There’s a new temperature and humidity sensor from Lascar designed to make life much easier for anyone setting up office or other commercial networks. Ethernet cable compatible, the device takes readings from a server room or any other environment which needs to closely monitor temperature and humidity.
Lascar’s Easylog WiFi TH sensor transmits data via any wireless network to a PC. The data can then be analysed using free software. It’s available with either an internal or external temperature probe. The datalogger’s low-powered battery should give around a year’s service, and can be charged using a USB cable, supplied with the device along with a wall bracket.
It works by connecting to a local PC using Ethernet cables and storing the WiFi connection associated with that machine. The device can then be placed in a server suite, storage room, office, water tank – or anywhere else which requires constant temperature monitoring.
Even if the device loses connectivity, it simply logs the latest readings until it is able to reconnect with the PC. The sensor’s range can be increased using WiFi extenders. Data can be set to read from anything between every ten seconds to every twelve hours. Even without the software, the unit alone logs up to 500,000 data points which can be read on the LCD.
The software designed to read the data is supplied on a CD-ROM. It’s also available from Corintech, and is completely free to download and install. Once set up, the software allows you to name the sensor, receive frequent readings (either in centigrade or fahrenheit) and sound an alarm if the temperature or humidity goes above or below your presets. It then logs the data, which can be exported into a spreadsheet for historical reviews.
The external version of the datalogger comes with a IP rating of 67 and uses a removable, 500mm thermistor probe (there is also a metre-long version available for twenty quid from RS Components). Probe aside, the specs for both internal and external sensors are identical:
-Ingress Protection Rating of 55, making it resistant to dust and water
-Data entry capability of 1 million+
-Data storage in event of WiFI disconnection
-Internal, rechargeable lithium polymer battery
-USB port for recharging
-Configurable high/low alarms
-WiFi connection indicator
The wall bracket and battery charger supplied means there’s no extra fuss around setting up the unit. Even if you mount the unit to the wall of your server suite before configuring it to the PC, you can simply run an Ethernet extension cable from the computer to the device. The battery needs only an annual charge (although bear in mind that the sensor’s readings may be skewed during battery charging).
Whether for raising the alarm in an emergency, or simply for the more fastidious office or operations manager to keep an eye on their hardware, the EL WiFi sensor is hard to beat. The external sensor is priced at £97, and the internal one at £99. Both are available from RS Components, where you’ll also find Ethernet cable extension, Ethernet cables, and a wide range of network installation products.
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