Free Dive Mode
Tracks descent speed, maximum depth, surface interval duration, and water temperature. Optimized for spearfishing and freediving performance analysis.
Underwater Technology & Engineering
Diving With KOSPET
10 ATM & IP69K Certification
Durability & Marine-Grade Water Resistance
Built from corrosion-resistant 316L stainless steel alloys featuring protective passivation technology, KOSPET diving smartwatches withstand prolonged saltwater exposure, sweat, and extreme underwater pressure. Validated across 15 MIL-STD-810H environmental tests and over 28 rigorous internal stress protocols, KOSPET delivers uncompromised reliability for marine sports retailers and commercial distributors.
Versatile Marine Performance
Multiple Dedicated Dive Modes
Engineered for professional training and underwater recreation, KOSPET TANK M4 and T4 series support real-time depth measurement, water temperature tracking, and automatic dive log recording across three core operational modes.
Scuba Dive Mode
Supports single-gas recreational diving up to 40 meters. Computes Non-Decompression Limits (NDL), safety stop counters, and decompression stop alerts.
Gauge Mode
Operates as a high-precision bottom timer, providing accurate depth and elapsed dive time measurements for technical reference.
Decompression Science
Bühlmann ZHL-16C Decompression Algorithm
When operating in Scuba Diving Mode, KOSPET smartwatches utilize the scientifically proven Bühlmann ZHL-16C decompression algorithm. The on-board processor continuously calculates inert gas absorption and nitrogen tissue loading across 16 theoretical tissue compartments.
By accurately modeling gas exchange at varying depths, the watch helps divers control ascent rates, stay within safe NDL boundaries, and minimize decompression risk during recreational dives up to 40 meters depth.
Underwater Awareness
Comprehensive Dive Safety Systems
Real-time visual and haptic monitoring systems keep divers informed of critical environmental metrics.
Dive Depth & Time Alerts
Automated haptic notifications trigger when preset depth or dive time thresholds are reached, ensuring divers maintain situational awareness.
Oxygen Toxicity Management
Monitors Central Nervous System (CNS) toxicity percentage and Oxygen Tolerance Units (OTU) to prevent hyperoxic complications at depth.
Decompression & NDL Tracking
Calculates real-time NDL limits and provides clear step-by-step decompression stop depths should NDL thresholds be exceeded.
Professional Diving Guidelines & Operational Notice
- Depth & Certification Boundaries: KOSPET TANK M4 and T4 smartwatches carry a 10ATM rating (100m static water resistance) and are certified for recreational scuba diving, training, and freediving up to 40 meters depth. They are intended for use by certified divers or under expert supervision.
- Decompression Risk: While integrated decompression management algorithms assist in planning safe ascent profiles, physiological factors vary per diver. Always adhere strictly to safe diving principles and monitor your primary gear.
- Redundant Instrumentation: Standard marine safety practice requires carrying backup depth gauges, pressure gauges, and dive timers alongside electronic wrist devices.
- Pre-Dive Verification: Confirm all battery levels, gas mixture settings, and unit preferences in the APEXMOVE app before entry.