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Made for accurate gas flow measurement, this gas mass flow meter reads 5 to 500 SLM with ±1.5% full scale accuracy. It provides a 0 to 5 V analog output and a 4 to 20 mA output for a remote display or controller. Rated to 500 psi (34 bar) through a 1/2" compression connection, it works great for process and laboratory gas monitoring.
Made for accurate gas flow measurement, this gas mass flow meter reads 5 to 500 SLM with ±1.5% full scale accuracy. It provides a 0 to 5 V analog output and a 4 to 20 mA output for a remote display or controller. Rated to 500 psi (34 bar) through a 1/2" compression connection, it works great for process and laboratory gas monitoring.
The FMA1700A/1800A Series eletronic gas mass flow meters provide for monitoring the flow of a wide variety of gases from 10 SCCM up to 1000 SLM. Utilizing heat transfer through a heated tube to measure molecular gas flow rate, the FMA1700A/1800A provides measurement of direct gas mass flow rate, without the need to compensate for variations in gas temperature or pressure (within stated limits).
They are available in an economical aluminum/brass construction for typical gas flows and a 316 SS construction for applications requiring more corrosion resistance. The FMA1700A series without integral display is supplied with a field selectable analog 0 to 5 Vdc or 4 to 20 mA output for remote monitoring; the FMA1800A series has both an integral 3 1/2 digit display and analog output.
Due to their low cost, digital display, analog output capability, and insensitivity to variations in gas temperature and pressure, the FMA1700A/1800A Series are ideal substitutes for many rotameter applications. When used with the FMA178BP portable battery pack, the FMA1800A Series are ideal for in-the-field calibration of flow meters or testing of air sampling equipment.
The electronics are reverse polarity protected and has externally-accessible fusing.
Features
Applications
| Accuracy | ±1.5% of full scale, including linearity over 15 to 25°C and 5 to 60 psia (0.35 to 4.2 kg/cm2) |
| Repeatability | ±0.5% of full scale and for units ≥100 scm from 0 to 20% of range |
| Temperature coefficient | 0.15% of full scale per °C or better |
| Pressure coefficient | 0.01% of full scale per psi (0.07 bar) |
| Response time | 800 msec time constant; 2 seconds (typical) to within ±2% of set flow rate over 25 to 100% of full scale |
| Maximum gas pressure | 500 psig (35 kg/cm2 gage); 1000 psig (70 kg/cm2 gage) for ranges up to 100 SLM; 20 psig optimum |
| Gas and ambient temperature | 0 to 50°C (0 to 122°F) |
| Leak integrity | 1 x 10-9 std cc/sec of helium maximum to outside environment |
| Materials in fluid contact | Anodized aluminum, 316 SS, brass and FKM O-rings |
| Output signal, linear 0 to 5 Vdc | 1000 Ω minimum load |
| Output signal, 4 to 20 mA | 50 to 250 Ω loop resistance |
| Transducer power | 12 Vdc @ 200 mA maximum |
| Compliance | EN55011 class 1, class B; EN50082-1 |
| Maximum flow rate | 500 SLM |
| Range code | 44 |
| Maximum pressure drop | 140" W.C. |
| Integral display | Without display |
| Weight | 2.5 lb (1.1 kg) |
| Accuracy | ±1.5% of full scale, including linearity over 15 to 25°C and 5 to 60 psia (0.35 to 4.2 kg/cm2) |
| Repeatability | ±0.5% of full scale and for units ≥100 scm from 0 to 20% of range |
| Temperature coefficient | 0.15% of full scale per °C or better |
| Pressure coefficient | 0.01% of full scale per psi (0.07 bar) |
| Response time | 800 msec time constant; 2 seconds (typical) to within ±2% of set flow rate over 25 to 100% of full scale |
| Maximum gas pressure | 500 psig (35 kg/cm2 gage); 1000 psig (70 kg/cm2 gage) for ranges up to 100 SLM; 20 psig optimum |
| Gas and ambient temperature | 0 to 50°C (0 to 122°F) |
| Leak integrity | 1 x 10-9 std cc/sec of helium maximum to outside environment |
| Materials in fluid contact | Anodized aluminum, 316 SS, brass and FKM O-rings |
| Output signal, linear 0 to 5 Vdc | 1000 Ω minimum load |
| Output signal, 4 to 20 mA | 50 to 250 Ω loop resistance |
| Transducer power | 12 Vdc @ 200 mA maximum |
| Compliance | EN55011 class 1, class B; EN50082-1 |
| Maximum flow rate | 500 SLM |
| Range code | 44 |
| Maximum pressure drop | 140" W.C. |
| Integral display | Without display |
| Weight | 2.5 lb (1.1 kg) |
