Absolute pressure transmitter PAD series

differentialpiezoresistive4-20 mA

Overview
The Kobold PAD differential pressure transmitter is a microprocessor-based instrument for measuring differential, gauge or absolute pressure. It offers flexible calibration and output configuration, automatic compensation for ambient temperature and process variables, and communication via HART®. The PAD is available optionally as a flow meter (PAD-F) with totalising and frequency output options.

Highlights

• Measurement modes: differential, gauge, absolute
• High accuracy: ±0.075 % of calibrated span
• Large span ratio: 100:1
• Continuous self-diagnostics and automatic ambient temperature compensation
• Materials: stainless steel (316L), Hastelloy-C®, Tantalum, Monel
• Protection: IP67; explosion-proof enclosures available

Applications

• Process pressure measurement
• Flow measurement by differential pressure (PAD-F option)
• Tank and level measurement

Key features

• 2-wire 4–20 mA output with HART® communication; linear or square-root output
• Optional frequency (pulse) output with selectable pulse width
• Configuration via handheld terminal or PC; parameters stored in EEPROM
• Measuring diaphragm materials: 1.4404 (316L), Monel, Tantal, Hastelloy-C
• Display: 5-digit LCD; mounting bracket for 2" pipe
• Explosion-proof housing options and multiple process connection adapters

Technical data

• Measuring span: 0.75 mbar–413.70 bar (depending on version)
• Accuracy: ±0.075 % of set measuring span
• Span ratio: 100:1
• Process temperature range: -40 °C to +120 °C
• Ambient temperature range: -40 °C to +80 °C
• Storage temperature range: -40 °C to +85 °C
• Power supply: 11.9–45 VDC (17.4–45 VDC with HART®)
• Max. load: 250 Ω at 17.4 VDC, 550 Ω at 24 VDC
• Process connections: 1/4-18 NPT i (optional 1/2-14 NPT oval adapter)

Wetted parts and construction

• Measuring diaphragm: 1.4404 (316L), Monel, Tantal, Hastelloy-C
• Filling fluid: silicone oil or inert filling liquid
• Electronics housing: die-cast aluminium; flameproof Ex "d" option
• Protection class: IP67
• Finish: epoxy-polyester or polyurethane

Certifications & communication

• ATEX options available (Ex II 2G Ex d IIC T6…T5, Ex ia options)
• Communication: HART® protocol

Model

• Model: PAD (PAD-F option for flow measurement with totaliser and frequency output)