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Grillo Pulse

Grillo Pulse is a seismic sensor with two sensors in one enclosure: a geophone for small, distant earthquakes and an accelerometer for strong shaking. It sends its data in real time over cellular or Ethernet.

:::warning Power it only from 12 V DC Grillo Pulse runs from 9–16 V DC (12 V nominal) through its M12 power connector. It cannot be powered from USB, and a USB cable with power on it can damage it. Leave the USB ports alone unless Grillo Support asks you to use them. :::

At a glance​

Geophone4.5 Hz vertical, 32-bit converter. Channel EHZ.
AccelerometerThree-axis MEMS. Channels HNZ, HNN, HNE at 125 samples per second.
ConnectivityPulse Cellular: LTE Cat-1. Pulse Ethernet: 10/100 wired Ethernet through an M12 connector.
Power9–16 V DC (12 V nominal), through the M12 4-pin power connector. No built-in solar or battery.
ConnectorsM12 power and SMA GPS antenna on both variants. Plus SMA cellular antenna on Pulse Cellular, or M12 Ethernet on Pulse Ethernet. See What's in the Box.
TimingGPS, or network time (NTP)
Status lightsInside the enclosure only. Use Grillo Cloud to check the sensor.
Managed inGrillo Cloud

Two variants​

The two variants are the same sensor with a different connection. Check your order or the enclosure label to see which one you have.

  • Pulse Cellular connects over the mobile network. Use it where there is mobile coverage and no wired network. See Cellular and SIM.
  • Pulse Ethernet connects to a wired network. Use it where you have a network port and want a fixed connection. See Connectivity.

Installation sequence​

  1. Check what's in the box and record the Device ID.
  2. Claim it in Grillo Cloud.
  3. Bench-test it: power, connection, and online in Grillo Cloud.
  4. Install it on site.
  5. Verify it is online before you leave.

Setup is complete when​

In Grillo Cloud:

  • The Device ID and station code are correct.
  • The sensor is online and Last Seen is current.
  • The connection type matches the variant: Cellular or Ethernet.
  • The coordinates and location name are correct.

Off-grid power​

Pulse has one power input: 12 V DC, on its M12 power connector. It has no built-in solar or battery. For a site without mains power, plug in a solar kit, which is a solar panel and battery that supply 12 V DC. Grillo offers two:

  • For continuous recording, where the sensor records and sends data all the time.
  • For triggered recording, where the sensor records on trigger, for example structural health monitoring.

Ask Grillo which kit suits your site, or use your own solar charge controller and battery that supply a steady 12 V DC.

:::note Earlier Pulse units This guide covers the current Grillo Pulse. Units installed before 2026 use different hardware and firmware. If you look after one of those, contact Grillo Support for its procedures. :::