Tecnos S.R.L Gas Detectors (Gas Detection)
RAS (ATEX ZONE 1)
RAS/AD
ATEX Gas Detector certified II 2 G Ex d IIC T6, aluminium alloy or stainless steel housing, protection rate IP65.
Available outputs: 4-20mA or relays, RS485.
DESCRIPTION
RAS/AD and RAS/DY are rugged, intelligent gas detectors for a wide
variety of Explosive and Toxic gases.
Main Characteristic
– Microprocessor based
– 4-20 mA output and/or
– Three Voltage free relay contacts output
– RS-485 MODBUS RTU serial interface or
protocol for remote control maintenance
– LCD Display 8×2 characters
– Non Intrusive “One Person” calibration procedure
– Fully programmable
– Small size and Low Power consumption
– Certificate ATEX II 2G Ex d IIC T6
Gas Detectors RAS Series are built in conformity to 94/9/CE ATEX
Directive, included functional performances, moreover they are in
conformity to SIL 2, being suitable to be part of safety systems.
RAS-AD
Aluminium or Stainless Steel
Explosion Proof housing
– Ideal to detect combustible or
toxic gases and solvents
– Sensors with strong poison
resistant properties
Bluetooth
Thanks to introduction of Modbus or Bluetooth protocols it is possible to establish a direct communication between the sensor and your PC, PDA or Mobile Phone.
This features allow you a complete control of all sensor’s functional parameters such as Zero, Span, Sensitivity, Alarm Thresholds TWA, STEL and Download maintenance
operations reports or events Log.
MAIN SUBSTANCES LIST (IR Infrared Technology)
SUBSTANCES DESCRIPTION PRODUCT CODE
Methane (CH4) Infrared sensor for fixed detecting systems of explosive substances 0-100%L.E.L. RAS/AD/201/…
Propane (C3H8) Infrared sensor for fixed detecting systems of explosive substances 0-100% L.E.L. RAS/AD/204/…
Carbon Dioxide (CO2) Infrared sensor for fixed detecting systems of CO2 range 0-20000ppm (0-2%v/v) up to 0-100%v/v RAS/AD/279/…
MAIN SUBSTANCES LIST (Catalytic Technology)
Methane (CH4) General purpose catalytic sensor for fixed detecting systems of explosive substances 0-100%L.E.L. RAS/AD/101/…
L.P.G. (Mix) General purpose catalytic sensor for fixed detecting systems of explosive substances 0-100%L.E.L. RAS/AD/102/…
Propane (C3H8) General purpose catalytic sensor for fixed detecting systems of explosive substances 0-100% L.E.L. RAS/AD/104/…
Hydrogen (H2) General purpose catalytic sensor for the detection of H2 0-100% L.E.L. RAS/AD/127/…
Ammonia (NH3) General purpose catalytic sensor NH3 0-100% L.E.L. RAS/AD/140/…
Ammonia (NH3) High Quality catalytic sensor NH3 0-2% v/v (0-20000ppm) RAS/AD/141S/…
MAIN SUBSTANCES LIST (Electrochemical Cells Technology)
SUBSTANCES DESCRIPTION PRODUCT CODE
Ammonia (NH3) Electrochemical Cell for NH3 0-100 / 0-500 / 0-1000 / 0-5000 PPM RAS/AD/340/…
Carbon monoxide (CO) Electrochemical Cell for CO 0-300 / 0-500 PPM RAS/AD/320/…
Hydrogen sulphide (H2S) Electrochemical Cell for H2S 0-20 / 0-100 PPM RAS/AD/369/…
Oxygen (O2) Electrochemical Cell for O2 0-25%v/v RAS/AD/361/…
Sulphur dioxide (SO2) Electrochemical Cell for SO2 0-20 PPM RAS/AD/370/…
MAIN SUBSTANCES LIST (PID Photo Inonization technology)
VOCs Photo Ionization sensor optimised for VOCs 0-400 PPM (Other ranges available) RAS/AD/571/…
OUTPUTS CONFIGURATIONS
Outputs Description Code
4-20 mA + RS485 Analog current loop + Serial RS485 Modbus Protocol AAS (RAS/AD & DY)
3 Relays + RS485 Voltage free contacts 1A 100 Vdc max. + Serial RS485 Modbus Protocol CCS (RAS/AD only)
3 Relays + 4-20mA + RS485 Voltage free contacts 1A 100 Vdc max. + Analog current loop + Serial RS485 Modbus Protocol CAS (RAS/DY only)
GENERAL SPECIFICATIONS
Sensors: Catalitytic pellistor or electrochemical cells or Infrared or chemical absorbtion cell
Code of protection: ATEX II 2G Ex d IIC T6
Location: Hazardous classified areas Zone 1
Degree of protection: IP65 or IP66 when fitted with optional PTFE filter
Short-term repeatability: ±2% FSD 60 min.
