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Alicat Gas Flow Meter: Sourcing High Precision Thermal Vapor Instruments
Quick Answer: Alicat gas flow meters are known for fast response and wide turndown in gas and vapor service. Silver Automation Instruments supplies industrial thermal mass flow meters that match most Alicat performance specs at lower project cost. Send us your gas type, pressure in bar, temperature in °C, pipe size in DN and flow range for a quote within 24 hours.
Why Alicat Appears in Vapor Applications
Alicat gas flow meters use a thermal bypass sensor to measure mass flow directly. Engineers often select Alicat for labs, pilot plants and OEM gas panels. Response time is under 100 ms on many models. That speed matters for vapor recovery tests.
In process lines the situation changes. Pipe sizes grow. Temperatures rise. Explosion proof rules appear. Last year a customer in Vietnam asked for a thermal vapor meter on a DN50 solvent recovery line. The original request named an Alicat device. The process ran at 2 bar and 55 °C. Flow range was 0 to 250 kg/h for ethyl acetate vapor. Silver Instruments supplied a TMF-50-DN50 with 4-20 mA HART. Price was about 30 percent lower than the Alicat quote. The unit has run without drift for nine months.
Key Specifications for Thermal Vapor Instruments
Do not focus only on accuracy. Other specs decide if the device will survive in your plant.
For gas and vapor lines, check these values: Accuracy plus or minus 1 percent of reading plus 0.5 percent of full scale. Turndown ratio 100:1. Response time under 1 second. Output 4-20 mA HART, RS485 Modbus RTU or pulse. Power 24 V DC. Process connection DN15 to DN200 flanges, threads or tri-clamp. Material 316L stainless steel. Protection IP65 or IP67. Hazardous area Ex d IIC T6 or ATEX Zone 1. Temperature range minus 20 to 200 °C. Pressure up to 4 MPa on DN15 to DN50. The electronics include a PT100 reference for zero point stability.
Most engineers skip this part. They assume a lab meter will work on a plant line. In practice, vibration, moisture and long cable runs change the measurement. We have seen this on customer sites many times. Gas viscosity at these conditions is often below 0.02 cP. Thermal mass flow meters do not need density compensation.
Alicat vs Silver Instruments Thermal Mass Flow Meters
Alicat gas flow meters are strong in low flow and clean gas service. Silver Instruments focuses on industrial gas and vapor lines. Both measure mass flow directly. The difference is in packaging and project support.
A typical Alicat unit has a small footprint and a built in display. That is useful for a laboratory. On a hot solvent vapor line in the Middle East, you need a sealed enclosure, an Ex proof housing and a local indicator readable from two meters away. Silver Instruments builds for that environment.
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What to Send Us for a Quote
Do not send a brand name only. We need process data to select the right sensor and flow conditioner.
Send gas or vapor composition, pressure in bar, temperature in °C, pipe size in DN, flow range in kg/h or Nm3/h and hazardous area classification if any.
For example, a chemical plant in Chile asked for an Alicat gas flow meter on a nitrogen blanketing line. The line was DN25, pressure 3 bar, temperature 25 °C, flow 0 to 50 Nm3/h. We quoted a TMF-25-DN25 with 4-20 mA HART and a local display. The customer approved the offer in three days.
FAQ: Alicat Gas Flow Meter and Thermal Vapor Instruments
Can Silver Instruments replace an Alicat gas flow meter directly?
Yes in most industrial gas and vapor lines. Match the process connection, flow range, output signal and power supply. Send us the existing model number or full process data and we will confirm fitment.
What accuracy can I expect on a thermal vapor meter?
Typical accuracy is plus or minus 1 percent of reading plus 0.5 percent of full scale for air and nitrogen. For aggressive vapors like ethanol or acetone, request a factory calibration with the actual gas or a known surrogate.
Do you supply Ex proof thermal mass flow meters?
Yes. Silver Instruments offers Ex d IIC T6 enclosures and ATEX or IECEx certification for Zone 1 and Zone 2 areas. We ship to Southeast Asia, the Middle East, Latin America and Africa.
What is the typical delivery time?
Standard DN15 to DN100 models ship in 10 to 15 working days. Larger DN150 and DN200 models take 20 to 25 working days. For urgent projects we can arrange partial air freight.
How do I install a thermal mass flow meter on a vapor line?
Keep 10 pipe diameters of straight run upstream and 5 diameters downstream. Install the sensor in the upper half of a horizontal pipe for clean gas. For wet vapor, use a drain leg before the meter. Avoid installation directly after a control valve.
Contact Silver Automation Instruments
Tell us your process data and we will recommend a thermal mass flow meter that fits your budget and site conditions. Do not send an email that only says need Alicat gas flow meter price. That is not enough for a proper selection.
Send us your pressure in bar, temperature in °C, pipe size in DN, flow range and gas type. Our engineers will reply with model, accuracy statement and PDF quotation.
Tel: +86-135-1213-1526
Whatsapp: 86-135-12131526
WeChat: +86 13512131526
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