Technical Specification

LANDTEC’s Thermal dispersion Flow Meter utilizes the constant temperature difference method for measuring Gas Mass Flow Rate. It contains two reference grade platinum RTD sensors clad in a protective 316 SS sheath. It features direct Mass Flow gases, wide range-ability, low pressure drop and a very low end sensitivity.

The LANDTEC ACCU-FLO Meter is microprocessor based, does not have any potentiometers, and has Modbus® RS485 RTU communications.It is powered by 24 VDC (12 VDC, or 115/230 VAC optional). The power dissipation is under 2.5 watts (e.g. under 100 mA at 24 VDC) for the DC version. The power and output terminals are in a separate compartment for ease off installation. LANDTEC’s ACCU-FLO METER is CE approved.

The ACCU-FLO METER features a dual-compartment enclosure for ease of wiring, OLED display that shows Mass Flow Rate, Totalized Flow and Temperature. In addition, the calibration milliwatts (mw) feature is continuously displayed, providing ongoing diagnostics. Outputs include a 4-20 mA signal proportional to Mass Flow Rate, and Pulsed Outputs of Totalized Flow (24VDC solid state [sourcing] transistor drive), as well as Modbus® compliant RS485 RTU communications (IEEE 32 Bit Floating Point).

The Flow Element (Integral and Remote, In-line Style) consists of a choice of 316 Stainless Steel Schedule 40 Flow Bodies sized from 1/4” x 6” long to 4” x 12” long. Male NPT ends are standard, with flanged ends tube, or butt weld optionally available. Note 3” and 4” Flow Bodies have flanged ends as standard.

The instrument calibration is NIST traceable and covers a wide variety of gas calibrations. The LANDTEC ACCU-FLO METER can measure gas flow up to 450ºF (-40ºF to 200ºF standard, up to 450ºF optional on Remote, Insertion Styles) at pressures up to 500 PSIG (1000 PSIG, optional). Accuracy is +/– 0.5% of Full Scale +/– 1% of reading with a turndown of 100:1 and resolution as much as 1000:1. Higher accuracy available with lower turndown (contact LANDTEC).