Sierra Instruments TM500 PowerMass Thermal Mass Flow Meter

Name: Sierra Instruments TM500 PowerMass Thermal Mass Flow Meter
Brand: Sierra Instruments

Sierra Instruments TM500 PowerMass Thermal Mass Flow Meter

The Sierra Instruments PowerMass TM500™ is a high-performance industrial thermal mass flow meter built for direct gas mass-flow measurement — eliminating volume-to-mass calculations — in both insertion and in-line configurations. Built on Sierra’s robust DigiSense™ sensor design, the TM500 ships with AC or DC power options and field-changeable gas selection through the optional Gas-Mix™ feature.

Accuracy is rated at ±1.0% of reading plus ±0.2% of full-scale on air and nitrogen, and ±1.5% of reading plus ±0.5% of full-scale on other gases, with ±0.2% of full-scale repeatability. TM500-View and on-board TM-Cal validation generate encrypted calibration certificates for compliance with local metrology requirements, and standard delivery runs 2–3 weeks with 1-week delivery available.

Accuracy: ±1.0% of reading + ±0.2% of full-scale on air / nitrogen; ±1.5% of reading + ±0.5% of full-scale on all other gases
Repeatability: ±0.2% of full-scale
Direct mass-flow measurement — no volume-to-mass calculation needed
DigiSense™ robust sensor design
AC or DC power options
Optional Gas-Mix™ — change gas or create gas mixes in the field, no recalibration required
TM-Cal field validation — encrypted pass/fail calibration certificates for compliance
Insertion and in-line configurations — fits both new builds and retrofits
Fast delivery — 2-3 week standard, 1-week available

Industrial process gas measurement
Compressed air management
Wastewater treatment
Energy and utilities
Flare and digester gas applications
OEM and system-integrator gas-flow applications

PRODUCT MANUAL

Gas / Media	Air, nitrogen and other gases
Accuracy	±1.0% reading + ±0.2% FS (air/N₂); ±1.5% reading + ±0.5% FS (other gases)
Repeatability	±0.2% of full scale
Flow / Velocity Range	15 to 45,000 SFPM (0.07 to 212 NMPS)
Turndown	Up to 1000:1 (100:1 typical)
Line Sizes	1.5"–12" insertion; 0.75"–6" inline
Process Temperature	-40 to 250 °F (-40 to 121 °C) sensor; -40 to 158 °F (-40 to 70 °C) enclosure
Process Pressure	740 psig insertion; 500 psig inline NPT; 230 psig 150 lb flange; 600 psig 300 lb flange
Wetted Materials	316 stainless steel
Outputs	Dual 4–20 mA; pulse/alarms; isolated USB 2.0
Power Supply	12–24 VDC; 100–240 VAC, 50/60 Hz
Enclosure Rating	NEMA 4X (IP67), aluminum
Approvals	FM/FMc, ATEX, IECEx, UKEX; CE