Gas detection & Gas detectors

Oxygen, Ozone, Carbon Dioxide, Carbon Monoxide, Methane, Hydrogen, Hydrogen Sulphide, Nitric Oxide, Nitrogen Dioxide, NOx, Ammonia,  Chlorine, Sulphur Dioxide, are only some of the gases being mentioned often.
Gas detection is needed and required wherever gas is used or being presen, such as the Oil refining and petrochemical industry, Construction industry, Steel Industry, Shipping and shipbuilding, Food industry, Pharmaceutical Industry, Electronics industry, Aerospace, laboratories, Universities, hospitals, Firefighting and rescue, Water & Wastewater, etc

Sigma Hellas can offer you a variety of gas devices that cover most applications. Please contact us with details of your application for a quotation.

Gas detectors generally monitor gas concentrations based on the lower explosive limit. This is because even if a gas is present at concentrations exceeding the upper explosive limit, if a gas leakage occurs into the atmosphere, the gas will be immediately diluted and diffuse, bringing concentrations to within the explosive range. The unit %LEL is frequently used to express a concentration with respect to the lower explosive limit (100 %LEL).

Model Sigma 1200HS-EX

The Sigma 1200HS-EX is a Portable Digital Combustible Gases Detector with 0-100% LEL Scale

Features & Specifications
High precision & Reliable measurement
Detection method: diffusion (optionally an external sampling pump can be added, to suit different applications.
Mini size, protected by a compact housing.
It can be used on a belt clip or helmet.
Drop resistant (4-meters), silicone cover protection, dust-proof, dust-resistant, explosion-proof housing.
Full functions
Automatic calibration and reset functions, making detection more reliable and accurate.
One touch to reset the factory setting.
One touch to monitor the battery and voltage
Long usage time
High capacity lithium polymer rechargeable battery (10 hours continuously).
Data storage
It can record 100 alarm data sets, alarm recording can be controlled on the device.
It can record 100,000 sets of detected data and alarm data. Historical data can be checked on the device. (optional).
Alarm mode
- Visual alarm, acoustic alarm and vibration, alarm sound can be turned on or off.
- The alarm point is adjusted to the specific requirements.

Model Sigma 2000 - Portable single or multiple (up to 5) gas detector

Gas Detectors with integrated suction pump

Compact Quick response and high precision device. With built-in suction sampling pump, fast sampling rate and high flow rate, the probe response time is ensured. Unique design, compact size and easy to carry. High strength plastic mechanical housing suitable for different applications and environments.

Specifications
Sensors: Electrochemical, Non Dispersive Infrared (NDIR). Catalytic
Sampling: With internal sampling pump (up to 1L / min)
Accuracy: ± ± 3% F.S. (optionally better accuracy)
Response time: ≤10S
Zero offset: ± ± 1% (F.S. / year)
Display: LCD dot matrix, with gas type display, real-time gas concentration, battery power, time, gas unit.
Temperature: -20 ℃ ~ 50 ℃
Humidity: 0-95% RH (without condensation)
ExibⅡCT4
Degree of protection IP65
Sound alarm: 85dB
Optical alarm: LED, low alarm: blue, high alarm: red
Vibration: the detector will vibrate when it is turned on
The alarm point is adjusted according to customer requirements.
Battery: 3.6V 2300mAh Lithium Polymer Rechargeable Battery, running time is about 12 hours continuously, charging time: 4-6 hours
Dimensions: 205x75x32mm
Weight: 330g
Warranty: 12 months

Partial list of detectable gases

Sigma 3000 - NEW! MULTI GAS DETECTOR
Sigma 3000 series is a high-performance portable gas detector that can detect multiple gases (combustible gases, toxic gases and volatile organic compounds (VOC)) at the same time offering at the same time the "man down" alarm safety function.

Sigma 3000 has operational functions such as one-key security detection, one-key storage, automatic image flipping, etc., optional Bluetooth transmission function allowing safety personnel to obtain real-time data and the alarm status, IECEX, ATEX explosion-proof certification, has passed the antistatic test, and has a protection rating of IP67;  Sigma 3000 with safer product design, faster detection, and compact ergonomic design makes the device easy carry & use; What’s more, the device is also a suction and diffusion dual-purpose instrument. The instrument is mainly working in suction mode however if the air pump fails or in special emergency situations, it can automatically switch to the diffusion sampling method, thereby improving safety to another Level.

