Industrial PNP NPN Thermal Explosion-Proof Flow Switch Sensor for Gas and Liquid Measurement

• IP Rating: IP67
• Certification: ISO9001, CE
• Type: Thermal Type
• Media Type: Liquid
• Material: Stainless Steel Cast Aluminum
• Response Time: 1...5s
• Model NO.: QLK400-15
• Protection Level: IP67
• Explosion-Proof Grade: Exdllct6
• Medium Temperature: -2o...7o°c
• Wiring Mode: M12 Connector / Directly Attached 2 Meter Cable Op
• Flow Rate: 1...2000cm/S
• Range: 1...2000cm/S (Water), 3...3000cm/S (Oil), 10...800
• Switch Type: PNP, NPN, Relay
• Power on: 400mA (PNP or NPN Type),3A (Relay Type)
• Power Supply: 24V± 20%VDC
• Transport Package: Standard Carton
• Trademark: XYT
• Origin: Shaanxi
• Production Capacity: 50000/Month

Product Description

QLK400-15 Ex-Flow switch
Based on the thermal principle, the enclosed probe contains two resistors, one of which is heated as a detection resistor, and the other is not heated as a reference resistor. When the medium flows, the heat on the heating resistor is taken away. The resistance value is changed. The difference between the two resistances is used as a basis for judging the flow rate. No moving parts, maintenance-free, easy to install, one model is suitable for multiple pipe diameter requirements. The closing volume is continuously adjustable, with extremely low pressure loss and compact structure. The digital tube displays the flow trend and switch status.

Main Features
Gas-liquid dual-purpose type, can be used in pneumatic and hydraulic systems, can be used for circulating water, cutting fluid and lubricating oil cut-off monitoring and pump idling protection. The flow rate range setting comparison table of different media.
Note: If the customer needs our company to calibrate the flow range before leaving the factory, the medium used and the specific flow must be provided.
 

Medium	water	Oil	Air
Setting range(cm/s)	1...2000	2...3000	10...8000

Product parameters

Setting range:	1...2000cm/s (water), 3...3000cm/s (oil), 10...8000 (air)
Signal output:	PNP, NPN, relay, 4....20mA analog output normally open + normally closed (SPDT)
Power supply:	24V± 20%VDC
Power on:	Maximum 400mA (PNP or NPN type) Maximum 3A (relay type)
No-load current:	Maximum 80mA
Flow indicator:	Four-digit digital display Setting method: button setting
Pressure range:	200bar
Medium temperature change:	<3°C/s
Response time:	1...5s,
Typical value:	2s
Initialization time:	About 4s
Electrical protection:	Reverse phase, short circuit, overload protection
Explosion-proof grade:	ExdllCT6
Protection level:	IP67
Medium temperature:	-2O...7O°C
Ambient temperature:	-2O...6O°C
Storage temperature:	-2O...6O°C
Wiring mode:	M12 connector / directly attached 2 meter cable optional
Material: Probe:	Stainless Steel Housing: Cast Aluminum
Repeatability:	±1% of measured value

Selector chart

 

Thread	G12			G1/2
	G14			G1/4
	M			Customized
Power supply		D		24V±20%
		A		4......20mA
Output			P	PNP
			N	NPN
			G	Relay
			R	normally open + normally closed(SPDT)
Customized		Q		Non standard
Length of probe			K	15mm-60mm

Product structure
Company Profile

 

FAQ

1. How long will you reply to me?
Normally in 1 hours, no more than 12 hours.
2. How can I get the quotation?
Please provide specification and application including sensing element, pressure range, thread connection, pressure type, medium, electronic connection, shell material etc. More details, more accurate quotation and earlier response.
3. Can I get sample?
Contact with our staff online directly and they would check stock for you.
4. Can I visit your factory?
You are warmly welcomed, our factory is located at Baoji city, Shaanxi province, China.
5. Can we use our logo on the products?
Yes, we provide OEM/ODM service.
6. How long is your warranty period?
Warranty period from the date of acceptance of 12 months.
7. What is your terms of payment?
We could accept T/T, L/C, Western union, PayPal, credit Assurance.