Long-term stability of LARK-1 CH4 sensor

Cross-interference of LARK-1 CH4, CO2 and CO infrared gas sensors

After the release of LARK-1 CH4, CO2, CO series products, NOLINK has made a lot of basic test data, considering the diversity of customer applications. Today we continue to release a set of test data for users to use. Simply put, it is the cross-interference data of CH4, CO2 and CO from sensors of CH4, CO2 and CO.

Response of LARK-1 CH4 to various HC substances

Since the release of the infrared gas sensor LARK-1 CH4, Normalized Core has attracted wide attention, and has also had sales performance and a number of customers.

LARK-1 C6H14 Infrared Gas Sensor

What is C6H14 and why should it be tested? C6H14 is hexane, which is one of the volatile organic compounds and one of the analysis objects of automobile exhaust analyzer. There are about 100 million passenger cars and 100 million commercial vehicles in China, and the VOC emissions from vehicle exhaust are quite large. Only by constantly raising emission standards and reducing VOC emissions from automobiles can our cities see more blue sky and white clouds.

LARK-1 C2H3CL 3.6% VOL Infrared Vinyl Chloride Sensor

In the field of petrochemical industry, vinyl chloride (C2H3Cl) is the basic chemical product and the basic chemical raw material. It is the monomer for the production of polyvinyl chloride (PVC). PVC is the first and second largest general synthetic resin material in China and the world. Because of its excellent flammability, abrasion resistance, oxidation resistance, corrosion resistance, comprehensive mechanics, product transparency, electrical insulation and relatively easy processing, it has been widely used in industry, construction, agriculture, daily life, packaging, electricity, public utilities and other fields. It has a wide range of applications with polyethylene (P E, polypropylene (PP), polystyrene (PS) and ABS are collectively referred to as the five general resins. We usually use plastic shopping bags, agricultural plastic film, are polyvinyl chloride materials.

LARK-1 C2H2 Infrared Gas Sensor

The detection of acetylene (C2H2) has always been difficult. First, the difficulty of detecting acetylene by electrochemistry (EC), catalytic combustion (CAT), metal oxide (MOS) and ultraviolet photoionization (PID) is discussed.

How to Prepare VOC 2018-08-10 with Air Bag in AN-006

The NDIR sensor LARK-1HR i-C4H8 (high resolution isobutylene) developed and manufactured by Normalized Core can be used to detect various kinds of isobutylene. VOC gas concentration, including benzene, toluene, p-xylene, methanol, n-hexane and so on. Equivalent to the use of isobutene i-C 4H 8 as Calibrator of VOC sensor. We measured the cross-response of LARK-1HR i-C4H8 to a variety of VOCs, and at AN-005. The cross sensitivity is given. So how to get a fixed concentration of VOC gas? Simply put, the corresponding VOC The solute and pure nitrogen N 2 of the chemicals can be filled into the air bag according to the calculated amount and wait for volatilization. So how to calculate and use which tools The solute and N 2 are filled into the air bag, which is the content of this article.

Cross Response of AN-005 LARK-1HR i-C4H8 to Various VOCs

The NDIR sensor LARK-1HR i-C4H8 (high resolution isobutylene) developed and manufactured by Normalized Core can be used to detect various kinds of isobutylene. VOC gas concentration, including benzene, toluene, p-xylene, methanol, n-hexane and so on. Equivalent to the use of isobutene i-C 4H 8 as Calibrator of VOC sensor. To detect the concentration of various VOC gases with LARK-1HR i-C4H8 sensor, it is necessary to know The channel corresponds to the cross sensitivity of VOC gas to i-C 4H 8. For this purpose, we measured LARK-1HR i-C4H8 pairs of VOCs. The cross-sensitivity of gas is calculated. The cross-sensitivity data given in this paper can be directly used by customers in need. It should be noted that the data in this paper are only valid for LARK-1HR i-C4H8 sensors developed and manufactured by our company.

AN-004 Negative-Drift Compensation for NDIR LARK-1 EN 19-11-12

LARK-1 reading which is the concentration value of target gas sometimes may be negative when the zero gas is present in the sensor. Why is the gas concentration negative? NDIR sensors almost have a certain degree of zero drift, and they need to be calibrated regularly. Most NDIR sensors have been set a “deadband” to negative reading. However, we don’t set this “dead-band” to LARK-1 raw reading. So, the reading for zero gas may be negative if it drifts down.

AN-003 EN LARK-1 MODBUS PROTOCOL 2022-05-19

The LARK-1 sensor can communicate with a host device via an RS232 interface. We developed RS232-MODBUS Converter for LARK-1 in order to speed up users’ development speed. RS232 of the converter is terminated with LARK-1, and the Modbus terminal is connected to host device. This application note shows how to operate LARK-1 via Modbus protocol using this converter, including LARK-1 information inquiring, data logging, ZERO and SPAN calibration.