Relative pressure transmitter LFT700

siliconMEMS4-20 mA

Product overview
LFT700 pressure transmitter measures pressure, liquid level and density of liquids, gases or steam and converts the measurement to a 4–20mA DC output. Local operation is via three push-buttons; remote configuration is supported via a handheld configurator, PC software or mobile app. Display and configuration changes can be made without interrupting the 4–20mA output.

Features

• MEMS monocrystalline silicon sensing element for traceable measurement.
• Fast response and high stability; typical accuracy ±0.075% F.S.
• Turndown up to 100:1 for flexible range selection.
• Standard HART bus communication with onboard self-diagnostics and remote access.
• High-brightness backlit LCD with reversible in-place display orientation.
• On-site zeroing, zero/span setting and span adjustment functions.
• On-site loop current calibration for field verification.
• Multiple pressure and electrical connection options.
• Output options: 4–20mA, 4–20mA HART, RS485.

Parameters
Measurement ranges: 6 kPa, 40 kPa, 250 kPa, 1 MPa, 3 MPa, 10 MPa
Overload pressure: 6 kPa (400 kPa), 40 kPa (1 MPa), 250 kPa (4 MPa), 1 MPa (6 MPa), 3 MPa, 10 MPa
Accuracy: ±0.075% F.S.
Stability: ±0.2% of upper range
Operating temperature (with display): -20 ~ 70 °C
Storage temperature: -40 ~ 85 °C
Measured media: gases and liquids
Diaphragm materials: 316L, Hastelloy C, tantalum
Electrical configuration: 2‑wire or 4‑wire variants
Output signal: 4–20mA; 4–20mA HART; RS485
Power supply: 12–36 VDC
Electrical outlet: M20×1.5 or NPT1/2 waterproof outlet
Enclosure protection: IP65
Pressure ports: M20×1.5 male, NPT1/2 female, NPT1/2 male, G1/2 male, others available
Pressure type: Gauge (G)
Certifications: Exd II C T6, CE

Dimensions
Refer to the product dimension drawings and images for mechanical dimensions and mounting details.

Technical specifications

• Model: LFT700
• Sensor technology: MEMS monocrystalline silicon
• Available ranges: 6 kPa to 10 MPa (multiple selectable ranges)
• Typical accuracy: ±0.075% F.S.
• Outputs: 4–20 mA (HART option), RS485
• Supply: 12–36 VDC
• Protection class: IP65
• Wetted materials: 316L, Hastelloy C, tantalum
• Local functions: backlit LCD, on-site zero/span, loop calibration
• Applications: pressure, level and density measurement for liquids, gases and steam in process industries