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SiemensElectronic Air Differential Pressure Sensors

Siemens Differential Pressure Sensor: 0.65 in wc to 0.65 in wc, ±0.40% Accuracy

The Siemens 590-781 is an electronic air differential pressure sensor with a range of 0.65 in wc to 0.65 in wc. It features a 4 to 20mA output, ±0.40% accuracy, a loop resistance of 100 ohms, and requires 0 to 10V DC…

SKU 3G-OTH-68516

Brand
Siemens
Item
Differential Pressure Sensor: 0.65 in wc to 0.65 in wc, ±0.40% Accuracy
Category
Electronic Air Differential Pressure Sensors
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Technical Specifications

Siemens
Manufacturer Part Number
590-781
Type
±0.40% Accuracy, 4 to 20mA
DC
0 to 10V
Output
4 to 20mA
Accuracy
±0.40%
Power Required
0 to 10V DC
Loop Resistance
100 ohms
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Siemens Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The Siemens 590-781 is an electronic air differential pressure sensor with a range of 0.65 in wc to 0.65 in wc. It features a 4 to 20mA output, ±0.40% accuracy, a loop resistance of 100 ohms, and requires 0 to 10V DC power.

Frequently Asked Questions

What is the Siemens 590-781 differential pressure sensor used for?

The Siemens 590-781 electronic air differential pressure sensor measures low air pressure differences in HVAC systems, clean rooms, and industrial ventilation. It outputs a 4 to 20mA signal with ±0.40% accuracy, enabling precise monitoring and control of air flow or filter status.

What are the specifications of the Siemens 590-781 differential pressure sensor?

The Siemens 590-781 has a range of 0.65 in wc to 0.65 in wc, ±0.40% accuracy, and outputs 4 to 20mA with a loop resistance of 100 ohms. It requires 0 to 10V DC power. This electronic sensor is designed for air differential pressure applications.

Where to buy the Siemens 590-781 differential pressure sensor worldwide?

3G Electric supplies the Siemens 590-781 differential pressure sensor to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this precision air pressure sensor.

How to install the Siemens 590-781 differential pressure sensor?

Mount the Siemens 590-781 in a dry location with the pressure ports oriented downward to prevent moisture ingress. Connect the 4 to 20mA output to a controller with a loop resistance of 100 ohms or less, and supply 0 to 10V DC power. Follow standard HVAC sensor installation practices.

Used in

Common applications for Siemens
District cooling plants — LME73 + RWF55 for condenser-water modulation
Inflight catering and food-processing steam boilers — LMG22 with SQN90 air-fuel cross-damper
Hospital steam-plant redundancy — LME41 with QRA2 UV flame detection for dual-fuel boilers
Semiconductor fab process heat — LME23 and SKP55 gas valves on hot-oil heater skids
Container-terminal reefer-deck heating — LMG22 retrofit onto legacy burner racks

Siemens Products

3G Electric supplies Siemens electronic air differential pressure sensors. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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