DPT 22SD

Product Description

DPT 22SD Differential Pressure Transmitter & Switch is designed for accurate and reliable differential pressure measurement of liquids and gases in industrial applications. It utilises a piezo-resistive sensor to measure pressure ranges from 35 kPa to 2500 kPa with an accuracy of ±0.25% of full scale. The transmitter provides a 4–20 mA or 0–5 V output proportional to pressure, along with a PNP alarm output (100 mA max.) for switching applications. Featuring SS-316 wetted parts, hermetically welded construction, and IP-65 protection, it ensures durability in harsh environments. Fast response time (<10 ms), software-based zero and span calibration, and high overpressure protection enhance performance reliability. The DPT 22SD is suitable for direct line mounting and demanding industrial process control systems.

Product Parameters

Configure the transmitter and electronics based on application, environment, and compliance requirements.

Sensor Type	Piezo Resistive
Measuring Range	DP URL : 35 kPa to 2500 kPa
Power Supply	12 to 36V DC
Display	LED Display
Output 1	4 to 20 mA DC / 0 to 5 V
Output Load	Max 600 Ω (For 4 to 20mA) / 10K (For 0 to 5V OP)
Output 2	PNP Alarm output (Max. load 100mA)
Accuracy	± 0.25% F. S.
Non Linearity	0.2% of Span
Non Repeatability	< 0.1% of Span
Response Time	<10 mSec for 10 to 90% output change
Over Pressure Safety	2 times max. Pressure range
Burst Pressure	3 times max. Pressure range
Process Temperature	-20 to 120 °C max
Ambient Conditions	Temperature : -20 to 70°C / Humidity : 5 to 95% non condensing
Insulation Resistance	>100 MΩ at 100VDC
Span / Zero Adjustments	Programmable Software Calibration
Process Connection	Refer ordering information
Electrical Connection	4 Pin M12 Female
Mounting	Direct Line mount (Vertical)
Material of Construction	All wetted parts SS 316 (Options available on request)
Enclosure	SS316 with IP 65 Ingress Protection / ABS Plastic
Area Classification	Field Mount Weather Proof IP65
Weight	0.6 kg (Approximate)

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Applications

Electronet instruments are widely deployed across multiple industries and utilities for reliable monitoring and control of critical process parameters.

Industry	Key Applications (DPT 22SD)
Water & Wastewater Treatment	Continuous DP transmission (4–20 mA) combined with automated backwash initiation relay switching across rapid gravity sand filters, pressure sand filters, and intake bar screens.
Automation & Manufacturing	Proportional DP telemetry and emergency shutdown switching on clogged hydraulic return line filters, central lubrication headers, and pneumatic air treatment skids.
Oil & Gas / Petrochemical	Simultaneous DP signal transmission to DCS and high-DP alarm switching across gas filter separators, hydrocarbon basket strainers, and pipeline booster pump suction lines.
Nuclear Power & Power Generation	Differential pressure tracking and safety trip interlocks across condenser cooling water strainers, condensate polisher beds, turbine lube oil filters, and demineralizer vessels.
Textile Industry	Monitoring steam line strainer pressure drops with high-differential alarm relays, process bath recirculating filter clogging, and heat recovery economizer differential pressures.
Pulp & Paper Industry	Pulp stock screening DP telemetry with screen blockage trip protection, paper machine vacuum box DP monitoring, and fresh water intake filter monitoring.
OEM Equipment Manufacturers	Integrated 2-in-1 DP transmitter and switch module for industrial compressor package filters, membrane filtration/RO skids, and booster pump protection assemblies.
Sugar & Distillery Industry	Mixed juice strainer differential pressure monitoring with automated bypass switching, boiler feed pump suction strainer protection, and cooling tower circulating line strainer supervision.