PTH804All stainless steel high-precision differential pressure sensor/transmitterIt is assembled using pure imported (American SMI5651) differential pressure chips, and the housing is made of 304 stainless steel structure. The two pressure interfaces are of a Ø 8 tower head structure, which can be directly installed on the measuring pipeline or connected through a pressure pipe. Widely used in the fields of boiler air supply, building fire protection, leak detection machinery, underground ventilation, and pressure process control in the power and coal industries.

Main technical parameters
Range	-100～0～100KPa(The range can be customized according to the actual needs of the user)	Ultimate Overload	200%FS
comprehensive accuracy	0.1%FS、0.25%FS、0.5%FS、1.0%FS	response time	5 mS(rise to90%FS)
output signal	analog quantity 4～20mA(two-wire system)、0～5V、0～10V(Three-wire)Digital OutputRS485(modbusProtocol, four wire system)	load resistance	Maximum current output type800ΩVoltage output type greater than50KΩDigital output based on the actual mounting capacity of the chip
Supply Voltage	24DCV(9～36DCV)	insulation resistance	greater than2000MΩ (100VDC)
medium temperature	-20～85℃, when unmarked, it is at room temperature of 85 ℃ within	Sealing grade	IP65
ambient temperature	normal temperature(-20～85℃)	Long term stability performance	0.1%FS/year
Zero temperature drift	≤±0.05%FS℃	vibration effect	At the frequency of mechanical vibration20Hz～1000HzInternally, the output change is less than0.1%FS
temperature drift	≤±0.05%FS℃	electrical interface	Tightening nut, four flexible and thick core shielded wire, Hirschman plug, etc
compensation temperature	060℃	Mechanical connection (threaded interface)	G1/2、M20×1.5、M22×1.5Wait, other threads can be designed according to customer requirements
Safe Overload	150%FS	External dimensions	M20×Φ26×110mm, Based on actual dimensions

Example of selection guide (complete model: PTH503-30M-mA-0.5-M20-3M-P)
Model code	Measurement range	unit of measurement	output signal	comprehensive accuracy	mechanical connection	Wiring length	With temperature
PTH503	30	M	mA	0.5	M20	3M	P
	Indicate with actual numbers	M=(MPa)	mA=(4-20mA)	0.5=(0.5%FS)	M20=(M20X1.5)	3M=(3 meters)	Equipped with temperature function, it is designed for RS485 digital signal output products and defaults when not configured
		K=(KPa)	10V=(0～10V)	Indicate with actual numbers	M22=(M22X1.5)	Indicate with actual length
		P=(Pa)	5V=(0～5V)		M14=(M14X1.5)
		B=(Bar)	4V=(1～5V)		G1/2=(G1/2)
		mH=(mH20)	R=（RS485）		G1/4=(G1/4)
		mmH=(mmH20)	N=（NB-IOT）		NPT1/4
			G=（GPRS）		ZG1/4
			mV=（mV）		Mark with actual dimensions