Adjustable Flow Control Switch for Gas

Principle
Based on the principle of thermal theory, there are two resistances in the closed probe. One resistance was heated and regarded as detected resistance, the other one was heated and regarded as standard resistance. When the medium is flowing, the heat on the heated resistance will be taken away and the resistances' value will be changed. The differential resistances value is the basis of determining the flow velocity.
Feature
1, No movable parts. 2, Maintenance free. 3, Easy installation. 4, Suitable for variable diameter demand. 5, Switching value can be adjusted continuously. 6, Extremely low pressure loss. 7, Compact structure. 8, LED indicator display flow trend and switch state.

Technical data
Set range: 1…150cm/s( water), 3…300cm/s(oil), 20…2000cm/s(air)
Output: PNP, NPN, Relay, NO+NC (SPDT)
Power supply: 24V± 20%DC or 230V± 15%AC
Switching Current: Max. 400mA(PNP or NPN type ), Max. 4A( Relay type )
Unload current: Max. 80mA
Flow indicator: LED (6)
Set type: Potentiometer set
Proof Pressure range: 100bar
Temperature gradient: 4° C/s
Response time: 1--13s, standard is 2s
Initialization time: 8s
Electrical protection: Reversed-phase, short circuit, overload protection
Protection class: IP67
Medium temperature: -20--80° C
Environment temperature: -20--80° C
Storage temperature: -20--100° C
Connection: M12 connector /2m cable (option)
Material: Probe is stainless steel. Housing is PBT.
Weight: 0.4kg



Packaging & Shipping

Payment Terms
1. Loading Port: Shanghai China
2. Samples Leading Time: 3-7 working days
3. Delivery Time: Within 7-15 days after payment
4. Payment: T/T, Western Union, Paypal

Our Services

After-sales service
We promise to deliver the following after-sales service:
1. Warranty: The warranty period is 12 months starting from the shipping date;
2. Customers will enjoy free repair services for failures found within the warranty due to manufacturing quality;
3. For on-site services not arising from manufacturing quality, we shall charge a certain service fee at our discretion based on actual charges incurred such as travel expense;
4. We provide paid repair services for meter damages not arising from manufacturing quality issues or meter damages not within the scope of warranty.