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Thermokon · Pressure sensor · Modbus

DPA+ RS485 Modbus

Name: DPA+ RS485 Modbus
Brand: Thermokon

Modbus RTU differential pressure and air flow transmitter for fan and filter monitoring in ducts, in 250, 2500 and 7000 Pa versions.

Availability and lead time confirmed on your quote

Range: 0 to 2500 Pa

Display: LCD

Version: Dual

Part number705455

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DHL, under 15 kg £13.50 ex VAT
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Specification

Communication

Protocol: Modbus RTU (RS485)
Connection: Plug-in terminal up to 2.5 mm², pressure connection 5.0 or 6.3 mm

Electrical

Power supply: 15 to 35 V DC or 19 to 29 V AC
Power consumption: Max. 2.5 W (24 V DC), 4.3 VA (24 V AC)

Environment

Operating temperature: -10 to +50 °C
Humidity: Max. 85% rH, short term condensation
Protection: IP65 IP rating

Performance

Output signal: 2 x 0 to 10 V or 0 to 5 V, min. load 10 kΩ
Measuring range: 0 to 250 Pa, 0 to 2500 Pa or 0 to 7000 Pa default, by version, with eight selectable ranges each
Accuracy: +/-1 Pa below 250 Pa range, +/-5 to +/-10 Pa up to 2000 Pa, +/-25 Pa above 2000 Pa
Sensor element: MEMS membrane
Nominal pressure: Max. 40 kPa overpressure on air and non-aggressive gases

Physical

Housing material: PC, USE-L enclosure
Mounting: Surface on base with screws, or DIN rail TS35

Part numbers

From the manufacturer's datasheet for DPA+ RS485 Modbus.

Overview

The DPA+ measures overpressure, underpressure, differential pressure and air volume flow of air and other non-aggressive gases. It is used on fans and filters in duct systems, clean rooms, process measurement and control. The measuring range is selectable from eight preset ranges around the default of 250, 2500 or 7000 Pa, and the display unit can be Pa or inch WC, and m3/h or cfm. It has a MEMS membrane element, a Modbus RTU interface and two 0 to 10 V or 0 to 5 V outputs. AZ versions have automatic zero point calibration. The Dual versions are listed separately. LCD models add a colour display with a traffic light function. The USE-L enclosure includes a 2 m PVC hose and connection set.