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Juvenile loggerhead sea turtle (Caretta caretta) © Upwell and Nuno Vasco Rodrigues 2023
Tag
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K4H 130B Sensor
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K4H 132A
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K4G 132A Sensor
Lotek KiwiSat® K4 series offers a range of extremely light weight, field proven marine Argos transmitters for 100-450g sea turtles. Each model is carefully designed with a compact shape and minimal frontal area. Models are available weighing from as little as 2.9g and they are rigorously tested to depths as deep as 500m. The tag maximizes the benefits offered by the Argos-3 network meaning that transmit power can be halved for the same amount of data throughput and error rates thereby minimizing the transmitter size.
Ideal for small turtles, ranging in size between 100-3000g. Tested on green, Kemp’s ridley, leatherback and loggerhead sea turtles.
Crab protesters get some positive news + Tiny tech for Sea Turtles
https://www.cbc.ca/player/play/2186804291962
See baby sea turtles get released into the ocean live on TODAY
EMBER THE JUVENILE LOGGERHEAD SWIMS OUT INTO THE ATLANTIC!
https://www.upwell.org/news/2023/2/7/ember-the-juvenile-loggerhead-swims-out-into-the-atlantic
| Model | K4H 130B Sensor | K4H 132A | K4G 132A Sensor |
| Weight in air (g) | 2.9 [2] | 5.7 | 12.1 |
| Weight in saltwater (g) | 0 | 0.7 | -1.8 |
| Size (LxWxH) (mm) | 26 x 14.7 x 7.7 | 34.2 x 15.5 x 11 | 47.7 x 30 x 21.9 |
| Max Depth (m) | 200 | 200 | 500 |
| Estimated Life [1] (days) | |||
| Standard | Indefinite [3] | 40 | Indefinite [3] |
| DIVE | Indefinite [3] | n/a | Indefinite [3] |
| Recharge | via solar panel | via charging cable | via solar panel |
| Ideal turtle weight range (g) | 100-350 [4] | 150-450 [4] | 450-3000 [4] |
1. Estimated life using 200 transmissions per day.
2. The DIVE option model is 0.2g heavier.
3. Life indefinite due to solar charging capacity – results will va ry based upon the weather conditions and diving behaviour of th e animal.
4. Minimum limit based upon the combined weight of the tag plus attachment <5% of body weight; maximum limit is only an estimate as performance will vary based on the behaviours of the sub-population of animals.
Features and specifications subject to change without notice.
Technical Specifications:
Argos transmit power: <200mW
Operating temperature range: – 10˚C to 50˚C
Standard Sensors: Wet/dry sensor
Temperature sensor range: -50˚C to 75˚C
Temperature sensor accuracy: +/- 0.5˚C
Temperature sensor resolution: 0.25˚C
DIVE Sensors:
Calibrated sensor range: 0˚C to 40˚C
Depth sensor range: 200m (K4H), 300m (K4G)
Depth sensor accuracy: ±1% of Full Scale
Depth sensor resolution: ~0.1% of Full Scale
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