Products

		Frost Alarms: Solar powered wireless weather stations with frost monitoring capabilities.
		Weather Stations: Industrial grade weather stations with the ability to monitor multiple sensors and report data via cellular or satelite signal back to the internet.
		Irrigation Monitors: Designed to meet council specifications while still providing easily accesible information for the customer. Available in indoor mains powered or outdoor solar powered models.
		Industrial Monitoinrg: Harvest have a range of industrial monitoring options utilising GPRS/3G cellular or Iridium satellite communications to monitor a variety of applications. All of our industrial monitoring solutions are based around the ITU or SPE. Weather Stations | Rain Gauge Monitors | Rail Crossing Monitors | Sewer Overflow Monitors
		DTMF Remote Controllers: The Harvest DTMF Remote Controller connects to an external radio or uses optional plug in GSM module to read eight inputs and control eight outputs at a remote site with full voice response.
		Serial Port Extender: Used to set up a virtual connection between a remote device (with a serial port) and a central computer. Remote equipment can then be controlled from anywhere in the world, and treated as if it were connected directly to the central computer. Harvest Electronics can customise this product (hardware and software) to suit your application.
		Industrial Telemetry Unit: An extended version of the SPE with extensive I/O and logging capabilities. The new G2 has new features such as: SDI-12 interface, onboard LCD display with control panel, logs instantly retrievable via SD card, 8 digital inputs, 8 switchable analog inptuts and more.
		Modems and Modules: Motorola GSM/3G/CDMA modules. These modules can do GPRS/3G data, circuit-switched data (CSD), text messaging (SMS), and more. They are suitable for various applications with PPP and IP support.
		Motorola M930 Handset: Motorola M930 is an ergonomically designed fixed mobile car phone, uniquely designed for the vehicle environment.

More About GPRS

The General Packet Radio Service (GPRS) is a packet data extension to the GSM cellular network. Unlike circuit-switched data, GPRS does not assign a fixed bandwidth per call and charge per minute, but instead uses packet switching and charges for the data volume.

GPRS comes into its own when you need to make many calls or stay online, or when you have small amounts of data to send. With a circuit-switched call you might pay for 60KB of data when you only send 500 bytes, whereas with GPRS you'll pay only for what you send. (60KB is based on a 1-minute minimum charge at 9600bps. Note that some charging plans include a minimum data volume charge that must be considered.)

In order to use GPRS, your equipment must support Internet Protocol (IP), Point to Point Protocol (PPP) and the associated protocols. This is not a problem if you are using a PC, but most industrial and telemetry equipment can only deal with RS-232. Our SPE adds a microcontroller to allow RS-232 equipment to talk to a GPRS modem. The SPE deals with all the necessary protocols and packetisation, so your equipment only has to deal with the data.