The explosion-proof rating of the Sigma 3000 series is Ex ia IIC T4 Ga, which is applicable to the explosive gas mixture zone 0, zone 1, and zone 2 of the factory with grades ⅡA, ⅡB, and ⅡC and temperature group T1~T4.

Features
Rugged and durable
The instrument can effectively resist a three-meter drop
Protection rating of IP67
The instrument has passed the EMC anti-static interference test and can work normally in the walkie-talkie environment
Explosion-proof circuit design, safe and reliable
The instrument has got IECEX, ATEX, and the explosion-proof level reaches Exia IICT4 Ga
Multiple security protection
The man down alarm function for the safety of underground operators.
Password protection function preventing non-operators from modifying menu parameters.
With safety reminder function, sound, optical and vibration alarm function, protecting operators for safer work

The high and low alarm latched function allows the operator to better capture the sudden change of the gas concentration values.
Simultaneous measurement of multiple gases, multiple numerical display
The instrument can detect 1-5 gases at the same time
Real-time value, TWA, STEL, MAX, MIN multiple numerical display
Large screen display, flexible detection system, multiple filtering devices
The screen can be automatically turned 180 degrees, which is convenient for viewing in special operating environments
Built-in powerful sampling pump, for fast detection
Can be connected with external 20m sampling tube, which is convenient for long-distance or confined space detection
Pump suction and diffusion dual use, to provide operators with additional reliable protection
With a water trap filter, it can effectively filter water, oil, dust and other impurities. It can also be used in harsh industrial environments such as coal mines and petroleum fields.
Powerful function, more user-friendly operation, user interface, reasonable and easy-to-use interactive mode
Optional Bluetooth function, data can be transmitted to the mobile phone or PC in real time
Standard storage function, one-click data export, convenient for users to analyze
Unique modifiable ID identification function, convenient for users to allocate and manage the instrument
A full range of automatic detection functions such as automatic prompts for voltage, pump failure alarms, etc., comfortable to use One-key security detection, one-key open storage, automatic image flip
Supports PPM and mg/m³ gas unit switch, the concentration value is automatically converted by the system
Supports each channel sensor to restore the factory setting separately

Specifications
Sampling method: dual - pump suction & diffusion
Gas types: Toxix & Combustible
Resolution: 0.01%VOL、1%LEL、1PPM、1PPM
Response time: ≤30 seconds
Precision: ≤±2%F.S except for special gases
Automatically tests and calibrates after power-on Including reset, maximum value (MAX), minimum value (MIN), STEL, TWA value
Units: PPM and mg/m³ can be switched and displayed by one key, and the concentration value is automatically converted by the system
Display: monochrome graphics (160 x96), screen can be automatically flipped
Backlight: The backlight time can be manually set, and will be turned on automatically when an alarm is issued
Data records: Can store 100,000 sets of data, the storage interval is adjustable from 5 to 3600 seconds, data can be exported, with data cable
Alarm: 95dB buzzer (@30cm), vibration alarm and flashing red LED and alarm status indication on the screen, alarm latched; diagnostic alarm and battery undervoltage alarm, pump block alarm; man down alarm, with early warning and optional real-time remote Bluetooth notification function
Battery: 3.7V rechargeable lithium battery, battery capacity 2200mA
Working hours: More than 15 hours in continuous pumping mode
Charger: Travel charger with DC interface, charging time ≥ 4 hours
Explosion-proof grade: IECEX/ATEX（II IG Ex ia IIC T4,  2004/108/EC（EMC）94/9/EC（ATEX）
CE
Protection rating: IP67
Working temperature: -20℃~+50℃
Humidity: 0～90%RH（no condensation）
Environmental pressure: 86～106Kpa
Dimensions: 157*84.5*59.5mm (including back clip/water trap filter) (length * width * height)
Weight: 365g (including battery, belt clip and filter)

Applications
Confined spaces, Industrial health & safety, Oil and gas, Fire ground “Toxic Twins” detection, Environmental, Chemical, oil and gas (downstream), Telecommunications, Pharmaceutical, food and beverage

SIGMA 8000 Series – Multiple Gas Analyzers (up to 18 gases)

The all in one compact lightweight user friendly analyser that helps users to monitor multiple gases at the same time

The Sigma 8000 Series gas analyzers can detect up to 18 gases at a time. They can incorporate electrochemical, infrared, catalytic sensors, zirconium, thermal conductivity, ions, ultraviolet radiation and other detection principles, focusing on the accuracy of gas detection.
The Sigma 8000 series gas analyzers are also data collectors that can quickly retrieve and analyze the gas concentration components for scientific or university research and complex work environments or applications.

