LoRaWAN Phosphine (PH3) Gas Sensor

Environmental LoRaWAN Phosphine (PH₃) Sensor

xiamen ZONEWU LoRaWAN Phosphine (PH₃) Sensor is a new type of wireless gas sensor based on LoRaTM spread spectrum modulation technology.

xiamen ZoneWu LoRaWAN Gas Sensor PH₃ Sensor Features:

This is a wireless gas sensor, which is very powerful. It can collect data such as the concentration, temperature, and humidity of phosphine gas in the environment, and then keep an eye on the data changes. It can also transmit the data, so that we can know the situation at any time.

It uses LoRa spread spectrum modulation technology, which is very powerful and can enable sensors and other devices to communicate over long distances. In addition, the built-in three-electrode electrochemical gas sensor and high-performance microprocessor work in harmony, the former is responsible for accurately detecting the concentration of phosphine gas, and the latter is like a "little head" that quickly processes the data.

There are sensors specifically designed to detect phosphine gas, which can detect the traces of phosphine gas with great sensitivity, as well as temperature and humidity sensors, which can monitor the temperature and humidity of the environment at all times. In addition, it is equipped with a temperature sensor for temperature compensation, so that no matter how the ambient temperature changes, the concentration of phosphine gas can be accurately measured.

It has a high sensitivity; as soon as there is a slight change in the concentration of phosphine gas in the environment, it can detect it immediately. The resolution is high, and the measured data is accurate to a very small value; It has strong stability and is not easily affected by external interference, and can still work normally in complex environments.

A safety value can be set in advance according to the on-site environment. Once the concentration of phosphine gas detected exceeds or falls below this value, it will immediately report to us so that we can take prompt measures.

It has a wide range of applications, such as monitoring the residual phosphine in grain fumigation in the granary; Chemical enterprises monitor whether there is phosphine hydrogen leakage in the production process; These places, such as sewage treatment plants and garbage disposal sites, can also monitor whether phosphine is produced, ensuring everyone's safety and environmental health. 

Technical Parameters

Product Applications

1. High sensitivity and fast response: This sensor can detect extremely small amounts of phosphine gas and quickly accurately calculate the concentration, and immediately alarm when an anomaly is detected. Quick response and high sensitivity can reduce safety risks and save time for emergency handling.

2. Strong stability: No matter whether the temperature is high or low, the humidity changes, or there are other gas interference around, this sensor can work steadily, without any trouble for a long time, and the data is always reliable.

3. High selectivity: It can accurately distinguish hydrogen phosphide and other similar gases, and will not make mistakes (such as mistaking other gases for hydrogen phosphide), greatly reducing false alarms and missed alarms, and making the monitoring results more accurate and reassuring.

4. It has strong anti-interference ability: Even in a complex industrial environment with various kinds of interference, it can quickly grasp the subtle changes of phosphine and give reliable data to help us carry out environmental monitoring. 

Detailed Images

Common knowledge of  PH₃ 

What is phosphine (PH₃)?What are the characteristics

Phosphine is a colorless, highly toxic gas with a fishy or garlic smell (the smell may be numb and undetectable at high concentrations), flammable at room temperature (explosive when mixed with air at 1.7% to 26%).It is an important chemical intermediate (used in semiconductor doping and pesticide synthesis) and a fumigant for grain storage (such as the hydrolysis of aluminum phosphide tablets to produce PH₃ insecticide), but it has serious toxicity to the human nervous system and respiratory system, and long-term low-concentration exposure may cause liver and kidney damage.

What is the safe concentration limit of phosphine in the air

Occupational exposure limit value (PC-TWA, 8 hours):

• Chinese standard: 0.3 mg/ m³ (about 0.22 pppm);

• U.S. OSHA standard: 0.3 ppm (time-weighted average concentration).

Dangerous concentration:

• At 50 ppm, headache, nausea, and pulmonary edema can occur within hours;

• At 1000ppm or more, it can quickly lead to coma and respiratory failure death.

What are the main sources of phosphine? Why is it easily overlooked

Industrial and agricultural scenarios:

• Grain storage fumigation (phosphorous aluminum releases PH₃ when exposed to water), semiconductor manufacturing, production of yellow phosphorus;

• Sewage treatment plants, landfills (minimal organic matter anaerobic decomposition).

Concealability:

• When the concentration is low, the smell is weak (some people are not sensitive to smells), and the symptoms (such as dizziness and fatigue) are similar to those of a cold, which can easily be ignored;

• In fumigation operations, if the staff is not adequately protected (e.g., not wearing a respirator), they may inhale excessive amounts without noticing it.

What interference factors should be paid attention to when detecting the concentration of phosphine

Other gas interference:

• Hydrogen sulfide (H₂S), ammonia (NH₃), and hydrogen arsenide (AsH₃) may react with the sensor, leading to false alarms;

• Water vapor (high humidity environment) may dilute PH₃ concentration or corrode electrochemical sensor electrodes.

Temperature and humidity:

• Low temperature will reduce the evaporation rate of PH₃, which may cause the detection value to be lower;

• When fumigating with aluminum phosphide, the environmental humidity is high (the hydrolysis reaction requires water), so pay attention to whether the sensor has a humidity compensation function.

Differences in sensor types:

• The electrochemical sensor responds quickly to PH₃ but has a shorter lifespan (about 2 years);

• Infrared sensors have strong anti-interference capabilities, but they are costly and may be interfered with by other phosphorus-containing compounds. 

Application Scenarios

Industrial production

Waste gas emission monitoring: Conduct real-time monitoring of industrial waste gas emissions to ensure that waste gases meet emission standards and reduce pollution to the environment.

 

Environmental inspection

Air quality monitoring helps people understand air quality and protect the environment and health by detecting harmful gases such as sulfur dioxide.

Safety protection

In coal mines and tunnels, gas sensors detect toxic and harmful gases such as methane and warn against accidents.

 

A:Yes,we can provide you with OEM services and design housings and logos.

3.DO you offer free samples?

A:Sorry,we don't offer free samples. After ordering in bulk, we will deduct the sample fee from the second order.

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