Item # APG-815-DS, APG All Precipitation Weather Identifier and Gauges On Optical Scientific, Inc.

OSi's APG-815-DS (All Precipitation Gauge) uses proven optical scintillation technology and offers many performance and maintenance advantages over traditional tipping bucket and weighing type rain gauges.

In addition to rain and snow water equivalent rate and accumulation the APG-815-DS report present weather codes in NWS and WMO formats. Traditional rain and precipitation gauges cannot report present weather codes.

Adaptive Heater Technology (AHT) is used to conserved power. The lens heaters are only energized when needed. This mean the APG-815-DS is appropriate for solar powered installations. Solar power combined with OSi cellular phone makes the APG-815-DS ideal for remote installations and networks.

Advantages include:

Measurement of instantaneous precipitation rate; rainfall as light as 0.1 mm/hr. easily measured; no evaporation errors; can handle extremely high rain rates > 500mm/hr.; no overflow or mechanical limits to worry about
No moving parts; operates 24/7 under harsh field conditions. No antifreeze chemicals
Dust / dirt on lenses does not affect measurement; ultra-low maintenance
Wind does not create sampling problems. Slant path rain errors are negligible.
RS- 232 digital output allows instant/detailed analysis of event
Functions in all weather; our sensors are operating on every continent year-round (including Antarctica)
Intelligent sensor; automatic correction and continuous internal monitoring; operates unattended
Pays for itself in maintenance and replacement costs alone; no on-site monitoring needed; lasts for years
Flexible mounting, even on moving platforms (buoys / shipboard); nominal 12VDC power

OSi's sensors have more than 600 million hours of proven field operation in all climates. MTBF (Mean Time Between Failure) for OSi instruments is greater than 80,000 hours. The APG® operates unattended 24 hours a day, 7 days a week. The instrument uses proprietary algorithms that eliminate the need for frequent calibration. Field calibration every two years is typical. The APG® has AGC (Automatic Gain Control) to compensate for signal loss. The sensor also employs a comprehensive self-test that updates once per minute and reports any potential problems in the output message. less

Unit of Measure

Advantages

Additional Capability: Reports Present Weather Codes.
Superior Technology: APG® uses Optical Scintillation which is superior to other methods; measures true rain rate
Long-term reliability: operates unattended 24 hours/day, 7 days/week
Low maintenance
Adaptive Heater Technology (AHT): ideal for solar operation.
Data access: Low cost cellular modem option
Self-diagnostics & Testing: Continuously monitors performance and informs user of trouble

Accessories

Cellular modem option, consult factory
Solar Power Optional, consult factory
PSB-815 AC Power Supply & Junction Box®
QCS-815 QwikCollect Software: Collects, displays, archives data (compatible with all Windows systems)
LDM Limited Distance Modem: for distances > 100 ft. (max = 7 miles).

Performance Specifications

Rain Dynamic Range¹	N/A 0.001 to 500 mm/hr
Rain Accumulation	N/A 0.001 to 999.999 mm
Rain Accuracy (Accumulation)	N/A 5 %
Rain Resolution	N/A 0.001 mm
Output Format	N/A RS-232 Serial I/O, simple polled protocol
Snow Dynamic Range	N/A 0.03 to 500 mm/hr
Snow Accumulation	N/A 0.001 to 999.999 mm
Snow Accuracy (Accumulation)	N/A 5 %
Snow Resolution	N/A 0.001 mm
NWS Present Weather Codes	N/A Precipitation, Rain, Snow
WMO Table 4680 Present Weather Codes	N/A Precipitation, Drizzle/Freezing Drizzle, Rain/Freezing Rain, Snow
Data Update Rate	N/A Once per Minute

Electronic Specifications

Measurement Technique	N/A Optical Scintillation
Direct Current (DC) Supply Voltage	N/A 12 V
Current²	N/A 300 to 400 mA
Signal Output	N/A RS-232 ASCII
Transient Protection	N/A All power & signal cables protected

Environmental Specifications

Temperature	N/A -40 to 50 ºC-40 to 122 ºF
Humidity	N/A 0 to 100 %
Precipitation/Dust	N/A NEMA 4 type protection

Physical Specifications

Head Size	N/A 730 x 102 x 254 mm29 x 4 x 10 in
Head Weight	N/A 6.6 lb3 kg
Cable Length	N/A 48 ft15 m

¹ Consult factory for higher ranges.
² Depends on Ambient Temperature.

Advantages

Advantages

Accessories

Accessories

Performance Specifications

Rain Accumulation

Rain Accuracy (Accumulation)

Rain Resolution

Output Format

Snow Dynamic Range

Snow Accumulation

Snow Accuracy (Accumulation)

Snow Resolution

NWS Present Weather Codes

WMO Table 4680 Present Weather Codes

Data Update Rate

Electronic Specifications

Measurement Technique

Direct Current (DC) Supply Voltage

Signal Output

Transient Protection

Environmental Specifications

Temperature

Humidity

Precipitation/Dust

Physical Specifications

Head Size

Head Weight

Cable Length