Field Comms
Cardinal Comms Beacon S2: median message delivery of 47 seconds under open sky
600 test messages across four terrain types. Under canopy the median goes to 6 minutes 20 seconds.
By Dan Reyes4 min read2026-03-21
Key takeaways
- Reviewed 2026-03-21.
- 5 of 6 checklist results passed.
Pros & Cons
- Lone-worker cover outside cellular
- Expedition and remote survey teams
- Work is consistently under dense canopy
- You need user-replaceable cells
The report
Four units, purchased. 1,200 timed messages total, split between open sky, dense conifer canopy, a steep valley, and inside a steel-frame building.
Open sky is strong: 599 of 600 delivered, median 47 seconds, 95th percentile 2 minutes 11 seconds. Under canopy the median stretches to 6 minutes 20 seconds and 29 messages never arrived. Plan comms windows accordingly.
Ingress and impact are both class-leading. Thirty minutes at 1 m produced nothing in any of the four units, and twenty drops onto rock left cosmetic scarring only.
The mark against it is serviceability: 66. The battery is sealed. At end of life this is a disposal, not a repair, which is a real cost for a fleet of 200.
Test results
| Criterion | Method | Result | Verdict |
|---|---|---|---|
| 600 messages, open sky | Reviewed by us | 599 delivered, median 47 s | Pass |
| 600 messages, dense canopy | Reviewed by us | 571 delivered, median 6 min 20 s | Pass |
| Submersion, 1 m / 30 min | Reviewed by us | No ingress, 4 / 4 | Pass |
| Drop, 1.5 m onto rock | Reviewed by us | 20 / 20 without fault | Pass |
| Gloved SOS activation | Reviewed by us | Median 4.1 s with 5 mm glove | Pass |
| Battery replacement | Reviewed by us | Sealed, not user-serviceable | Fail |
Specifications
| Mass | 148 g |
|---|---|
| Ingress rating, claimed | IP68, 1 m / 30 min |
| Battery, rated | 14 days at 10-min tracking |
| Battery, measured | 12 days 4 h at 10-min tracking |
| Median delivery, open sky | 47 s |
| Median delivery, dense canopy | 6 min 20 s |
| SOS routing | 24/7 monitored centre |
Where to buy
Disclosure: some links below earn us a commission. Commission never affects our judgement, and we buy every unit we review at retail.
- Direct from Cardinal CommsAffiliateIn stock$389 plus $24/month
- Provantage IndustrialAffiliateIn stock$389 plus $24/month
Corrections: No corrections logged for this report. Correction log
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