『ADM Flow Meter Agilent: Laboratory Chromatography Gas Flow Verification』Related information(clamp on meter|electromagnetic meter|venturi meterrotameter|orifice meter|ultrasonic flow meter|mass flow meter|coriolis mass flow meter|coriolis flow meter|magnetic flow meter|magmeter flow meter|magflow flow meter|mag meter flow meter|electromagnetic flow meter|vortex flow meter|turbine flow meter|thermal mass flow meter|thermal flow meter|rotameter flow meter)
ADM Flow Meter Agilent: Laboratory Chromatography Gas Flow Verification and Silver Instruments Options
Quick Answer: The Agilent ADM flow meter measures low gas flow rates in laboratory chromatography systems. Typical carrier gas checks run from 0.5 to 100 mL/min for capillary GC columns. Silver Instruments supplies thermal mass flow meters and calibration support for similar gas flow verification without long lead times.
Where the ADM Flow Meter Fits in a GC or HPLC Lab
Gas flow verification is a routine task in gas chromatography. A small error in carrier gas flow changes retention time and peak area. In practice, many labs check the flow at the split vent, septum purge, and detector lines. The Agilent ADM flow meter is a compact device that reads volumetric flow directly. Most engineers skip this part only when the GC method is locked down.
We have seen this on customer sites many times. A food safety lab in Vietnam checked nitrogen flow for a GC system last year. The reading was 5.2 mL/min instead of 5.0 mL/min. That small drift caused a retention time shift in pesticide analysis.
Agilent ADM Flow Meter Range and Typical Values
The Agilent ADM flow meter works well for low gas flows. It is often used from 0.5 mL/min up to 1000 mL/min. Helium carrier gas through a 0.25 mm ID column usually runs at 1.0 to 2.5 mL/min. Hydrogen fuel gas for a flame ionization detector often runs at 30 to 40 mL/min. Air flow for the FID can reach 300 to 400 mL/min. Make-up gas sits between 25 and 40 mL/min.
A thermal mass flow meter from Silver Instruments can cover these ranges. One recommended pairing is the Silver Instruments TMF-20. It measures gas flow from 0.2 to 20 slpm. You can specify 4-20 mA HART output, PT100 compensation, and a 1/8 inch Swagelok fitting. The unit accepts air, nitrogen, hydrogen, and argon. For hydrogen service we offer stainless steel body and ATEX Zone 1 approval.
Why a Dedicated Gas Flow Meter Beats a Rotameter
A rotameter is cheap. But it is not a verification tool. It has no digital output and no temperature compensation. A thermal mass flow meter reads actual gas mass flow. It does not need pressure and temperature correction for most lab checks. The readout is direct. That matters when a QC laboratory must prove that the GC system remains within method limits.
So if your current ADM flow meter is out for calibration, you need a backup. Silver Instruments can ship a TMF series unit with a calibration certificate. The certificate includes traceability to factory standar
How to Specify a Gas Flow Meter for Chromatography
Send us the gas type. Tell us the flow range in mL/min or slpm. Include the inlet pressure in bar and the operating temperature in degrees Celsius. The fitting size matters. Common connections are 1/8 inch and 1/4 inch Swagelok. If you need a hazardous area rating, mention Zone 1 or Zone 2. The output signal is also important. Many labs use 4-20 mA HART for integration with a data system.
Here is the thing. A low flow gas meter has different sensor design than a high flow industrial meter. Do not use a 200 slpm industrial thermal meter for a 2 mL/min carrier gas check. You will lose accuracy at the low end. We can help select a model that matches the range you actually use.
FAQ
Can Silver Instruments supply a direct replacement for the Agilent ADM flow meter?
We do not use the Agilent trademark. We supply a thermal mass flow meter with similar gas flow ranges and connection options. Send us your current fitting type and flow range so we can check compatibility.
What flow range is typical for GC carrier gas verification?
For capillary columns the normal range is 0.5 to 10 mL/min. Some packed columns and detector checks can go up to 1000 mL/min. A flow meter with a wide turn down ratio works best.
Do you offer digital communication for these flow meters?
Yes. Standard options include 4-20 mA HART and RS485 Modbus. Some models support Bluetooth data logging. The TMF series can store calibration data in non volatile memory.
Can the flow meter handle hydrogen gas safely?
Yes. We supply stainless steel body construction with PTFE seals for hydrogen service. ATEX Zone 1 and Zone 2 configurations are available. Tell us the hydrogen flow range and inlet pressure before ordering.
What information should I send for a quote?
Send us your pressure in bar, temperature in degrees Celsius, pipe size in DN, and flow range. Also include the gas type, fitting size, and any hazardous area approval. We will respond with a specific model and price.
Contact Silver Automation Instruments
Tel: +86-135-1213-1526
WhatsApp: 86-135-12131526
WeChat: +86 13512131526
Send us your pressure (bar), temperature (°C), pipe size (DN), and flow range. A sales engineer will reply with a model and quotation for your laboratory gas flow verification project.
Hot Product
Related AD
