MSA General Monitors Observer-i Ultrasonic Gas Detector

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The Observer-i Ultrasonic Gas Detector from General Monitors uses Gassonic ultrasonic technology to instantly detect pressurised gas leaks. This highly precise acoustic detector works when traditional gas detection equipment is not suited or dependent on ventilation.

The GM Observer-i can analyse sounds as low as 12 kHz due to no common high pass filters being used. Broader leak detection can be activated which in turn increases sensitivity to smaller gas leaks, without interference from unwanted background noise.

This detector requires no alarm setpoints or trigger levels to be configured and alarm parameters do not need to be adjusted. Additionally, the Observer-i is backwards compatible with earlier versions of the Observer, thanks to its classic mode setting.

KEY FEATURES

  • Improved detection range and background noise rejection – preventing false alarms
  • Integrated Senssonic self-test
  • The capability of storing faults, sound checks, calibrations, and alarm history
  • Detects gas leaks from 2 bar (29 psi) pressure
SKU: GM-Observer-i Category:

Description

System Specifications
Detector Type Ultrasonic (acoustic) gas leak detector
Background Noise

Rejection Method

 Artificial Neural Network (ANN)
Gas Leak Recognition Method Artificial Neural Network (ANN)
Min. Acoustic Det. Frequency (ANN Mode) 12 kHz
Min. Detection Limit 40 dB (u)
Accuracy ±3 dB
Self-Test Performed every 15 minutes
Min. Pressure Requirement 2 BAR (29 psi)
Detector Coverage (ref. Methane) Enhanced Mode (ANN) (@ 0.1 kg/sec):

FQHI setting (59 dB ANN sensitivity level): 17 meters (56 ft.) Default Ultra-high to medium background noise FQLO setting (54 dB ANN sensitivity level): 28 meters (92 ft.) Medium to low background noise

 

Classic Mode (@ 0.1 kg.sec):

Ultra-high: 7 meters (23 ft.) w/84 dB T.L. High: 12 meters (39 ft.) w/74 dB T.L. Medium: 18 meters (59 ft.) w/64 dB T.L. Low: 24 meters (79 ft.) w/54 dB T.L
Response Time < 1 s (speed of sound)
Approvals Classification ATEX/IECEx: Ex d ia IIB+H2 Gb T6, Ex tb IIIC T85°C Db (Ta = –40°C to +60°C)

 

CSA: Ex d ia IIB+H2 Gb T6, Ex tb IIIC T85°C Db

 

FM/CSA: Class I, Div. 1, 2 Groups B,C,D; Class II, Div. 1, 2 Groups E,F,G; Class III, T5 (Ta = –40°C to +60°C)
Approvals ATEX, CSA, FM, IECEx, CE

 

HART 6.0 registered

 

FM certified to IEC 61508 (SIL 3)
Accessories 1701 Test and Calibration Unit

 

SB100 Bump Test Tool
Device Drivers DDL, DTM available at MSAsafety.com
Warranty 2 years
Electrical Specifications
Input Power 15–36 VDC, 250 mA max.

24 VDC, 170 mA nominal
Relay Ratings 8 A @ 250 VAC
Current Output (sink or source) Status Indications: 0 mA: Start up, no power 1 mA: Pulsed acoustic error 3 mA: Unit inhibit

 

Classic Mode: 4–20 mA, 40–120 dB (u)

 

ANN Mode: 4–12 mA, 40–120 dB (u) 16 mA, warning 20 mA, alarm
EMC/RFI EMC Directive 2004/108/EC

EN 61000-6-2, EN 61000-6-4
Serial Digital Communication HART, Modbus
Cable Requirements Max. cable length between Observer-i and power source @ 24 VDC (20 ohm) 2.08 mm2 (14 AWG) – 1,809 m (5,928 ft)
Environmental Specifications
Operating Temperature Range –40°C to 60°C (–40°F to 140°F)
Operating Humidity Range 10–95% RH, non-condensing
Mechanical Specifications
Housing Stainless Steel AISI 316L
Dimensions 203 x 203 x 201 mm

(7.99 x 7.99 x 7.91 in)
Weight 7.5 kg (16.6 lbs)
Conduit Entries M20 x 1.5 (additional ¾“ NPT adapter available)
Mounting Holes 2 x mounting screws – M8 x 19 max
Ingress Protection IP66 / Type 4X
Standard Configuration OBSERVER i-1-1-1-1-1-1

Brand

MSA

Mine Safety Appliances (MSA), or MSA Safety Incorporated, was founded by mine engineer John T. Ryan Sr. with the goal of creating dependable and safe mining equipment. The company created the electric cap lamp that reduced mine explosions by 75%. Since then, MSA continued to aim to improve workplace safety by creating small first-aid kits, portable methane detectors and various other safety products.

Whether you are looking for specific Mine Safety Appliances products or are searching for high-quality products, instruments and/or equipment to help with workplace safety, discuss your requirements with our team today.

At Dawnthrive Ltd, we can source and supply a variety of safety products by MSA Safety to protect workers from a variety of hazardous working conditions in industries, such as fire service, military, chemical production and more. This includes products, such as:

  • Head protection equipment
  • Fire helmets
  • Firefighter protective clothing
  • Portable gas detection
  • Fall protection equipment
  • Eye protection equipment
  • Hearing protection equipment
  • Thermal imaging

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