Relative pressure transmitter LFT2021

absolutepiezoresistive4-20 mA

Overview
The LFT2021 hygienic pressure transmitter employs a high‑performance piezoresistive sensor with an oil‑filled diffused silicon core and an integrated digital ASIC for accurate signal conditioning. The welded 316L stainless steel diaphragm and electro‑polished wetted parts (Ra ≤ 0.8 μm) ensure compatibility with food, beverage and pharmaceutical CIP/SIP cleaning processes. Designed for process control, the transmitter provides multiple electrical outputs and quick‑release process connections to facilitate maintenance and customization.

Features

• High‑precision oil‑filled piezoresistive sensing element for long‑term stability.
• ASIC‑based temperature compensation and integrated heat‑sink diaphragm for media temperatures up to 150 ℃.
• Welded 316L diaphragm; wetted surfaces electro‑polished to Ra ≤ 0.8 μm for hygienic drainage and resistance to fouling.
• Process connections compliant with hygienic standards (e.g., EHEDG, 3‑A); optimized geometry for minimal dead‑space and good drainage.
• IP67 enclosure (with M12) and IP65 (with DIN43650A) to withstand spray cleaning and humid environments.

Specifications
Range: -100 kPa … 0 ~ 20 kPa … 3.5 MPa
Overload pressure: 1.5 × rated pressure
Accuracy: ±0.25% F.S.; ±0.5% F.S. (for ranges ≤ 100 kPa)
Stability: ≤0.5% F.S./year
Operating temperature: -20 to 85 ℃
Medium temperature: -20 to 150 ℃
Storage temperature: -40 to 100 ℃
Temperature effect: Accuracy drift ≤ ±0.2% F.S./10 ℃ @ -20~85 ℃ (≤ ±0.3% F.S./10 ℃ for ranges ≤ 100 kPa)
Measured media: Compatible with 316L stainless steel
Wiring: 2‑wire, 3‑wire, 4‑wire options
Outputs: 4–20 mA; 0–10 V; 0–5 V; 0.5–4.5 V; RS485
Power supply: 8–36 VDC; 12–36 VDC; 4.75–5.25 VDC; 10–30 VDC (variants)
Max power: ≤1 W
Electrical connection: M12 4‑pin circular plug; DIN43650A
Ingress protection: IP67 (M12); IP65 (DIN43650A)
Pressure type: Gauge / Absolute
Certifications: RoHS, CE

Technical data

• Model: LFT2021
• Measuring element: Piezoresistive sensor with oil‑filled diffused silicon core
• Diaphragm & wetted parts: 316L stainless steel, electro‑polished Ra ≤ 0.8 μm
• Available ranges: -100 kPa up to 3.5 MPa (multiple spans)
• Accuracy options: ±0.25% F.S.; ±0.5% F.S. (≤100 kPa)
• Outputs: 4–20 mA, 0–10 V, 0–5 V, 0.5–4.5 V, RS485
• Supply voltages: multiple DC ranges (8–36 VDC, 12–36 VDC, 4.75–5.25 VDC, 10–30 VDC)
• Operating temp: -20 to 85 ℃; medium temp up to 150 ℃
• Protection: IP67 (with M12) / IP65 (with DIN43650A)
• Electrical connections: M12 4‑pin plug or DIN43650A
• Certifications: RoHS, CE