September 8, 2025
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SAGE PRIMEโข THERMAL MASS FLOW METER FOR GASES
Sage Prime is the top selling meter in our Product Line. The Sage Prime Thermal Mass Flow Meter features a bright, high contrast, photo-emissive OLED (Organic LED) display of Flow Rate, Total and Temperature in a robust, yet lightweight, dual-sided NEMA 4 enclosure. The Flow Rate is also displayed graphically in a horizontal bar graph format. The rear compartment is completely separated from the electronics, and has large, easy-to-access, well marked terminals, for ease of customer wiring (see photo below). It is powered by 24VDC (12VDC optional, or 115/230VAC). The power dissipation is under 2.5 watts (e.g. under 100 mA at 24VDC).
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The Sage Prime Flow Meter is offered in Integral or Remote style (which has lead-length compensation up to 1000 feet as well as an Explosion Proof Junction Box). Specify any standard probe length or ๏ฌow body size. It has a 4-20 mA output as well as a pulsed output of Totalized Flow (solid state transistor drive). In addition, Sage Prime supports full Modbusยฎ compliant RS485 RTU communi cations (IEEE 32 Bit Floating Point).
Sage Prime is CE approved, and CSA, UL approved for Hazardous Service1 (see โApprovalsโunder the โKnowledge Baseโ tab on the website). For ATEX Zone I approvals, request Sage Rio Flyer (SIX Series).
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CONTINUOUS DIAGNOSTICS & FIELD CONFIGURABILITY
Sage Prime has continuous diagnostics. The raw calibration milliwatts (mw) isย
always displayed in the upper left hand corner of the meterโs display. At any time, you can check this reading at a โNo Flowโ (0 SCFM) con dition, and compare the reading to the original re ported โNo Flowโ value noted on the last few lines of your meterโs Certi ๏ฌcate of Con formance or the Flow Meterโs data tag. This in-
situ diagnostic procedure not only checks the sensor performance and the โLive Zeroโ calibration point, but it also veri๏ฌes that the sensor is clean. It essentially provides a means to validate that the meter is oper ating properly, veri๏ฌes thatย
there is no shift or drift, and eliminates the need for annual fac tory calibrations. This simple ๏ฌeld diag nostic procedure, in addition, veri๏ฌes that the sensor is free from contami nation, even without inspection. Although Sage Prime is fully con๏ฌgured upon shipment for the pipe and process cond itions requested, if changes are needed, SageComโข software is optionally available for ๏ฌeld recon๏ฌgurability and performance validation and a printed report.
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MAJOR BENEFITS OF THERMAL MASS FLOW METERS
SPECIFIC BENEFITS OF THE SAGE PRIME
Sage Metering is your source for monitoring, measuring and controlling the gas mass ๏ฌow in your industrial process, building management system or environmental application. Our high performance, NIST Traceable, Thermal Mass Flow Meters will help in crease productivity, reduce energy costs, maximize product yields, and/or help reduce environmental insult.
Sage provides high quality In-Line and Insertion Thermal Mass Flow Meters for a wide variety of industrial, commercial, and environmental monitoring needs, including carbon credit veri๏ฌcation for Greenhouse Gas reduction.
Our experienced application engineers, many of whom have worked in the Thermal Mass Flow marketplace since its inception, will assist you in choosing the proper gas Flow Meter for your applicationโand they will be pleased to offer installation guidance to assure that the meter(s) selected will perform as accurately as possible. Additionally, our Service Staff stand ready to support you with any after-sale assistance that you may require.
PRIME SIP/SRP
Standard accuracy is +/โ 0.5% of Full Scale +/โ 1% of reading with a turn- down of 100 to 1 and resolution as much as 1000 to 1. Repeatability is 0.2%. NOTE: Enh anced accuracy optionally available with limited turn-down4.
The electronics has an isolated 4 to 20 mA output proportional to Mass Flow Rate as well as pulsed outputs of Totalized Flow (24VDC solid state transistor drive6). In addition, Modbus RS485 RTU communications is standard (IEEE 32 Bit Floating Pt).
INTEGRAL STYLE ELECTRONICS7
Electronics is Integral style, with rugged windowed dual compartment NEMA 4 enclosure with local display. The display is a high contrast photo-emissive OLED display, and displays Mass Flow Rate, Totalized Flow and Temperature as well as a graphical representation of Flow Rate in a horizontal bar graph format. In addition, the calibration milliwatts (mw) is continuously displayed, providing ongoing diagnostics.
REMOTE STYLE ELECTRONICS
Electronics is Remote style, with rugged windowed dual compartment NEMA 4 enclosure with display. The display is a high contrast photoemissive OLED display, and displays Mass Flow Rate, Totalized Flow and Temperature as well as a graphical representation of Flow Rate in a horizontal bar graph format. In addition, the calibration milliwatts (mw) is continuously displayed, providing ongoing diagnostics. Includes Remote Mounting Hardware.
The Flow Elementโs Junction Box is Expl Proof (Class 1, Div 1, Groups B, C, D), and does not have any electronicsโonly a wiring terminal block. The Junction Box is connected to the Remote Electronics by 25 ft of lead-length compensated cable. The cable (6-conductor) can be lengthened or shortened without affecting accuracy (max loop resistance 10 ohms, over 1000 ft), if grounded properly, at transmitter.
This is an optional version of Sage Prime offering a separate ground for the 24VDC Power Supply (optional 5VDC or 12VDC Power Supplies) which isolates the Modbus ground from the power supply ground. All other features of Prime PLUS are identical to the standard Sage Prime, except Approvals do not apply at this time.
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