PMC75F differential pressure transmitter

Product Features	Using diffused silicon sensors or metal capacitive sensors, with 0.1% high precision, 10:1 wide range ratio, high stability, and high reliability,
	Equipped with HART communication function, it has an intrinsic safety, explosion-proof, and high static pressure product series, and can be matched with special material isolation diaphragms, suitable for
	Measure differential pressure under high temperature, high pressure, and strong corrosion conditions.

Working principle	The medium pressure acts on the metal isolation corrugated membrane and is transmitted to the sensitive element β chamber through the intermediate silicone oil (see figure), which is sensitive
	The measuring diaphragm of the component senses differential pressure to form a capacitance change, and the differential pressure and differential capacitance are in a linear state
	The measurement circuit amplifies the differential pressure capacitance and converts it into a standard current signal output.

Technical Parameter	·Measurement range	Minimum measurement range (0-150) Pa; Maximum measurement range (0-2) MPa
	·Measurement accuracy	The comprehensive error (including linearity, repeatability, and hysteresis) is better than 0.1%
		1: 1~5:1 range ratio: 0.1% set range,
		5: 1~10:1 range ratio: (0.05%+0.01% × TD)% set range
	·Long term stability	Exceeding 0.15% F.s annually
	·Allowable medium temperature	（-40～110）℃
	·Allow ambient temperature	（-40～85）℃
	·Allow storage temperature	（-40～85）℃
	·Temperature influence	Relative to the standard range of 25 ℃≤± 0.4%
	·Sensors allow Working static pressure	Unidirectional and bidirectional maximum allowable static pressure PN13MPa
	·Temperature influence	Under 100% condition, the impact is ≤ 0.25%
	·Damping	0~40S continuously adjustable
	·Anti vibration	2g 1000HZ ±0.05%g
	·Impact resistance	50g 11mesc
	·Electromagnetic compatibility characteristics	Compliant with IEC801 standard
	·Load characteristics	Corresponding to power supply voltage impedance of 50 Ω~1000 Ω
	·Sensors allow for overvoltage	3 times the standard range pressure
	·Sensor range ratio	10: 1. Continuously adjustable zero point with 100% reverse migration capability
	·Signal output	4-20mA linear output two-wire system with HART communication protocol
		4-20mA square root output two-wire system with HART communication protocol
	·Start time	3S without preheating required
	·Power supply	12V~45VDC
	·Power supply impact	≤ 0.005% V of output range
	·Electrical connection	M4 screw grounding terminal suitable for 0.5~1.5mm ² with cable sealing shell suitable for outer diameter 6~8mm
	·Process Connection	1/4NPT internal thread pressure pipe connection, M10 internal hole thread installation bracket connection
	·Contact with medium	Sensor Ripple Diaphragm: Stainless Steel 316, Hastelloy C
	Partial materials	Sensor sealing ring: Fluororubber EPDMPTFE, Kalrez
		Elliptical flange: stainless steel 316; Hastelloy C
	·Non contact with the medium	Shell: Die cast aluminum strip with epoxy resin coating
	Partial materials	Nameplate: Stainless steel 304; Intermediate liquid silicone oil or anaerobic oil in sensors
		Fastener: Stainless steel
	·On site display	LCD 3 1/2 digital display
	·Protection level	IP66
	·Weight	About 1kg
	·Explosion proof grade	Explosion proof Ex d Ⅱ C T5; Intrinsically safe Ex ia Ⅱ C T5
	·Allow environmental humidity	100%RH

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Exterior structure

load characteristics

R - allowable load resistance (Ω), U - power supply (V)

Electrical connection

The M screw grounding terminal is suitable for 0.5-2mm ² wires and M20 × 1.5 internal thread cable entry holes,

Equipped with cable sealing sleeve for cables with an outer diameter of 6-8mm

instrumentation

a、 Wall mounted installation, b、 Vertical installation of pipelines, c、 Horizontal installation of pipelines

Process Connection (1)

1. [-] Compression end elliptical flange internal thread connection thread standard: process screw hole 1/4-18NP/A installation screw hole M10 [see above figure]

2. [+] Pressure end flat flange or extended flange welded sealing diaphragm structure connection, flange standards: GB123-88 DN50, DN80, DN100

PN4MPa；Extension flange GB9123-88 DN80, PN4MPa, extension 50mm, 100mm, 200mm [see above figure]

Temperature influence

Flat flange diaphragm: DN50+500Pa/10K; Flat flange diaphragm: DN80+500Pa/10K

Extended flange diaphragm: DN80; Extend 100mm+400Pa/10K
Extended flat flange diaphragm: DN80; Extend 200mm+400Pa/10K

The influence of temperature changes on sealed diaphragm pressure transmitters mainly depends on the temperature of the physical properties of the intermediate fluid inside the diaphragm

The coefficient is the sum of the temperature coefficient of the differential pressure transmitter PMC75 and the temperature coefficient of the density diaphragm. The diaphragms listed in sequence below

The temperature coefficient is applicable to silicone oil intermediate fluid.

Process Connection (2)

1. Capillary lock nut pressure rotary welding sealing diaphragm structure: Connection standard: DIN11851-DN50, DN65, DN80PN 2.5MPa

2. Capillary clamp flange welding sealing diaphragm structure: Flange standard: GB9123-88 DN50, DN80, DN100, PN1.6MPa/40MPa [see above figure]

Temperature influence

Lock nut pressure rotary isolation diaphragm:DN50 unidirectional+300Pa/10K;two-way+50Pa/10K

DN65 unidirectional+100Pa/10K;two-way+20Pa/10K

DN80 unidirectional+70Pa/10K;two-way+10Pa/10K

Clamp flange isolation membrane:DN50 unidirectional+300Pa/10K;two-way+50Pa/10K

DN80 unidirectional+70Pa/10K;two-way+10Pa/10K

DN100 unidirectional+70Pa/10K;two-way+10Pa/10K

Order Selection Table