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Bios Flow Meter: DryCal High-Precision Gas Calibration Standards
Quick Answer: Bios DryCal flow calibrators work as primary gas calibration standards. They replace mercury soap film methods with a digital optical piston. You get direct volumetric readings from 0.005 sccm up to 50 LPM. Silver Automation Instruments supplies these units for onsite calibration of thermal mass flow meters, rotameters and gas sampler pumps. No soap film mess and no stopwatch timing needed.
Why Gas Flow Calibration Cannot Be Skipped
Many process engineers check their thermal mass flow meters once a year. They lean on the factory calibration certificate. Here is the thing. Meters drift. A 2 % error on a methane line creates billing disputes worth thousands. Silver Automation Instruments has seen this on customer sites in Southeast Asia. A biogas plant in Thailand found their thermal mass meter shifted 4 % in six months. A Bios DryCal gave them a reference point again in under ten minutes.
Gas is compressible. Ambient temperature and pressure swings change the actual volumetric flow. A calibration device that ignores these conditions passes error downstream. The DryCal uses laminar flow elements and precision timing. It generates a direct volumetric reading traceable to NIST. You do not need a soap bubble, a timer and good eyesight. The unit automates the measurement.
Bios DryCal Models That Fit Industrial Flow Meter Shops
Silver Automation Instruments keeps three main Bios DryCal series. The Definer 220 covers 0.005 sccm to 500 sccm. It suits low-flow gas analyzers and microreactor feeds. The head is small enough to fit in a toolbox. Setup takes about two minutes. The Mesa Labs Definer 300 is the mid-range workhorse. It spans 5 sccm to 50 LPM. We recommend this model for calibrating rotameters, thermal mass flow meters and pump samplers.
The Bios DryCal ML-800 handles high-flow verification up to 50 LPM. It matches DN10 and DN15 gas lines. Accuracy is ± 0.25 % of reading. Most engineers skip the dense spec sheet and ask one question: can this calibrate a thermal mass flow meter with 4-20 mA HART output? Yes it can, as long as you can take the meter offline. Connect the DryCal at the outlet. Use a multimeter and a data logger to capture the analog signal. Then compare the meter output against the DryCal value. The whole check takes seconds.
Field Calibration: What a Paint Factory Taught Us
Last year a paint manufacturer in Vietnam came to us with a problem. They had eight thermal mass flow meters on solvent and nitrogen lines. The readings looked inconsistent after three years. We shipped a Bios Definer 300 and a one-page procedure. Their technician bypassed each meter and connected the DryCal to the outlet. The loop took two hours. All eight meters were verified. Two needed a digital correction factor adjustment. The factory avoided three days of downtime compared to sending
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How to Pick a DryCal Without Overthinking It
Start with your gas and flow range. Give us the minimum and maximum flow in sccm or LPM. Tell us the pipe size and the meter connection. If you work with aggressive gases, we can suggest a stainless steel flow path adapter. Do not assume all meters work with air calibration. Some gases need correction factors. The DryCal itself measures volumetric flow. For mass flow you must enter temperature and pressure conditions. Most field engineers have a pressure gauge and a thermometer nearby.
We also supply a complete calibration kit. It includes the DryCal, a power adapter, tubing and a carrying case. The whole kit weighs under 3 kg. You can bring it to a wellhead, a gas blending station or a lab bench. In practice, many users in the Middle East rely on it for flare gas meter checks. They like the battery life, about eight hours of continuous operation.
FAQ
What is the difference between the Bios DryCal and a soap film flow meter?
A soap film meter needs manual timing and a soap solution that can foul sensors. The DryCal uses a precision optical piston and gives a clean digital readout. The data can be logged via RS-232. No mess, no operator drift.
Can the DryCal calibrate a Coriolis mass flow meter for gas?
Yes, for low-flow gas applications the DryCal can act as a reference volumetric standard. For liquid Coriolis meters you need a different calibration rig. We help you match the standard to your meter.
How often should we recalibrate the DryCal unit?
Bios recommends an annual recalibration. Silver Automation Instruments provides a NIST traceable recalibration service. Turnaround time is about ten business days.
Do we need special fittings to connect the DryCal to our flow meter?
Usually barbed tube fittings or quick connect adapters work for small tubing. Send us your meter process connection size and we will include the right adapter in the quote.
Which gas types are compatible with the DryCal?
The standard model handles non-corrosive gases: air, nitrogen, argon, natural gas. If you need to measure reactive gases we can supply an inert wetted material option. Always state the gas composition when you request a quote.
Request a Bios DryCal Quote from Silver Automation Instruments
Tell us your gas flow range in sccm or LPM, your pipe size (DN) and the model of the flow meter you want to verify. We will pick the right DryCal model and send a price within 24 hours. We deliver to Southeast Asia, Oceania, Latin America, Africa and the Middle East.
Contact Silver Automation Instruments:
Tel: +86-135-1213-1526
Whatsapp: 86-135-12131526
WeChat: +86 13512131526
Email: [email protected]
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