Sierra Instruments TM500 PowerMass Thermal Mass Flow Meter
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.
- Features & Benefits
- Applications
- Product manuals
- Product specs
- 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
| 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 |
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