Walchem WebAlert Remote Monitoring and Datalogging Controller

The Walchem WebAlert is a web-based remote monitoring and datalogging unit that reads up to six 4-20 mA signals and six digital inputs from equipment you already have installed, and makes the data available through its embedded web server. It combines the functions of a monitor, a datalogger and an auto-dialer in one NEMA 4X (IP65) device and notifies on-site and remote personnel of abnormal conditions by e-mail, text message or a local alarm relay. As the Walchem distributor in Turkey, Mikron Proses (Üsküdar, Istanbul) supplies WebAlert units and provides application consulting for signal integration, panel mounting and commissioning.

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Technical data

Parameter	Walchem WebAlert
Analog inputs (6)	Up to six 4-20 mA inputs, range 3.75-20.25 mA, resolution 0.03 mA, calibration ±1 mA
Digital inputs (6)	Inputs 1-6: state or dry contact monitoring, response under 10 s Inputs 1-4 (low speed counter): 0-10 Hz, 50 ms minimum pulse width Inputs 1-4 (high speed counter): 0-400 Hz, 1.25 ms minimum pulse width
Communication	Ethernet with embedded web server; USB Plug and Play local connection
Alarms and reports	E-mail and text message alarms; Excel spreadsheet datalogs and system summary reports sent by e-mail
Power and enclosure	100-240 VAC ±10%, 50/60 Hz, 1.0 A; polycarbonate NEMA 4X (IP65); 0-60 °C; about 2 kg
Approvals	UL, CSA and CE (EN 61010-1, EN 61326)

How it is used

1. It web-enables existing equipment. The 4-20 mA and pulse outputs of installed transmitters, level sensors and water meters are connected to the WebAlert, so the values can be read locally or from anywhere in the world through a standard web browser. No software licence or monthly fee is required.
2. Plug and Play setup. A laptop is connected by USB, and the channel names, units, totalizer factors and alarm limits are defined through the menus; no programmer is needed.
3. Alarms and datalogs. Alarm conditions are sent as e-mail or cell phone text messages, and historical data is e-mailed as a spreadsheet at user-defined intervals or retrieved through a USB flash disk. With level sensors and switches connected, the unit also supports remote chemical inventory management and chemical deliveries.

When you need control outputs

The WebAlert only monitors and reports. If relay or pulse outputs for blowdown valves or metering pumps are needed as well, the Ethernet-capable Walchem controllers are the choice: see the Intuition-6, the Intuition-9 and the W600. For the wider range see the Walchem brand page.