Refrigeration Gas Detection
Feb 15 2018
Sensitron Srl, leader in the field of gas detection for 28 years, offers new solutions for refrigeration gas detection. The warhorse of Sensitron is the SMART3G - D2 gas detector that allows the monitoring of refrigerant gases contained in hazardous environments and in potentially explosive classified areas. They offer a 4-digit backlit display and are equipped with a non-intrusive calibration function for accurate and easy adjustment with Hall effect switches, without opening the instrument. The SMART3G - D2 detector can be connected to the MULTISCAN ++ control panel with a 4-20mA connection and / or the RS485 (Modbus) connection. Optionally, it is possible to have a larger aluminium case or stainless steel case in order to connect a 3 relay board. Standard functions are self-diagnosis, monitoring and stabilisation of zero.
They are also in compliance with ATEX II2G Ex db IIC T6 certification (standard marking) (II2 GD with optional adapter). Sensitron SMART3G - D2 detector can mount the following technologies depending on the gas to be detected: Electrochemical cells, Pellistors and NDIR (Non-Dispersive Infrared). The MULTISCAN ++ S1 control units are control panels for gas detection, designed to meet the widest demand for flexibility on the market. The control panels allow the simultaneous management of up to 256 gas detectors depending on the version used (8,16, 32, 64, 128 or 256 channels). These can be connected directly on the bus, or via analogical 4-20 mA with the remote modules 8 STG / IN8-S inputs.
The system structure includes 8 pre-set relays on the machine and the possibility to expand the outputs with additional 256 open collectors, through remote STG/OUT16-S modules. These modules can be connected to 8-relay boards if the relays are preferred to the O/C. Other features of MULTISCAN ++ S1 control panels are event memory and RS232 serial port. The control units are available in IP65 plastic box or 19 "6U HE rack. For non-classified areas Sensitron proposes two different gas detectors: SMART3-H for household premises and SMART3-R for the machinery rooms. Both the SMART 3-R and SMART 3-H employ high quality catalytic, MOS sensors, electrochemical cells or infrared sensors. Both are EN 378-3 and EN14624 compliant.
They provide a proportional 4-20mA output signal. By employing optional boards, they can either communicate on a serial bus RS 485 or provide relay outputs. SENTOX4+ represents a reliable cost effective solution for gas detection in small system. Ideal for residential and commercial applications, this panel can manage up to four remote analog 4-20mA gas detectors for explosive or toxic gases. The front panel comprises 4 LED bars to show the fault, pre-alarm, alarm and over-range status of each detector being connected. Warning LEDs are also available to indicate the mains supply, system and battery failure as well as a Reset/Test button. Four output relays are present to activate in case of Pre-Alarm, Alarm, Fault and to operate a solenoid valve. The panel is housed in a plastic enclosure suitable for din-rail mounting. Plug in terminals on the front side offer an easy connection.
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