The H-Guard-D is a CO2 transmitter series designed to be installed in HVAC return air ducts. The CO2 sensing element uses the Non-Dispersive Infrared Technology (NDIR) with the patented self-calibration system to guarantee the long term stability and up to 15 years life time. H-Guard-D duct probe transmitter offers temperature and humidity option. The high accuracy temperature and humidity combined sensor provide a digital interface and outstanding full range linearity. The one or three analog 0-10V or 4~20mA outputs are selectable by jumpers. Modbus RS485 communication interface is provided. Optional backlit LCD can display all measurements and is usable easily in more applications. H-Guard-D offers simplicity in design and installation with the special  demountable and replaceable filter to avoid pollution and influence of measurement.
 

The H-Guard is a CO2 transmitter series designed to be installed in HVAC applications. The CO2 sensing element uses the Non-Dispersive Infrared Technology (NDIR) with the patented self-calibration system to guarantee the long term stability and up to 15 years life time. 
 

GasTech Australia has released the latest series of GasTech’s digital gas detectors the C-Guard^TM. This new style of gas detector uses an advanced processor and program logic, making the C-GuardTM the most reliability and lowest cost total ownership on the market.
The main application for the C-Guard^TM range is commercial uses, Car Park, and HVAC applications. This market requires a detector that is extremely reliable and very quick to calibrate.
Our engineers have developed high end electronics and a program that monitors the sensor’s outputs and is tailored to and pre-programmed for many different gas types. The program and electronics process the sensor’s output trends and calculates accurate and stable readings. This is transmitted back to the processor using the industry standard 4-20mA. 
 

To comply with local standards and jurisdiction, "end-toend" loop testing of Fire Protection Alarm Systems, including detectors, should be performed periodically. Many Safety Authorities and Plant Managers of high value / high risk assets and facilities insist on quarterly "endto-end" testing of their entire Fire Protection Systems using an external Flame Simulator.
Spectrex Flame Simulators emit electromagnetic radiation in a unique sequential pattern corresponding to and recognizable as fire by the specific SharpEye Flame Detector model. This allows the detector to be tested under real fire conditions without the associated risks of an open flame.
Spectrex Flame Simulators are ATEX certified EExd for use in Zone 1 hazardous areas and are powered by rechargeable NiCad batteries. When fully charged, the Fire Simulator will operate for at least 50 tests without recharging.

testo 330 LL   

The new flue gas analyzer testo 330 LL visualizes measurement data graphically

Independently of the technology used, every combustion system must function optimally. More than ever, requirement-based heat provision, low energy consumption and reduced pollutant emission are of central significance. In order to be able to exploit existing optimization potential as well as possible, regular testing and adjustment of the heating system is necessary. The new Testo flue gas analyzers testo 330-1 LL and testo 330-2 LL offer even more professional support in this thanks to new instrument functions. 

The new colour graphic display of the flue gas analyzer testo 330 LL visualizes the measurement data graphically: Self-explanatory graphic curves as well as easy symbols and clear colour design ease the analysis of the measurement data considerably.