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SensAlert ASI Fixed Point Gas Detector

Advanced Safety Integrity, SIL-2 Certified, Intrinsically Safe

The SensAlert ASI is a gas detection system designed for critical safety applications where protecting personnel, processes, and facilities is paramount. Here’s a breakdown of its key features:

Safety and Reliability

SIL-2 Certified: Independently certified to meet IEC61508 Level 2 (SIL-2) for both hardware and software, ensuring the highest level of functional safety.

Global Approvals: Meets global hazardous area and performance standards.

Test-on-Demand: Built-in gas generator allows for remote functionality checks, verifying system integrity without exposing personnel to actual gas.

Predictive Sensor End-of-Life: Provides advanced warning of sensor failure, enabling proactive maintenance and preventing unexpected downtime.

Versatility

Universal Platform: Supports various sensor types (infrared, catalytic bead, electrochemical) for detecting a wide range of gases, including combustible, toxic, exotic gases, and oxygen level variations.

Flexible Installation: Intrinsically safe or explosion-proof configurations allow for placement in hazardous environments. Options for remote sensors, duct mounting, and sample draw provide adaptability to diverse application needs.

Remote Sensor Mounting: The sensor head can be positioned near potential hazards up to 100 feet away from the transmitter, which can be located in a safe and easily accessible area.

Ease of Use

Simplified Installation: Common installation procedures for all sensor types with vertical or horizontal mounting options. Removable terminal blocks make wiring and commissioning effortless.

Transportable Calibration: Sensors can be calibrated and alarms set up in a safe zone before being installed in the intrinsically safe sensor head, eliminating the need to de-classify the area or interrupt power.

Plug-and-Play Operation: Sensors automatically upload operating parameters and diagnostics upon installation, saving time and minimizing configuration errors.

Sensor Calibration & Exchange Program: Offers convenient delivery of pre-calibrated sensors, reducing maintenance and supply costs.

Sensidyne provides a 3-4 week lead time – not 3-4 months!

Product specifications

SensorsGas Sensors – Electrochemical, Infrared, Catalytic Bead

Test-On-Demand Modules – Type C and Type S

ElectricalVoltage/Power:

2-Wire 24 VDC (18-30 VDC) – 20 mA

3-Wire 24 VDC (12-30 VDC) – 90 mA

With opt. Relay Card and combustible sensors – 300 mA

Output and load resistance with 24 VDC at transmitter terminals:

3 wire 4-20 mA – 600 Ω maximum

2-wire 4-20 mA – 350 Ω maximum

Relay – 3-Wire Only – One SPDT Configurable Relay

Optional Card – Three (3) SPDT Configurable Relays

Contact Ratings – 5 Amps at 115 VAC or 30 VDC Resistive

Communication Link – 4-20mA current, non-isolated 2 or 4-wire options, RS-485 (Modbus), HART

ControlsMagnetic Keypad – ACK, << (Go Back), ▲, ▼

Security – Password Protected Configuration Menu

DisplaysLEDs – Four (4) Red, corresponding to magnetic keypad, and Alarm Relays when equipped.

Graphic LCD – 128 by 64 pixel screen (backlight on 3-wire transmitters); displays Concentration and Measuring Units, Gas Name or Type, Sensor Span, Date and Time, Tag Number and System messages or Warnings

EnvironmentalTemperature (Transmitter): -40°F to 158°F /-40°C to 70°C

Humidity (Transmitter) – 0-90% RH, non-condensing

Temperature (Sensor) – See Sensor Data Sheets

Humidity (Sensor) – See Sensor Data Sheets

Moisture Resistance – IP54; IP56 with optional rainshield

Enclosure OptionsStandard – Blue, Copper-free Cast Aluminum

Dimensions – 6.7” W x 12.2” H x 6.5” D (170 mm W x 308 mm H x 165 mm D)

Weight Range – 6-8 lbs /2.7-3.6 kg

Stainless Steel – Silver, 316 Stainless Steel

Dimensions – 6.7” W x 12.2” H x 6.5” D (170 mm W x 308 mm H x 165 mm D)

Weight Range – 13-16 lbs /5.9-7.3 kg

Long-dome – Gray, Copper-free Cast Aluminum

Dimensions – 6.3” W x 11.7” H x 7.1” D (160 mm W x 297 mm H x 180 mm D)

Weight Range – 7-8.7 lbs / 3.2-4.0 kg

Approval RatingsExplosion Proof – NEC and CEC Class I Div 1, Grps A, B, C, D; Class II Grps E, F, G; Class III T4

Flame proof – ATEX EEx d[ia] IIC T4 II 2 [1] G

Non-Incendive – NEC and CEC Class I Div 2, (Enclosed Break) Groups A, B, C, D; Class II Grps E, F, G; Class III T4 ATEX EEx nC [ia] IIC T4 II 3 [1]

Intrinsic Safety – NEC and CEC Class I Div 1, Grps A, B, C, D; Class II Grps E, F, G; Class III T4 ATEX EEx ia IIC T4 II 1 G

CE Mark – ATEX Directive 94/9/EC

IECEx – Zone 0 – Display Ex d [ia] IIC T4 / Sensor Ex ia IIC T4; Zone 1: Ex d [ai] IIC T4; Zone 2: EXnC [ia] IIC T4

UL / IEC – IEC 60079-0:2006, IEC 60079-11:1999, IEC 60079-15:2007

SIL-2 Certified – IEC 61508 SIL-2 Parts 1,2, & 3 Hardware & Software. Fit for use in SIL-2 applications