- Overview
- Specification
- Accessories
- Product Resources How to Buy
- 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
- Less than 40µA idle current
- Operating Temperature Range: –40°C to +80°C
The Tekbox leaf wetness sensor mimics the wetness state of a real leaf. The measurement value is proportional to the percentage of the sensor surface covered with water.
The sensor is equipped with a SDI-12 interface for measurement and calibration.
In case of a standalone application, a built-in temperature sensor can be queried for air temperature measurement. It is however no replacement for a dedicated air temperature sensor / radiation shield set up.
The sensor is ideal for SDI-12 agricultural yield applications.
Specification
GP2 Data Logger – Brief Specs
| Input connections | 12 differential (or 24 single-ended) analog inputs configurable as: Voltage, Resistance (12 3-wire or 24 2-wire), Bridge (12), Potentiometer (12) 4 digital inputs as: Counters, (2 fast + 2 slow), Frequency, Digital state 1 Delta-T WET sensor channel |
| Control outputs | 2 relay outputs expandable to 6 (1 A) |
| Readings stored | 2.5 Million |
| Recording rate | 1 second to 24 hours |
| Configuration | DeltaLINK |
| Communication options | USB, RS232, ethernet or modem |
| Sensor excitation | Calibrated 3V reference, +5 V and +12 V regulated, or 5 to 10.5 V (battery or external power), user selectable |
| Power | 6 AA alkaline batteries or external power 10-15 V DC |
| Battery life (dependent on usage) | >310K readings, lasting 530 days |
| Enclosure rating | IP65 |
| Temperature range | -20 to +60°C |
| Display | – |
| Size | 225 x 185 x 75 mm |
| Typical applications | Demanding research projects |
| Environmental monitoring | |
| Varied control applications |
For full GP2 specification please see the GP2 data sheet
WS-GP2 Sensors – Brief Specs
| Specification | Range / Note | |
| Wind speed AN-WD2 (combined wind sensor) | ||
| Range | 0 to 75 m.s-1 | |
| Accuracy | ± 0.1 m.s-1 | Up to 10 m.s-1 |
| ± 1.1% of reading | Over 10 m.s-1 | |
| Starting threshold | 0.4 m.s-1 | -30°C to +70°C if icing minimal |
| Wind direction AN-WD2 (combined wind sensor) | ||
| Accuracy | ± 4° | mechanical: 0 to 360° electrical: 0 to 356° |
| Starting threshold | 0.4 m.s-1 | -30°C to +70°C (if icing minimal) |
| Rainfall RG2+BP | ||
| Sensitivity | 0.2 mm per tip | up to 360 mm.hr-1 |
| Humidity RHT2nl (combined air temp sensor) | ||
| Accuracy | ± 2% RH | 5 to 95% RH |
| ± 2.5% RH | <5% and >95% RH | |
| Air temperature RHT2nl (combined RH sensor) | ||
| Accuracy | ± 0.1°C | 0 to 70°C |
| Solar radiation ES2 | ||
| Absolute accuracy | ± 5% | At 20°C (optimal conditions) |
| Linearity | ± 1% | 0 to 2 kW.m-2 |
| Soil temperature ST1 | ||
| Accuracy | ± 0.2°C | -10 to +65°C |
| Mast M2-FSG | ||
| 2m mast | With cross arm, stakes, steel guy wires, baseplate and logger canopy | |
Accessories
Hardware
Main components and software
Mountings and enclosures
Installation accessories
Cables and networks
Remote communications
Spares and consumables
Power options
Other
Product Resources
Manuals
- Tekbox Leaf Wetness Sensor Manual 293 KBFilename: Tekbox_Leaf_Wetness_Sensor_Manual
FAQs
- Setting up an M12 cable network to ensure a waterproof and secure connection.
Question
What is the best practice for setting up a M12 cable network to ensure a waterproof and secure connection..
Answer
It applies to:
GP2 for SDI-12 and logger networks.
Celora for SDI-12 networks.
All sensors with M12 connector cables.Examples of SDI-12 network and GP2 logger networks:
DO
When connecting multiple cables and T-piece together, it is essential that any M12 connector is tightened sufficiently:• Ensure internal connector O-ring and opposite sealing face are free from dirt.• Tighten the connector thumbscrews as much as you can by hand or use a torque driver set to 1Nm to be sure. See video:
We recommend the Weidmuller ‚”1900021000″ torque driver:
• This will save lots of painstaking troubleshooting hours if you do have a loose connection and give you piece of mind that all connectors are correctly tightened.
• Untightened connectors can come undone and let water into the cable network which can damage wire cores and cause erroneous readings.
Connect in the office first and then transfer the network to the field. This way, you’re not trying to do it in unpleasant weather and the time pressures are off.
DON’T
Use duct tape. This will hold water against the connector. If tightened correctly, the connector will seal and hold.
Technical Notes
- LWS-SDI-12 application note 106 KBFilename: LWS-SDI-12_application_note