Technical Characteristics
Accurate and reliable gas sensors
Fast warm-up and fast response time
Multiple industrial gas sampling capabilities with ten pump flow options.
The gas detection flow can be adjusted according to different test environments. Each unit is equipped with a multi-level filtering device, which can effectively filter oil, water, dust and other impurities.
3.5-inch LCD screen with 320 * 480 resolution, well-designed and useful menu interface
Ability to display multiple indications
Ability to display one or more curves, data and other indications of gas concentrations that you can change.
Various gas collection units with the possibility of change.

Functionality with many possibilities
Articulated internal structure, supporting 1-18 gas detection requirements
Simple and quick screen settings
Monitoring temperature, humidity and pressure at the same time (Optional)
Ability to select Bluetooth, ZIGBEE, WIFI, GPRS and other wireless modes (optional)
The analyzer can be equipped with a built-in printer or an external Bluetooth printer, to perform the printing function (optional)
High temperature, high humidity measurement (Optional)
DATA RECORDING
High speed storage function (storage space can be customized to your requirements when ordering)
Independent SD memory card, through which historical data can be displayed or deleted
Rechargeable
High capacity rechargeable polymer lithium battery, long life and standby time
Mini-USB interfaces with common data and charging cable
High quality materials

Selected wear-resistant housing material, suitable for various industrial environment applications

Sensors: Up to 18 different sensors can be combined.
Measurement range: 0 ~ 1, 10, 100, 1000, 5000, 50000, 100000 PPM, 0-100mg / L, 200mg / L, 0-100% LEL, 0-10%, 20%, 50%, 99.999% 100% Vol (Measurement range is optional and customised)
Analysis: 0.001 PPM (0-1 PRM), 0.01 PPM or 0.001 PPM (0-10 PPM), 0.1 PPM or 0.01 PPM (0-100 PPM), 1 PPM or 0.1 PPM (0-1000PRM).
1 PRM (0-1000 PRM brain), 0.01 mg / L (0 ~ 200% mg / L), 0.1% LEL (0-100% LEL), 0.01%
Accuracy: ± 2% F.S (higher accuracy optional)
Temperature & Humidity Temperature: -20 to 50 ℃, resolution: 0.1 ℃, Humidity: 0-99% RH, Analysis: 1% RH
Pressure: 0.5 - 2.0 bar (Optional)
Screen: 3.5 inch LCD screen with 320 * 480 resolution
Screen: type, data set, unit, curve, battery power, time, temperature, humidity, pressure (optional), pump status, wireless mode, printer status,
Alarm: vibration, red LED and screen alarm status, error alarm, abnormal pump alarm, low battery alarm
Data storage: An independent SD memory card, Max.32G, automatic data recording function, can adjust the recording time

Signal / data output: RS232, RS485, can be downloaded to the computer in TXT files via USB connection. Optionally it may be equipped with computer software so that users can download, store, analyze and print data
Print function (optional): Optional with internal portable printer or external Bluetooth printer
Print content (optional): Text, graphics, one-dimensional code, qr codes, curves, characters, etc.
Charger: Basic Mini-USB charging port, equipped with a special 13V / 2A charger (internal printer) or standard 5V / 2A charger (external printer)

Battery: High capacity rechargeable lithium polymer battery, 5400 mAh / 11.1V (internal printer) or 10000mAh / 3.7V (external Bluetooth printer), for single gas: 32 hours continuously. for a lot of 6 gases: 24 hours continuously
Humidity: 0 ~ 95% RH (no condensation) (optional filter device is available if there is high humidity)
Temperature: -20 ℃ ~ + 50 ℃, Optional gas sampling probe, can be used for up to 1200 degrees
Protection rating: IP65
Explosive protection: Ex ic IIC T3 Gc
Weight: 3700g
Warranty: 12 months

Applications
Sigma 8000 Analysers can be used in many sectors and applications i.e. petrochemical, chemical, pharmaceutical, environmental protection, air pollution, etc.

Partial list of detectable gases

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