Long-term repeatability: ±5% FSD 3 months.
Accuracy(linearity): ±5% FSD
ENVIRONMENTAL SPECIFICATIONS
EMC: According to EN61000-4
Storage temperature: -40 to85 °C
Operating temperature: -20 to 70 °C
Humidity range: 90% R.H. n.c.
MECHANICAL SPECIFICATIONS
Overall dimensions: 170x100x70 mm
Material: Aluminium alloy with chrome plated brass or Stainless Steel
Weight: 0.8 Kg.
Mounting: 2×6 mm holes
Junction box attachment: 3/4″ NPT
ELECTRICAL SPECIFICATIONS
Supply Voltage: 12-30 Vdc
Power consumption: 1 watt (AAS Version)
Supply fuse: 500 mA
Signal fuse: 63 mA
Analog output: 4-20 mA
Load: 0-300 ohms at 24Vdc
Cable Type: 3 conductors cable (4-20mA Version)
Relay Contact Rating: Max. 1A – 100Vdc – 150 mΩ
RAS/DY
ATEX Gas Detector certified II 2 G Ex d IIC T6, aluminium alloy or stainless steel housing, protection rate IP65.
With display.
Available outputs: 4-20mA or relays, RS485.
DESCRIPTION
RAS/AD and RAS/DY are rugged, intelligent gas detectors for a wide
variety of Explosive and Toxic gases.
Main Characteristic
– Microprocessor based
– 4-20 mA output and/or
– Three Voltage free relay contacts output
– RS-485 MODBUS RTU serial interface or
protocol for remote control maintenance
– LCD Display 8×2 characters
– Non Intrusive “One Person” calibration procedure
– Fully programmable
– Small size and Low Power consumption
– Certificate ATEX II 2G Ex d IIC T6
Gas Detectors RAS Series are built in conformity to 94/9/CE ATEX
Directive, included functional performances, moreover they are in
conformity to SIL 2, being suitable to be part of safety systems.
RAS-DY
Aluminium or Stainless Steel Explosion Proof housing with display
– Robust construction
– Built-in or remote sensor transmitter
– Built-in relays enable full stand-alone capability
– Magnetic Keypad to change settings
Bluetooth
Thanks to introduction of Modbus or Bluetooth protocols it is possible to establish a direct communication between the sensor and your PC, PDA or Mobile Phone.
This features allow you a complete control of all sensor’s functional parameters such as Zero, Span, Sensitivity, Alarm Thresholds TWA, STEL and Download maintenance
operations reports or events Log.
