Since Critical Environment Technologies Canada Inc. (CETCI) launched the Parkade Emissions Transmitter (PET) in September 2010, interests have spiked. PET is a highly competitive and versatile BACnet^® transmitter that is cost effective and is available in five configuration models.

PET BACnet^® transmitter is BTL certified, communicates via BACnet^® protocol MS/TP and is available with one or two electrochemical or solid-state sensors and temperature sensor. PET features thermal resetting fuse, tri-color LED indicators for power and alarm, optional 4-digit LED display, optional remote solid state sensor housing, and an optional 4-20 mA analog input for solid state sensors. In addition, PET includes a new sensor Calibration Extending Firmware (CEF) that takes into account the aging of the sensors so that less frequent calibrations are acceptable in non-critical applications.

Given that PET is available as a dual sensor transmitter; contractors will only need to purchase one unit, instead of two single sensor transmitter units. This could end up being a 30% cost saving. As a standard feature, both single and dual PET comes with a complimentary temperature sensor. There is no need to purchase and install a separate temperature device. All gas and temperature sensor values will be displayed at the same time, on a single unit. Not only is it cost effective to the contractor but is less time and money spent on installation.

PET is available in five configuration models:

• Single integral electrochemical sensor
• Dual integral electrochemical sensor
• Single integral solid-state sensor
• Single remote solid-state sensor
• Single integral solid-state sensor with 4-20 mA input activated for remote analog transmitter

Electrochemical sensor choices include ammonia (NH₃), carbon monoxide (CO), ethylene (C₂H₄), formaldehyde (HCHO), hydrogen (H₂), nitric oxide (NO), nitrogen dioxide (NO₂), oxygen (O₂), and sulphur dioxide (SO₂). This can be either a single or dual integral transmitter.

Solid state sensor choices include combustibles, TVOCs and refrigerants R11, R12, R22, and R134A. This can be either a single integral, single remote or single integral with analog input capabilities. For the later configuration model, any 24 VDC analog transmitters that output 4-20 mA can be connected to the PET and is powered by the PET. The PET in turn, converts the data to the BACnet^® protocol along with the integral solid-state sensor and temperature value.

PET is ideal for use in non-hazardous vehicle exhaust environments, commercial HVAC and light industrial applications.

For more information on the entire range of gas detection systems and IAQ instruments, please visit www.critical-environment.com.

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The AST series are rugged, reliable analog transmitters available with electrochemical, catalytic or solid state sensors to detect a wide range of gases. AST transmitters convert the raw signal from a sensor into a useful output that can be sent to a controller or building automation system. The standard housing is rugged PVC and an optional watertight polycarbonate housing is available to suit different applications.

CETCI’s family of gas detection controllers are designed to accept inputs from a number of remote transmitters (analog and/or digital) and perform control functions such as automatically activating exhaust fans, make-up air fans, alarm devices, etc. PAC and PDC controllers utilize microprocessor circuits allowing these controllers to be completely field configurable by the end user. A 2-line, backlit LCD provides the user with scrolling information about the connected transmitters and the built-in audible / visual alarms provide alarm notification to the user. The PAC accommodates 4 analog inputs and provides 4 analog outputs (4-20 mA). The PDC accommodates 8 analog inputs and 120 digital transmitters or 128 digital transmitters on a communication network. Both controllers provide a wide range of functionality.

CETCI makes rugged, reliable analog transmitters in several configurations to suit many different applications. They are available with a variety of sensor types to detect a wide range of gases, including electrochemical, catalytic, infrared and solid state. Several enclosure options are available to meet the environmental requirements. CETCI analog transmitters feature 4 to 20 mA linear output signals, automatic thermal resetting fuse and LED indication for power and alarm. Options include a field settable dry contact relay and a local digital display. Calibration and maintenance procedures are simple and are easily performed in the field.