Specifications of version I:

Tag body: Diameter 16 mm, length 100 mm, weight 52 gm.

Sensor stalk: Diameter 2mm, length nominally 200 mm. Sensing region near the tip of the stalk is the same diameter and flexibility as the rest.

Surface materials: 316 stainless steel, silicone rubber, Teflon (TM)

Battery life: >7 years

Position logging life: >7 years

Data memory: 256K Bytes battery-backed RAM, 30 K is allocated to a 7 year "day log"

Light Measurement: Intensity of 470 +- 40 NM light over a 5.5 decade range.

Temperature: -5 to +35 C, 0.2 C resolution and accuracy.

Pressure (as depth): 0 to 510 m. Resolution 1M to 126M, 3M beyond.

Two pressure histograms are kept, 1M resolution to 255M, and 3 M resolution to about 700 M, with the limit somewhat higher for some individual tags.

Each tag comes with a detailed calibration and final test report.

Back to archival tag summary


Northwest Marine Technology, Inc
P.O. Box 427, Ben Nevis Loop Road, Shaw Island, Washington 98286
Telephone (360) 468-3375 Fax (360) 468-3844