In the Yanshan Petrochemical 30,000 tons per year expansion project, the designer changed the previously used underground sleeve sealing in the central control room to flexible Roxtec sealing solutions.
        Compared to traditional sealing methods, Roxtec looks neat and beautiful. Roxtec solutions also save cables length and simplify future inspection and maintenance. The gastight, explosion- and fire-proof seals prevent fire and toxic gases from entering the room and protect staff and indoor equipment.
SEI engineers, responsible for the project design, appreciate Roxtec:
"It is easy to use to standardize design and increase safety performance."

    The LF-200 zirconia oxygen analyzer was developed for automatic gas filling packaging equipment based on Toray Engineering's long track record with oxygen analyzers for the food packaging industry.
This analyzer is equipped with our unique, compact zirconia sensor to enable stable and highly accurate measurement over the long term, and an oxygen sensor protection mechanism for unprecedented durability. This is an easy to operate, compact oxygen analyzer which is ideal for integration into automatic packaging equipment for foods, pharmaceuticals and other products.

Features

• Protection against oils

The system is equipped with a new type of filter to improve measurement of gases with dispersed oils. The filter can be replaced without removing the analyzer from the panel.

• Suction pump protection function

Enables pump protection while avoiding problems due to on-site cleaning caused by blowing air.

• High-speed response

Internal pipe flow which minimizes gas stagnation at points of measurement.

• Power supply

AC200V is provided standard, for ease of integration into packaging equipment (AC100V is optional).

LF-200 Internal Flow Diagram

Equipment Specifications

Type	Panel-mounted (Portable type is optional)
Display system	Digital 4-digit display (O2 concentration)
Measurement range	１ ppm-100 vol%O2
Display range	0-1000 ppm / 1 / 10 / 100 %, automatic *The 1000 ppm range is not guaranteed
Output range	0-0.5 / 5 / 10 / 100 %, Fixed
Sampling system	Two methods: continuous suction with a built-in pump, and injection *Injection method is not guaranteed
Supply gas rate	1000 mL/min
Sensor gas rate	60 ± 10 mL/min
Gas connection	INLET (Sample gas inlet): Rc1/8 BYPASS OUT (Bypass outlet): Rc1/4 OUTLET 1 (Sample gas outlet1): Rc1/4 OUTLET 2 (Sample gas outlet2): Rc1/4
Reference gas	Air
Weight	Approx. 7 kg
Paint color	Front, back: Silver metallic Cover: Stainless

Characteristics

Repeatability	Within ±1 % of full scale (at or above 0-1 % range) Within ±2 % of full scale (below 0-1 % range) (0-1000 ppm is not guaranteed)
Air point stability	Within ±0.5 % of full scale/24h
Measurement value output	External output: DC 4-20 mA
Concentration alarm output	LED display (Upper/Lower limit) Contact output: 2a individual output Contact: AC 30 V DC 30 V, 0.5 A
Self-diagnosis functions	Warmup error, Thermocouple error Internal temperature error CPU error, Furnace temperature error Asymmetry potential error, Sensor resistance error AIR point calibration error SPAN point calibration error
Sample gas conditions	Must not contain flammable components, halogen, silica, corrosive components or water droplets. Pressure: Pressurized at 0.03 MPa max. Flow rate: 1,000-2,000 mL/min Temperature: 50 °C max. Humidity: Dew point lower than ambient temperature
Power supply	Voltage: AC 200 V, Wired to terminal block Frequency: 50/60 Hz
Set up conditions	Set up location: Indoors, Non-explosion-proof zone Ambient temperature: 0-40 °C Ambient humidity: 45-85 %RH, No condensation
Equipment options	Communication output (RS-232C compliant, unidirectional) Activated carbon filter, Cotton filter Power supply voltage AC 100 V

Engineering Specifications

Related Products

• Oxygen Analyzer for Food Packaging LC-450F
• Gas Flush Packaging Sampling Inspection Type LC-750F

    WIKA has developed a revolutionary overload indicator located on the dial face for easy viewing showing when the gauge has been pressurized past a user defined predetermined value. The overload indicator normally rests in a green band, showing normal operation. When the pressure rises above 10% of the set pressure, the indicator drops into a red band showing the pressure has exceeded the predetermined set point and needs to be inspected.

    A unique feature of the over-pressure indicator is that it can be set anywhere on the dial. The overpressure set point will be shown with a bold red marker on the dial face to indicate the desired set pressure.

    The overload indicator does not prevent operation of the gauge, even when activated. For safety reasons the overload indicator cannot be reset in the field. When the indicator drops into the red band, it locks in place. The bayonet ring is also spot welded to the case to prevent tampering with the overload indicator. The overload indicator can only be reset after the gauge has been evaluated by the factory or a qualified calibration laboratory.

The overload indicator:

• Is primarily used in applications where customers are concerned about overpressure conditions that may affect the performance and calibration of the instrument.
• Is also useful in companies and industries that must adhere to strict quality control standards.
• Allows inspectors to quickly identify problem instruments and have the installation investigated to determine reasons for the overload indication.
• Is especially useful in critical applications that must maintain operation of the instrument to exacting specifications.