The Wireless Trigger Box 4 (WTB 4) system detects a mechanical impact source firing, and triggers the seismograph.

A WTB 4 system has two components:

One WTB 4, connected to the source, detects the trigger pulse from the source and then transmits it to the seismograph.

The second WTB 4, connected to the seismograph, receives the message from the source and starts the seismograph.

Each WTB4 unit consists of:

Internal Radio Trigger Module (RTM)

Internal 3 Watt VHF radio

Internal 99 watt-hour rechargeable battery

Internal GPS module

The WTB 4 adds flexibility:

The source WTB 4 can trigger multiple WTB 4 equipped seismograph.

The recorder WTB 4 can receive trigger messages from multiple WTB 4 equipped sources.

Multiple source and seismograph systems can be deployed in 2D or 3D configurations.

Wireless Trigger Box 4 Specs:

Trigger Signal: TTL or Switch Closure

Trigger Input: Detects Negative Edge

Trigger Output: TTL Positive Pulse

Radio Cycle Time: 500 mSeconds

Accuracy: ±1 μSeconds

Internal Wi-Fi: Standard

Radio: 3 Watt

Radio Range: 1 mile (3 mile with optional 1/2 wave antenna) (depends on terrain)

Weight: 4.5 lbs (2 kilograms)
With radio and battery

Size: 11.5 x 7.25 x 3.0 inches (292 x 184 x 76 mm)
Without antenna

Optional Features:

Removable External Memory: backs up time breaks at the source

External GPS Module: To mount the GPS unit outside the source

Internal Battery: 99.9 watt-hour LION (runs 24 hours depending on use)

External 1/2 Wave Radio Antenna.: Extends radio range to 3 miles (depends on terrain)

Navigation App: Allows Navigation and viewing of WTB4 status