Ambient Pressure Reference (APR) Specifications and Dimensions

APR-3 Specifications

Barometric Pressure Range	263 - 975 mmHg
Initial Accuracy	+/- 0.25 mmHg
Stability Over Time	0.25 mmHg/year
Physical Dimensions	9.8 cm x 4.0 cm x 3.8cm
Weight	182g
Data Output Connector	USB-C
Power Connector	USB-C
Standard Cable Length	3 meters
Maximum Cable Length	3 meters (can be extended with a USB - Ethernet extender)
Operating and Storage Temperature Range	-40ºC to 85º C
Operating and Storage Humidity	<85% R.H. non-condensing

APR-2 Specifications

Barometric Pressure Range	0-1000 mmHg (torr)
Initial Accuracy	+/- 1 mmHg
Stability Over Time	Better than 1.0 mmHg/year at 20ºC to 30ºC
Physical Dimensions	12.5 x 10.5 x 4 cm
Weight	570 g
Data Output Connector	RJ45 (8 pin non-keyed)
Power Connector	9VDC
Power Input	9VDC or 12W PoE (IEEE 802.3af compliant)
Current	60mA
Standard Cable Length	1 meter
Maximum Cable Length	10 meters
Operating Temperature Range	0º to 45º C
Operating Humidity	<70% R.H. non-condensing
Storage Temperature	-20º to 65º C
Storage Humidity	<85% R.H. non-condensing

APR-1 Specifications (Discontinued)

Barometric pressure range 650-800 mmHg (torr)

Initial accuracy +/- 1 mmHg

Stability over time Better than 1.0 mmHg / year at 20ºC to 30ºC.

Physical dimensions 14 x 10.5 x 4 cm

Weight 510 g

Data output connector RJ45 (8 pin non-keyed)

Voltage requirement 6.25 to 12.0 VDC

Current 60 mA

Standard cable length 1 meter

Maximum cable length 10 meters

Operating temperature range 0º to 50º C

Operating humidity <70% R.H. non-condensing

Storage temperature -20º to 65º C

Storage humidity <85% R.H. non-condensing

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