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PORTABLE GAS FLOW CALIBRATION

Model 2601-L  Portable Gas Flow Standard

A compact single-range portable gas flow standard with a 10,000:1 turn-down ratio — a transfer standard accurate enough for the calibration lab and portable enough to carry to the instrument under test.

      TURNDOWN RATIO

        10,000:1

      FULL-SCALE RANGE

  0.5 sccm-25 slpm

         CORROSIVE GAS

      +14 species option

OVERVIEW

The Model 2601-L is a compact single-range portable gas flow standard built for both the calibration laboratory and the field. With a 10,000:1 turndown ratio, one instrument covers a wide span of flow — from very low, leak-level flows up to full scale — so a single 2601-L can stand in for a rack of fixed references. At just 7 lb in a case barely larger than a laptop, it's genuinely carry-anywhere, and battery or 24 Vdc wall power plus a color touch-screen interface make it equally at home on the bench or at the instrument under test.

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The 2601-L supports a broad range of pure gases and gas mixtures, and logs time-stamped flow-rate and pressure data to USB in Excel format for traceable records. A corrosive-gas variant extends coverage to 14 additional aggressive species, so the same platform serves both clean- and corrosive-gas calibration work.

APPLICATIONS

Where the 2601-L earns its place

One portable standard covering gas-flow calibration and verification across laboratory, field, and corrosive-service work.

MFC & flow-meter calibration

Verify and calibrate mass flow controllers and flow meters against a traceable standard.

Leak-test bench verification

Confirm the flow performance of leak-test stands and monitors.

QA & metrology

Repeatable gas-flow measurement for quality and calibration labs.

Field & lab transfer standard

A portable secondary gas flow standard for use on the bench or at the instrument.

Corrosive-gas calibration

With the corrosive-gas variant, calibrate flows across 14 additional aggressive species.

R&D & process development

Accurate low-to-high flow measurement across a 10,000:1 span.

KEY FEATURES

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Built for portable gas-flow calibration

  • Single-range portable gas flow standard with a 10,000:1 turndown ratio — widest range in its class

  • Standard full scales from 20 sccm to 25 slpm; special low-range units to 0.5 sccm

  • Compact and lightweight — just 7 lb (3.2 kg)

  • Battery or 24 Vdc wall-powered operation

  • Color touch-screen interface

  • Time-stamped USB data logging to Excel

  • Supports pure gases and gas mixtures

  • Corrosive-gas variant covering 14 additional aggressive species

  • Standard ¼" compression or ¼" FNPT process connections

  • Optional high-pressure configuration up to 305 psig

SPECIFICATIONS

Model 2601-L datasheet

All units custom-built to order

Flow accuracy                                                                    ±0.6% of reading or ±0.1% of full scale (whichever is greater)

Flow repeatability                                                                ±(0.1% of reading + 0.02% of full scale)          

Rangeability                                                                        0.01% to 100% of full scale (10,000:1 turndown)

 Standard full-scale ranges                                                  20 sccm to 25 slpm; special low-range units to 0.5 sccm

Pressure range                                                                   100 psig, up to 320 psia (high-pressure option)                                                 

Pressure accuracy                                                               ±0.5% of reading after tare

Pressure units                                                                     Absolute or gauge (configurable)

Temperature range                                                               14 °F to 140 °F (−10 °C to 60 °C)

Temperature accuracy                                                           ±1.35 °F (±0.75 °C)

 Power                                                                                   24 Vdc wall adapter or 24 Vdc internal battery pack

 Dimensions                                                                          10.67" L × 9.75" W × 4.86" D

  Weight                                                                                  Approx. 7 lb (3.2 kg)

   Gas compatibility                                                                  Pure gases and gas mixtures; corrosive-gas variant adds 14                                                                                                              aggressive species

Built to your specifications

Every Model 2601-L is custom-built to order. Tell us your gas, your flow range, and your process connections, and we'll configure the instrument to match.

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