The Haglof Sweden T4 Transponder is a high-quality ultrasonic reference unit designed to work seamlessly with Vertex instruments, Vertex Laser Geo, and older compatible models. It enhances height, distance, and angle measurements by serving as a reliable reference point, even when the line of sight is obstructed or in dense vegetation. The T4 replaces older transponders with updated electronics, improved battery flexibility, and enhanced user feedback, making it a practical upgrade for professionals who demand precision and durability.
Key Features
Replacement: replaces older transponders (T3 and earlier) with improved electronics and housing
Operation Modes: direct measurement (~60°) and 360° mode when used with the adapter
LED Indicators: six LEDs showing status, responsiveness, and noise detection
Power Supply: compatible with any 1.5 V AA battery, ideal for field use
Compatibility: Vertex 5, Vertex Laser Geo, DME, and older Vertex/T-series models
Technical Specifications
Diameter: ~70 mm
Weight (incl. battery): ~85 g
Battery: 1 × AA 1.5 V alkaline
Power Consumption: ~9 mW
Operating Duration: approx. 20 minutes active time per activation
LED Indicators: 6 LEDs (status, signal, noise, etc.)
Modes: direct (~60°) and 360° with adapter
Compatibility: fully compatible with Vertex, GEO, DME and older Vertex/T-series instruments
