Alicat MC-100SLPM Mass Flow Controller 100 SLPM

The Alicat MC-100SLPM is a laminar differential-pressure mass flow controller with a full scale of 100 standard litres per minute. In the Alicat range-specific table it is an MCP-type device with a 1/4 inch NPT female process connection and a pressure drop of 15.5 PSID at full scale when venting air to atmosphere.

A 100 SLPM controller that reads gas, not just flow

Alicat builds the MC-Series around a laminar flow element and an on-board pressure and temperature sensor, so the controller reports mass flow, volumetric flow, temperature, setpoint and pressure together on its display. It stores 98 gases that Alicat optimised to NIST REFPROP 10 properties, and a COMPOSER function lets you define 20 mixes of up to five gases at 0.01 % composition resolution.

Steady-state control runs from 0.01 to 100 % of full scale, a 10,000:1 turndown, and Alicat quotes control response as fast as 30 ms (T63) for MCP types. The valve is normally closed, so the line shuts when power or setpoint is removed.

Key features as printed in the datasheet

• Standard accuracy 0.8 % of reading plus 0.2 % of full scale; 0.4 % plus 0.2 % high-accuracy option for models up to 500 SLPM.
• Repeatability (2 sigma) 0.2 % of reading plus 0.02 % of full scale.
• Operating pressure 11.5 to 160 PSIA; damage possible above 200 PSIA common mode.
• Digital and analog I/O including Modbus TCP/IP, EtherNet/IP, PROFINET and IO-Link as options.
• Totalizer volume uncertainty 0.1 % of reading.

Technical specification

Performance data (MC-Series, 50 to 12,000 SLPM sheet)

Mechanical, electrical and range-specific data

Selection and ordering guide

The sheet covers 50 to 12,000 SLPM; the 50 and 100 SLPM sizes use the compact MCP body, while larger sizes use MCR or MCRH valves with higher power needs. Alicat notes lower-pressure-drop valves are available, including WHISPER MCW controllers, if 15.5 PSID is too much for your supply pressure.

Specify the calibration gas, the process connection (compression, face seal, push-to-connect, BSPP, SAE or Swagelok-compatible are listed as options), the display type and the communication option when you order, since Alicat builds each unit to order.

Installation and operation notes

The Alicat operating manual states that no straight pipe runs are needed upstream or downstream and that most controllers can mount in any position; units with Rolamite valves (MCR types) must stay upright. Use in-line sintered filters where pressure drop allows, with a suggested maximum particle size of 50 microns for flow ranges of 1 SLPM and above.

Tare the controller with no flow before use, and avoid thread tape or sealant fragments entering the ports. The device is not a safety shutoff.

Applications in Oman and the GCC

A 100 SLPM controller suits gas blending skids, burner and furnace test rigs, emissions-analyser calibration, fuel-cell and electrolyser test stands and instrument-air or nitrogen metering in laboratories. Alicat itself lists oil and gas research laboratories and calibration among its applications; confirm gas compatibility with the wetted materials above.

Compatible accessories and related items

Related Alicat pages on this site include the M-2000SLPM high-flow meter, MW-500SLPM low-pressure-drop meter and PCD-100PSIG pressure controller. Alicat also lists MCS (media-isolated) and MCQ variants.

Frequently asked questions

What is the MC-100SLPM?

A 100 SLPM full-scale laminar DP gas mass flow controller from the Alicat MC-Series, MCP type with 1/4 inch NPT female ports.

How accurate is it?

Standard 0.8 % of reading plus 0.2 % of full scale; high-accuracy option 0.4 % plus 0.2 % for models up to 500 SLPM.

What is the control range?

0.01 to 100 % of full scale, a 10,000:1 turndown.

Which industrial protocols are optional?

Modbus TCP/IP, DeviceNet, EtherCAT, EtherNet/IP, PROFINET, PROFIBUS and IO-Link.

Is Seven Star LLC an ALICAT distributor?

No. Seven Star LLC is an independent supplier in Muscat that sources ALICAT products on request.

Documents and quotation

The official ALICAT datasheet for MC-100SLPM is hosted on this page for download. Seven Star LLC is an independent supplier in Muscat; send your quantity and delivery location through the quotation form and we will quote this item. Please confirm the exact order code, ratings and approvals against the document before ordering. More related products: product category.