GAS DETECTOR INSTRUMENTS

GAS DETECTOR INSTRUMENTS

Leak Meter – CSL Make

Model : LM 293 SF₆

CSL LM 293 is a sensitive SF₆ Leak meter that can measure SF₆ Leak at PPM Levels. The unit is based on Electron Capture Detector combined with the state of the art electronics. This rugged unit is meant for shop floor or field operation.

Quick detection of leaks is achieved by mounting the detector and associated electronics in a hand held gun assembly, which is connected to the portable base unit through a long cable. This ensures a guaranteed response time of less than 3 seconds and provides a visual and audible alarm when the tracer gas is detected.

PRINCIPLE OF OPERATION

The SF₆ leak meter is based on detection by Electron Capture Detection (ECD) which responds only to electron capturing gases. The 300 mC Tritium is used as a radioactive source of low energy b -radiation and is kept inside the detector cell. The b – particles are all stopped with the detector cavity. When pure Argon or Nitrogen (carrier gas) passed through the detector, the b-particles ionizes the gas forming electrons and positive ions. Negative pulse of 1 micro sec. time duration and 6OV potential is applied to the detector electrode. The applied potential drive the electrons to the collector electrode where they are collected and measured as the standing current of the detector,. When an electron capturing gas such a SF₆ came into the detector on the argon stream, the SF₆ molecules will capture on electron. The negative ions formed always have a high probability of discharge on positive ions, thus reducing the electron current. In a new mode of operation the electron current is maintained constant .In this mode sensitivity is constant over a wide range of concentrations. The electron current is controlled in a closed loop control system which various the frequency of the polarizing supply to the detector and the electron current constant in clear Argon. The detector current ‘ld’ and the applied pulse frequency maintains the detector current equal to the reference current. When the electron capturing gas (sample) enters the detector, the detector current decreases, so producing an error. The voltage V subsequently developed indicates a change in the frequency by means of voltage to frequency converter, as this change is feedback so as to keep Id equal to Is. And mean while this error signal is amplified by the instrument and displayed in terms of PPM, which is matching with the concentration of the sample detected.

APPLICATIONS :

Leak Detection From :

Switchgears
Gas Distribution systems
Accelerators
Electrical Equipments.
Study of Ventilation rates in buildings, rooms etc.

SPECIFICATIONS

Sensitivity range : 0.01 PPM to 200 PPM
Display : Digital or analog 0.01 PP.M resolution
Response time : Less than 2 Seconds
Alarm set : 0-100 of selected range
Detector type : Electron Capture (ECD)
Temperature control : 30-100 c +/- 10.lc
Gun Assembly cable length : 5 meter
Ready , Heater ON and alarm LED indication provided
Check detector & Calibration facility provided
Power supply 230 V/ 50 Hz (Optional battery operated. Unit with 9V Nicd Cell.

Mechanical dimensions

WxHxB : 34OX13OX240

Weight : Base Unit 900gms

Gun Assembly 400 gms

CEA Instruments – U.S.A

Gas Baron

We are the authorized dealer for CEA Instruments U.S.A. Series of single gas monitors with interchangeable or dedicated plug-in sensors available for : Carbon Monoxide (CO), Hydrogen Sulphide (H₂S), Chlorine (Cl₂), Sulphur Dioxide (SO₂), Nitrogen Dioxide (NO₂), Nitric Oxide (NO), Oxygen (O₂), Combustibles (LEL), Ammonia (NH₃), Hydrogen Cyanide (HCN), Phosphine (PH₃), Chlorine Dioxide (ClO₂). Many other gases are also a valuable. Large digital display with backlight

Intrinsically safe approvals with RF protection, User adjustable audio and visual alarms for high, low (for Oxygen), STEL and TWA levels low cost and easy to use with simple calibration Lightweight, Compact, rugged and weatherproof Rapid response, reliable and highly specific Alkaline batteries last up to 1000 hours Sturdy pocket or belt clip for hands free monitoring Earphone or Vibrating alarm Jack

Personal Monitors for toxic gas and oxygen

Triple Plus+

*Extremely rugged construction * Loud and Clear alarms * Simple to use * Flexible.Custodian * Rugged construction * Loud and clear programmable alarms * safe to use * Comfortable to wear all day * Detachable nickel hydride battery pack * Flexible functions.

