Techmark

TECHMARK'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
TECHMARK 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.

	GMA41	GMA44	GMA81	GMA84	GMA101	GMA104	GMA301	GMA304
Mounting	DIN-rail		Wall		EURO-cards for 19" rack
No. of transmitters	1	4	1	4	1	4	1	4
Digital Display	x	x	x	x	x	x	x	x
Bargraph	-	-	-	-	-	-	x	x
Data Logger	-	-	-	-	-	-	x	x
On-Line Data Transfer	-	-	-	-	-	-	x	x
Output signal : 0-10 V 4-20 mA digital	- x -	- - -	- x -	- - -	- x -	- - -	x x x	- - x
Alarm	3 Alarm Thresholds, Adjustable						3 Alarm Thresholds and delta-alarm, Adjustable
Configuration	By means of keys in the service-menu, connection to PC for all settings						By means of keys in the service-menu, DIP-switch amd PC remote control
Relays	4 relays for alarm and fault, adjustable as: normally open contact (NO)/normally closed contact (NC), active / passive, storing/non storing, exceeding/falling short

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.

Overview: Transmitter for combustible gases and vapors
Overview: Transmitter for toxic gases
Overview: Transmitter for oxygen

Measured Gas	Measuring Range	Detection Principle	Product (Ex=Ex-Approval)
Combustible gases and vapors	% LEL	CC	CC0238 Ex CC24 Ex CC28 Ex new!
	% LEL, ppm	CS	CS21 CS24 Ex
	ppm H2	EC	EC24 EC25 Ex EC35 Ex pending
Oxygen	Vol. - % O2	ZD	ZD21
Oxygen	Vol. - % O2	EC	EC24 EC25 EC35 Ex pending
Toxic gases and vapors	ppm	CS	CS21 CS24 Ex
	ppm	EC	EC24 EC25 Ex EC35 Ex pending
	ppm, NH3	CI	C121
	Vol. - % CO2	IR	IR24

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.

GMA313 - Carbon Dioxide Gas Monitor

Measured Gas	Measuring Range	Detection Principle	Product (Ex=Ex-Approval)
Combustible gases and vapors	ppm H2	EC	EC36 Ex pending GMA36 pro
Combustible gases and vapors	% LEL	CC	CC28 Ex new !
Oxygen	Vol. - % O2	EC	EC36 Ex pending GMA36 pro	Dynagard
Toxic gases and vapors	ppm	EC	EC36 Ex pending GMA36 pro	Dynagard


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