Wire-free triggering for Terraloc products
All active seismic methods require a trigger signal to begin recording on the instrument as soon as the source event occurs. The simplest method is to run a trigger cable from the trigger device at the source location, back to one of the inputs on the ABEM Terraloc. This comes with some disadvantages, not least the inconvenience of requiring a physical connection between the source location and the seismograph. This could be required over a sizeable distance, perhaps many hundreds of metres.
The Seismic Radio Trigger provides an option for wireless triggering and has been designed with the Terraloc family of products in mind (although it would be compatible with numerous other seismographs). The system comprises two radio units: one to transmit the trigger signal and one to receive. Both the Transmitter (TX) and Receiver (RX) units can accept and provide both analogue and digital input / output.
Read more about the ABEM Terraloc Pro 2
Specification & Accessories
| CASING | 2 mm anodized aluminium |
| POWER | Rechargeable Li-ion 2600 mAh Low battery warning USB-C charging |
| TRIGGER INPUT | Geophone (with sensitivity adjustment) Hammer switch Digital 5.0 V |
| TRIGGER OUTPUT | Contact / Make Digital 3.3 V |
| TEST FUNCTIONS | Two-way radio test Manual trigger |
| DIMENSIONS | 157 mm x 47 mm x 130 mm (per unit, not including connectors or antenna) |
| WEIGHT | 620 g (per unit) |
| RADIO SYSTEM | LoRa FSK spread spectrum technology |
| MAXIMUM RANGE | 20 km* |
| ACCESSORIES | 2x 135mm fold & rotate aerial 1x Mueller-banana plug adapter 2x BNC-banana plug lead 1x Double USB power adapter 2x USB-C charging lead |
*The actual range will depend upon the type of antenna being used, the terrain, and how ‘congested’ the radio network is in the survey location.
