Wireless Technology 59 New Wireless Humidity/Temperature Sensors
Dwyer Instruments (USA) is announcing the release of its new series WHP wireless humidity/temperature sensors.
The Series WHP Wireless Humidity/Temperature Sensors provide flexibility in locating sensors and reducing wiring cost. Using a 418 MHz transmitter, the sensor can transmit data up to 100 feet without the use of a repeater. When coupled with a receiver and output module, the Series WHP can output voltage, current or resistance values for humidity and temperature. Since the unit is battery powered using two AA batteries, users can change the location of the sensor by a couple of feet or to a different wall without worry about extra labor cost. With the transmit rate at approximately one reading every 10 seconds, the battery is estimated to last 5 to 8 years.
The duct mount and outside air sensors come standard with sintered filters to protect the sensor particulates. Set point adjustment and/or manual override buttons are available on wall mount sensors.
Wireless Data Logging System – Fast, Remote Access to Data, Whenever You Need It!
Reader Reply Card no 188
Wireless Network Provides Monitoring and Control of Sensors, Pumps and Other Devices at up to 56 Remote Locations
A scalable wireless network that can monitor and control I/O functions or provide serial communication at up to 56 locations has been introduced by Banner Engineering (Belgium). The new SureCross DX80 product line replaces costly wiring in a wide range of industrial, agricultural, power generation, water supply and waste disposal applications. Discrete, serial and analog devices that can be controlled by the network include ultrasonic and photoelectric sensors, pumps, counters, thermocouple and RTD temperature sensors.
The remote nodes gather data and/or transmit control commands between the sensors or other devices and a central Gateway. The Gateway maps inputs from the remote nodes and interfaces with a PLC or HMI via RS-485 modbus or Ethernet/IP.
Designed for applications where wiring is impractical or
unaffordable, DX80 nodes and the devices they monitor can be powered by 10 – 30V dc, battery or solar panels. This capability can eliminate the need for power wiring as well as control wiring, providing significant cost reduction and ease of installation in
situations that cover wide areas. Banner’s unique power management capability and low power consumption enable a node and sensor to operate for years on a single battery power supply.
All units have industry standard robust IP67 housings. Models with Intrinsically Safe and Class I Division 2 approvals are available for extreme environments. Node to gateway transmission range using license-free radio is 3 km at 2.4 GHz or 10 km at 900 MHz (line of sight). The signal range can be extended or rerouted around natural obstacles by adding DataRadio modules as repeaters.
The DX80 SureCross wireless network is appropriate for a wide range of applications including: Monitoring tank levels and controlling remote pumps to assure efficient and reliable supply in gravity-fed water systems; Monitoring of level, flow, temperature and gas emissions on landfills; activate pumps for leachate extraction; Monitoring tank fill levels and valve position in water treatment and chemical processing plants to assure that materials are maintained at desired quantity; Maintaining proper soil moisture and temperature and air humidity for plant growth; Continuous remote monitoring and logging of compost temperatures so rows can be turned at the ideal point. This insures that harmful bacteria are killed while minimising risk of contamination through human measurement operations.
Reader Reply Card no 189 New Industrial Wireless Transmitter
The NEW zED Series wireless transmitters from Omega (USA) let you monitor sensors for temperature, humidity, and barometric pressure, as well as thermocouples and any transducer with an analogue voltage or current output.
You can record data and view active charts in Web pages over an
Ethernet network or the Internet without any special software, just your Web Browser. You can even set alarms for notifications by email including text messages to mobile phones.
The radio is a High Power IEEE 802.15.4 compliant transmitter operating at 2.4 GHz. It can transmit over one Kilometre (without obstructions). The zED Series wireless transmitters are designed for demanding industrial applications and harsh outdoor environments. The electronics are protected in a rugged weatherproof, polycarbonate IP65 rated housing.
Omega offers different models powered by conventional alkaline batteries that can last for years, as well as versions powered
by a universal AC adapter that operates on any voltage worldwide (110 to 240 Vac). Reader Reply Card no 190
Wireless Data Logging simply means that multiple radio data loggers can be placed around an industrial site or premises; and data, such as temperature and/or humidity, can be accessed quickly and remotely at any time from a central source.
Wireless Data Logging is advantageous in that the need for system management is minimal and the manual set up and download of data from individual data loggers is eliminated, making it extremely convenient and cost effective if a site has a need for 20 or more monitoring points.
The Tinytag system from Gemini Data Loggers (UK) consists of a network or ‘mesh’ of radio loggers, which transmit data to a central receiver connected to a PC. Each radio logger is a self-contained, battery-powered unit that can receive, store and transmit data to other radio loggers as well as the central receiver. The loggers are self-configuring and the network robust and self- healing. Such intelligent technology means that loggers can be up to 200 metres away from each other and if the data route back to the receiver is blocked by a temporary obstruction, for example, a truck, data will bypass the obstruction by being transferred to a neighbouring logger and from there back to the receiver. In this way, data is safely transferred and cannot be lost.
Similarly, if a radio logger has been unable to transmit because it has moved out of range of its neighbouring loggers or the host PC has been switched off, the radio logger will store data locally temporary and automatically transfer it when the interruption is cleared.
A remote alarm signalling function is particularly useful to perishable or fragile goods and means that in the event of a problem (temperature is out of range) when no one is on site, an email or SMS alert will be transmitted to the nominated person, so that corrective action can be taken as soon as possible.
Used in conjunction with Windows based Tinytag Explorer Radio software, it becomes simple and intuitive for users to manage their data loggers and recorded data. Data can be collected from each individual probe, logger, group of loggers or site, in order to analyse and output data that is useful and meaningful to the company. Tinytag Explorer Radio software can be set up remotely, allowing data to be checked via an internal network or the Internet, and allowing for the monitoring of multiple sites from one location.
The Tinytag Wireless Data Logging System provides fast, reliable and convenient access to your data, minimal management time and the flexibility to analyse and produce data outputs that are relevant for your business. For a moderate to large data logging requirement, the Tinytag Radio Logging System will save you time and money.
Reader Reply Card no 191
Annual Buyers Guide 2010
IET
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