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Fixed Systems

GfG Instrumentation Inc

GfG's fixed gas detection systems are available as easy to operate single point units or as larger systems with several hundred transmitters. These multiple point systems consist of controllers and transmitters that communicate with each other. The transmitter changes the measured gas concentration to an electrical signal which is transfered to the controller. The controller shows the gas concentration in a display and immediately activates alarming devices in case of a gas leak. Advanced features such as data logging or online data transmission allow the user to easily monitor ambient changes in the environment. The Stand Alone unit is a combination of both transmitter and controller.

Controller

GfG controllers are designed to operate any transmitter offering either a 0,2-1 mA or a 4-20 mA signal. The controller processes the electrical signal received from the transmitter. It evaluates and displays the measured gas concentration. All controllers offer three on board relays that will be activated if the gas concentration exceeds the alarm level. All controllers are available as 1 or 4 channel controller. This means that either one or up to 4 transmitters detecting the same gas in the same range can be connected to one controller.

Transmitter

The transmitter's sensor is the "sense of smell" of a fixed gas detection system. The sensor is located in a metal sensor enclosure which is attached to the transmitter and converts the gas concentration into an electric signal. Electronics inside the transmitter changes this electrical signal for interference free transfer to the controller. The transmitter and the controller can be installed several 100 meters apart from each other.

Stand Alone

Stand Alone units are designed for applications where only one fixed point of detection is needed. The Stand Alone unit is a combination of both transmitter and controller. The attached sensor detects the gas and converts the concentration into an electric signal which is processed inside the unit by means of electronics. The Stand Alone unit is equiped with relays to activate external alarm devices.

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Universal controller for all transmitters
GMA41 / GMA44

GMA 41

Control and Evaluation Unit for all Remote Sensors

GMA 41 1-Channel, for one remote sensor
GMA 44 4-Channel, for 1 to 4 remote sensors

Easy snap-on mounting
For remote sensors with 0.2 .. 1 mA or 4 .. 20 mA signal3 threshold alarms, 4 relays with change-over contacts

Fixed gas warning system for DIN-rail mounting
Safely monitors over 100 gas hazards

The one channel gas warning system GMA41 and the 4-channel device GMA44 form, together with the efficient and robust transmitters of GfG, safe and reliable gas warning systems. The flexibility of the GMA's to adapt to different measuring tasks ensures individual and cost effective solutions. More than 100 gases can be safely measured and monitored.

Combustible / explosive gases

Where combustible gases may build up explosive concentrations, GfG offers a wide variety of sensors and transmitters.

Toxic gases

Specially selected GfG transmitters provide reliable monitoring of areas, where toxic gases and vapours may be present.

Oxygen

The GfG transmitters avoid hazards caused by oxygen deficiency or surplus.

Single or multi-channel controller

The GMA41 is a single channel system. A transmitter, in conjunction with a GMA41 forms an independent gas warning system.

The GMA44 is a cost effective and space saving controller for many detection points. Up to 4 transmitters, of the same kind, can be operated simultaneously from one GMA44.

  • Easy mounting on DIN-rail
  • State-of-the-art microprocessor technology
  • Flexible, for all measuring tasks
  • Can also be configured at a later stage

Call for price and availability!   1-800-766-4242

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Compact Evaluation and Control Modules for Wall Mounting
GMA 81/ GMA 84/ GMA 88

The GMA 81 (single channel monitor) for one remote sensor, the GMA 84 (4 channel monitor) for four sensors and the GMA 88 (up to 8 sensors) are the compact models of the GMA 101 and 104 for direct wall mounting.

The GMA 81 A and GMA 84 A provide an additional bright flashlight and a buzzer for alarm signals. Its compact design makes the GMA 81/84 the ideal system wherever only a few detection points are to be monitored.

In combination with GfG's remote sensors the new evaluation and control modules for the ideal fixed monitoring equipment for more than 100 different combustible and toxic gases and oxygen. Every controller can be flexibly adapter to its measurement task. In addition to the selection of gas and concentration the three alarm thresholds can be variably set throughout the detection range. For alarm or fault signals every controller provides 4 voltage-free relays, which can be individually set as NC or NO contacts respectively for open or closed circuit system. The 3 digit LED display allows the permanent check of the gas concentration. Detection range, gas and measurement unit are displayed on pressing a key. Menu driven zeropoint adjustment and calibration via keypad avoid unconfortable turning of potentiometers. An analog 4-20 mA output of the standardized sensor signal facilitates the connection of additional meters or recorders.

Just advise of your measurement problem, we offer the individual solution.
  • Single Channel (GMA 81) and 4-Channel (GMA 84) Models
  • Robust Enclosure for Wall Mounting Dim.: 130 x 185 x 95 mm (WxHxD)
  • With or without built-in Alarm
  • Protection Class IP 54
  • Easily Accessible Front Terminals

Call for price and availability!   1-800-766-4242

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Updated October 1, 2015