is air / water calibrated. For air calibration, the dry sensor is placed in a way that its surface is not touched by any object. Then issue the air calibration command. For water calibration, the complete sensor surface is submerged in water and then the calibration command is issued.
- Page 5 SDI-12 Leaf Wetness Sensor The TBSLWS1 is compatible with any data logger or remote telemetry unit with SDI-12 interface. Refer to the data logger or RTU manual and to chapter 7 and 8 of this datasheet. Chapter 7 refers to the electrical installation;...
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Page 6: Application Examples
TBSLWS1 and other sensors with SDI-12 interface connected to TBS03 SDI-12 to USB converter; setup for controlling / testing sensors and for PC based data recording Figure 3 – TBSLWS1 and other sensors with SDI-12 interface connected to Remote Telemetry Unit or Data Recorder... -
Page 7: Mechanical Dimensions
V1.2 TBSLWS1 SDI-12 Leaf Wetness Sensor 8 Mechanical Dimensions Cable Color Signal Assignment SDI-12 Power Blue SDI-12 Data Black GND / Shield Table 1 – Cable Connection... - Page 8 V1.2 TBSLWS1 SDI-12 Leaf Wetness Sensor Following standard SDI-12 commands are supported by the TBSLWS1: Command Description Response Acknowledge Active a<CR><LF> 013TEKBOXVNTBSAB21.0000005xxxxx<CR><LF> Send Identification With xxxxx representing the serial number b<CR><LF> aAb! Change Address Changing the sensor address from a to b Address Query a<CR><LF>...
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Page 9: Ordering Information
Delay (ttt) in seconds and number of values (4) Measures board temperature [°C/F] and calculates CRC Upon issuing the aD0! Command, the TBSLWS1 will send aD0! Get Measurement Result(s) the measurement results. The response format depends on the measurement command issued before. -
Page 10: History
V1.2 TBSLWS1 SDI-12 Leaf Wetness Sensor 12 History Version Date Author Changes V1.0 24.06.2014 Mayerhofer Creation of the document Correction of temperature calibration command: sign V1.1 17.10.2014 Mayerhofer added V1.2 18.02.2015 Mayerhofer Corrections Table 5 – History...
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