MAIN SUBSTANCES LIST (IR Infrared Technology)
SUBSTANCES DESCRIPTION PRODUCT CODE
Methane (CH4) Infrared sensor for fixed detecting systems of explosive substances 0-100%L.E.L. RAS/AD/201/…
Propane (C3H8) Infrared sensor for fixed detecting systems of explosive substances 0-100% L.E.L. RAS/AD/204/…
Carbon Dioxide (CO2) Infrared sensor for fixed detecting systems of CO2 range 0-20000ppm (0-2%v/v) up to 0-100%v/v RAS/AD/279/…
MAIN SUBSTANCES LIST (Catalytic Technology)
Methane (CH4) General purpose catalytic sensor for fixed detecting systems of explosive substances 0-100%L.E.L. RAS/AD/101/…
L.P.G. (Mix) General purpose catalytic sensor for fixed detecting systems of explosive substances 0-100%L.E.L. RAS/AD/102/…
Propane (C3H8) General purpose catalytic sensor for fixed detecting systems of explosive substances 0-100% L.E.L. RAS/AD/104/…
Hydrogen (H2) General purpose catalytic sensor for the detection of H2 0-100% L.E.L. RAS/AD/127/…
Ammonia (NH3) General purpose catalytic sensor NH3 0-100% L.E.L. RAS/AD/140/…
Ammonia (NH3) High Quality catalytic sensor NH3 0-2% v/v (0-20000ppm) RAS/AD/141S/…
MAIN SUBSTANCES LIST (Electrochemical Cells Technology)
SUBSTANCES DESCRIPTION PRODUCT CODE
Ammonia (NH3) Electrochemical Cell for NH3 0-100 / 0-500 / 0-1000 / 0-5000 PPM RAS/AD/340/…
Carbon monoxide (CO) Electrochemical Cell for CO 0-300 / 0-500 PPM RAS/AD/320/…
Hydrogen sulphide (H2S) Electrochemical Cell for H2S 0-20 / 0-100 PPM RAS/AD/369/…
Oxygen (O2) Electrochemical Cell for O2 0-25%v/v RAS/AD/361/…
Sulphur dioxide (SO2) Electrochemical Cell for SO2 0-20 PPM RAS/AD/370/…
MAIN SUBSTANCES LIST (PID Photo Inonization technology)
VOCs Photo Ionization sensor optimised for VOCs 0-400 PPM (Other ranges available) RAS/AD/571/…
OUTPUTS CONFIGURATIONS
Outputs Description Code
4-20 mA + RS485 Analog current loop + Serial RS485 Modbus Protocol AAS (RAS/AD & DY)
3 Relays + RS485 Voltage free contacts 1A 100 Vdc max. + Serial RS485 Modbus Protocol CCS (RAS/AD only)
3 Relays + 4-20mA + RS485 Voltage free contacts 1A 100 Vdc max. + Analog current loop + Serial RS485 Modbus Protocol CAS (RAS/DY only)
GENERAL SPECIFICATIONS
Sensors: Catalitytic pellistor or electrochemical cells or Infrared or chemical absorbtion cell
Code of protection: ATEX II 2G Ex d IIC T6
Location: Hazardous classified areas Zone 1
Degree of protection: IP65 or IP66 when fitted with optional PTFE filter
Short-term repeatability: ±2% FSD 60 min.
Long-term repeatability: ±5% FSD 3 months.
Accuracy(linearity): ±5% FSD
ENVIRONMENTAL SPECIFICATIONS
EMC: According to EN61000-4
Storage temperature: -40 to85 °C
Operating temperature: -20 to 70 °C
Humidity range: 90% R.H. n.c.
MECHANICAL SPECIFICATIONS
Overall dimensions: 170x100x70 mm
Material: Aluminium alloy with chrome plated brass or Stainless Steel
Weight: 0.8 Kg.
Mounting: 2×6 mm holes
Junction box attachment: 3/4″ NPT
ELECTRICAL SPECIFICATIONS
Supply Voltage: 12-30 Vdc
Power consumption: 1 watt (AAS Version)
Supply fuse: 500 mA
Signal fuse: 63 mA
Analog output: 4-20 mA
Load: 0-300 ohms at 24Vdc
Cable Type: 3 conductors cable (4-20mA Version)
Relay Contact Rating: Max. 1A – 100Vdc – 150 mΩ