Leaf Wetness Data Logger

The OM-CP-LF101A-KIT is a complete data logging system that accurately measures and records leaf wetness. Not only does it record the presence of water but also logs the amount of water on the sensor. The sensor responds to environments the same way a real leaf does and can also detect when ice is present. This low cost system comes complete with a data logger, weatherproof enclosure and leaf wetness sensor.

The OM-CP-LF101A-KIT is ideal for plant disease forecasting, irrigation studies and monitoring frost cycles. It features a multiple start/stop function, ultra-high speed download capability, 1,000,000 reading storage capacity, optional memory wrap, battery life indicator, optional password protection, programmable alarms and more. An OM-CP-IFC200 interface cable and software package is required for use with the OM-CP-LF101A-KIT. The storage medium is non-volatile solid state memory, providing maximum data security even if the battery becomes discharged. The device can be started and stopped directly from your computer and its small size allows it to fit almost anywhere.

Specifications
DATA LOGGER
Measurement Range:
  Dry: 266 mV typical
  100% Saturated: 833 mV typical
Resolution: 50 µV
Accuracy: ±0.1 mV
Specified Accuracy: Nominal range @ 25ºC
Temperature Effect on Span/Offset:
<25 µV over -40 to 80ºC (-40 to 176ºF)
Probe Measurement Time: 10 ms
Probe Power: 2.5 Vdc @ 2 mA to 5 Vdc @ 7 ma
Reading Rate: 4 Hz to 1 every 24 hrs
Memory: 1,000,000 readings; software configurable memory wrap;
330,000 readings in multiple start/stop
Wrap Around: Yes
Start Modes:
  • Immediate start
  • Delay start up to 24 months
  • Multiple pushbutton start/stop
Stop Modes:
  •Manual through software
  • Timed (specific date and time)
Multiple Start/Stop Mode: Start and stop the device multiple times without having
to download data or communicate with a PC
Multiple Start/Stop Mode Activation:
  To Start the Device:
  Press and hold the pushbutton for 5 seconds, the green LED will flash during this time;
  the device has started logging
  To Stop the Device:
  Press and hold the pushbutton for 5 seconds, the red LED will flash for three seconds
  and then the green LED will flash for two seconds; the device has stopped logging
Real Time Recording: The device may be used with PC to monitor and record data in real-time
LED Functionality:
  Green LED Blinks: 10 second rate to indicate logging, 15 second rate to indicate delay start mode
  Red LED Blinks: 10 second rate to indicate low battery and/or full memory, 1 second rate to indicate
  an alarm condition
Password Protection: An optional password may be programmed into the device to restrict access to configuration options; data may be read out without the password
Engineering Units: Native measurement units can be scaled
to display measurement units of another type
Battery Type: 3.6V lithium battery included; user replaceable
Battery Life: 10 months typical at a 1 minute reading rate
Time Accuracy: ±1 minute/month [at 20ºC (68ºF), stand alone data logging] Computer Interface: USB (interface cable required); 115,200 baud
Software: XP SP3/Vista/7 and 8 (32 and 64-bit)
Operating Environment: -10 to 60ºC (14 to 140ºF), 0 to 100% RH non-condensing
IP Rating: IP65
Dimensions:
  Data Logger: 36 H x 64 W x 16 mm D (1.4 x 2.5 x 0.6′)
  Probe: 111 L x 58 W x 0.76 mm thick (4.4 x 2.3 x 0.03′)
  Cable Length: 5 m (16′)
  Water Box: 74 H x 148 W x 39 mm D (2.9 x 5.8 x 1.5′)
Weight (OM-CP-LF101A-KIT): 226 g (8 oz)
Materials:
  Data Logger: ABS plastic
  Waterbox: Black Anodized Aluminum