Personal Monitors For Toxic Gas And Oxygen – Custodian

* Rugged Construction * Loud & Clear Programmable Alarms * Safe To Use * Comfortable To Wear All Day * Detachable Nickle Hydride Battery Pack * Flexible Functions.

Wall Mounted Gas Monitor – Guardian

*Direct digital readout controller * Remote gas sensor/transmitters * Maintenance free and reliable *Nema 4X fiberglass enclosures * Multiple gas level alarms and fault alarm * Audio and visual alarm indicators * Local danger alarm at sensor * Auxiliary output relay contacts * System test buttons checks the electronics * Two year full warranty on system (Except oxygen sensor with one year warranty)

Continuous Mini Gas Detector – MD-16

*All-In-One electronics sensor package * Two alarm levels – warning and danger * Flashlight test, Silence and reset of alarms * Audible and visual alarms * Cell failure alarm * Nema 4X fiberglass enclosure * Maintenance Free * Easy Installation * Proven electrochemical sensor technology * Mini size, only 3 ½” x 6”x 3 ½”

Toxic Gas Leak Detectors – Series-U

* Low cost * Audio / visual alarms * Alarm contact relays * Rapid Response * Highly Specific * Explosion proof sensors * Easy to use/maintain * Reliable.

Two Wire Remote Sensor / Transmitter – CEA 420 Series

* Digital display and non display versions are available * Explosion proof housing for sensor and transmitter * Single housing for 12 volt version * Continuous 4-20mA single for output to controllers or PLC * Utilizes unique, patented sensors * Reliable, rapid response and highly specific * Low cost and easy to use and maintain.

Wall Mounted Infrared CO₂ Analyzer – CEA 266

* Digital Readout * Completely self contained with Built-In air pump, water trap and dust filters * Water resistant and dust tight * Heavy duty design * 0-5 VDC and 4-20 mA Linear Outputs * Adjustable high and low level alarms and relays * Easy to install, Operate and calibrate.

Affordable Infrared Carbon Dioxide & Temperature Monitor – CEA 700

* Large, easy to read digital display * Patented dual beam, absorption infrared gas sensor ensures long term stability * CO₂ readout up to 10,000 ppm (1%) * Temperature shown in Eigher ^oF or ^oC * Easily adjustable for altitude changes * Plug in AC adapter for continuous use * Portable up to 80 hours with 4 AA Batteries * Very low cost with fast simple calibration * Completely self contained, durable and lightweight * Flip out stand for desktop monitoring

Affordable Infrared CO₂ Monitor – CEA 144

* Unmatched stability and accuracy * Very Low Cost * Completely Self Contained * Easy to read digital display * Lightweight less than 2 LBS * 0-1 VDC and 4-20 mA Recorder outputs * Simple Gas Calibration * 2 Year Warranty

Portable AC/DC Infrared Carbon Dioxide Plus Monitor – GD-444 Series

* Digital display of CO2 up to 10000 ppm, 10% or 100% as single range or autoranging * IAQ Version also monitors temperature and relative Humidity with optional CO sensor * Many other internal gas sensors available * Pocket Size – Fits in your palm * Battery charger also provides AC power * Built in air pump for fast response * Easy to use internal datalogger option * Adjustable audio and visul alarms * Simple push button operation and calibration * Provided with backlight, recorder output and belt clip

Compact Infrared Gas Analyzer – RI-555

* Non-Dispersive Infrared (NDIR) * Autoranging standatds * 0-0.5% up to 0-100% full scale * Large led digital readout * Compact and lightweight * Auto sampling internal pump * Rugged design * Recorder outputs * Simple to calibrate and operate

Portable AC/DC Toxic Gas Monitor Model – TGM 555

* Truly portable * Continuous on site readout * High Sensitivity * Uses standard chemical procedures * Portable AC/DC or Permanent rack mounting * Lightweight * Rugged for use anywhere * Completely self contained * Recorder output * Easily converted to other analysis.