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CID1 Mass Flow Meter: ATEX Certified High-Precision Coriolis Sizing Devices
Quick Answer: For CID1 and ATEX Zone 1 hazardous areas, use a Coriolis mass flow meter with Ex db eb IIC flameproof electronics. Silver Instruments supplies high-precision Coriolis sizing devices from DN15 to DN100 with 4-20 mA HART output. Send your fluid type, pressure in bar, temperature in °C, pipe size in DN, and flow range in kg/h for a quote.
CID1 means Class I Division 1 in North American hazardous zone practice. ATEX Zone 1 is the European classification for the same flammable gas or vapor condition. Many engineers in Southeast Asia, the Middle East, and Latin America use both terms in project specs. Silver Instruments builds Coriolis mass flow meters certified for ATEX Zone 1. These meters also fit many CID1 applications when ATEX and IECEx certificates are accepted by local inspectors.
A Coriolis mass flow meter measures mass directly. It does not need separate pressure or temperature compensation. For a paint plant in Vietnam last year, a solvent dosing line needed a DN15 meter with an ATEX Zone 1 label. The fluid viscosity reached 120 cP. The meter measured 0 to 800 kg/h with an accuracy of ±0.2 percent of rate. We supplied a Silver Instruments SICM series unit with PT100 temperature input and 4-20 mA HART. The plant engineer used the HART signal to set a batch totalizer in the control room.
Sizing a Coriolis meter for CID1 or ATEX Zone 1 is straightforward. You need five data points. Fluid name or type, density if known, viscosity, flow range, and pressure drop budget. Pressure drop budget matters because Coriolis tubes create a small pressure loss. A DN15 meter can handle 0 to 1000 kg/h for water. A DN25 meter can handle 0 to 3000 kg/h. We size the tube ID to keep velocity below a safe limit. This protects the tube from erosion on slurry flows. A juice producer in the Philippines used a DN15 meter for syrup batching. The syrup density was 1.18 kg/L. The meter reported mass flow every 100 ms. That speed allowed the PLC to stop the dosing valve on target.
Silver Instruments supplies CID1 and ATEX Coriolis meters for oil and gas, chemical, water and wastewater, food and beverage, and marine. The meter body is 316L stainless steel. The electronics housing is powder coated aluminum or stainless steel. For offshore platforms, we use stainless steel housing. A distributor in the UAE ordered five DN25 ATEX Zone 1 meters for a jet fuel additive skid. The meters needed 4-20 mA HART and pulse output. We delivered within 18 days. The skid builder calibrated each meter on water and then on the actual additive. The density reading matched the lab value within 0.001 g/cm3. In practice, this repeatability reduces startup time.
Pressure rating for standard SICM series is 40 bar. We
FAQ: CID1 Mass Flow Meter Questions
Question 1: What is the difference between CID1 and ATEX Zone 1?
CID1 is a North American classification for flammable gas or vapor present under normal operating conditions. ATEX Zone 1 is the European classification. Both refer to the same type of hazardous area. Silver Instruments supplies ATEX Zone 1 certified Coriolis meters that many projects accept for CID1 areas when IECEx and ATEX paperwork is provided. Always confirm with your local electrical inspector.
Question 2: Can I use one Coriolis meter for both mass flow and density?
Yes. A Coriolis meter from Silver Instruments measures mass flow, density, and temperature at the same time. The density signal can be used for concentration control in chemical dosing or food blending. For a milk standardization line, a DN15 meter corrected fat content based on density. The density accuracy was ±0.001 g/cm3.
Question 3: What data do I need to send for a sizing quote?
Send us your fluid name, flow range in kg/h, pressure in bar, temperature in °C, pipe size in DN, and any viscosity value. If you have density or specific gravity, include that too. We will output a sizing sheet with pressure drop and accuracy estimate within 1 business day.
Question 4: What output signals are available?
Standard output is 4-20 mA HART. We can add pulse, Modbus RTU, or Profibus PA on request. For fiscal or batch applications, pulse output is common. For PLC integration, HART or Modbus works well.
Question 5: What is the typical lead time?
Standard DN15 to DN50 ATEX Zone 1 meters ship in 12 to 18 days after order confirmation. Larger sizes or special pressure ratings may take 25 to 35 days. We ship by DHL, FedEx, or sea freight to Southeast Asia, Oceania, Latin America, Africa, and the Middle East.
Send us your pressure (bar), temperature (°C), pipe size (DN), and flow range (kg/h) today. Email your request or call our engineers directly. Tel: +86-135-1213-1526. WhatsApp: 86-135-12131526. WeChat: +86 13512131526. Silver Automation Instruments serves distributors and end users across Southeast Asia, Oceania, Latin America, Africa, and the Middle East. We answer sizing questions within one business day.
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