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GT1600 Series Glass Tube Variable Area Flowmeters for Gases & Liquids

Simple, rugged design for moderate accuracy requirements. Replacement for GT1000, GT1300 & Full-View® models.

The GT1600 Series glass tube VA flowmeters are a NEW family of meters with a rugged design for long-lasting performance with low and high-flow clean gas and liquid applications where viewing the process is important. These versatile and economical meters are for general use in applications with moderate metering accuracy requirements — typical accuracy ranges are 1% to 10% full scale, depending on the model selected. They are ideal for purge type service, seal oil systems, bearing lubrication and cooling water indication.

The GT1600 Series flow meters are configurable to retro-fit existing Brooks Instrument GT1000, GT1300 and Full-View® 1100 Series meters (models 1110, 1114, 1140, 1144).


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GT1600 Series Data Sheet


  • Configurable to retro-fit GT1000, GT130x and Full-View® models
  • 316 stainless steel frame, polycarbonate safety shield and 316/316L dual certified stainless steel process fittings
  • Process connections can be rotated 360°, 180° viewing window, panel or wall mount option
  • Alarms for high and low-flow (optional for all flow ranges); Purchase at time of order or add it in the field
  • Choose from multiple accuracy levels
  • Flanged or threaded connections available (horizontal and vertical)
  • Adjustable scale to compensate for process variation


  • Premium materials of construction ensure safety, indoor and outdoor durability
  • Easy installation and viewing at any angle
  • Monitor critical flow conditions with optional alarms
  • No power required; reduces installation cost and provides flow measurement in hazardous areas
  • Easy in-situ maintenance: Clean or replace tube & float without removal from the process piping
  • Optional integral valve minimizes connections reducing leak points


  • Industrial processes
  • Pharmaceutical production
  • Chemical manufacturing
  • Burner control
  • Water treatment and distribution systems
Product Type

Glass Tube VA Flow Meter


Ideal for clean liquids and gases

Configurable to retro-fit GT1000, GT130x and Full-View models

Rugged design for indoor or outdoor use

Durable, even in harsh or hazardous environments

Flow Range (Full Scale Capacity)

Up to 0.41 gpm / 4,900 lph

Up to 150 scfm / 270 m3n/hr

See Capacity Tables in Data Sheet


Standard: ±10%, ±5%, ±2% Full Scale, Class 2.5 acc VDI/VDE

Optional: ±1% Full Scale, Class 1.6 acc VDI/VDE


≤0.5% Full Scale

Metering Tube Material

Borosilicate Glass


Transparant scale. Adjustable.
Scale Length
75mm, 127mm and 250mm
Scale Graduations
Choice of direct reading units, millimeter or percentage of maximum flow with factor tag.
Window Material

Polycarbonate with UV Inhibitor


Float Material

Sizes 2 & 6:  Carboloy® or 316/316L (dual certified stainless steel)

Sizes 7-10:  316/316L (dual certified stainless steel)

Float Stops
316 stainless steel
End Block Options
316 stainless steel
O-Ring Materials





Connection Materials
316 stainless steel
Process Connections
316 stainless steel
Max Pressure
Refer to Maximum Pressure Ratings Table in Data Sheet
Max Temperature
121oC (250oF)
PED Categories

Meets PED

Ambient Temperature Range
-20–52°C (-4–125°F)
Fluid Temperature Range
1–121°C (33–250°F)
Diagnostics & Display

Tube Sizes 2 & 6: Ring Initiator High/Low Alarm

Tube Sizes 7-10: Reed Switch High/Low Alarm

Hazardous Area Approvals:

Zone 1/Zone 2 (CSA/ATEX/IECex) - gas/dust. Protection method Ex-m (no barrier).

Div 1/Div 2 (CSA) - gas/dust. Protection method I.S. / Non-incendive


International Calibration Certificate (ICC)

Material Certification to DIN 3.1

Declaration of Compliance 2.1 Oxygen Service

Filename File Type Documents By Language
Data Sheet pdf English French German Japanese
Installation & Operation Manual pdf English
Quick Start Guide pdf English

Use the following guide (model code information from data sheet) to translate the CAD configurations available below. If you need assistance or can’t find what you’re looking for, please contact Applications Engineering or your local Brooks Instrument representative.

Example: 1600 - JC - 2 - AA - 0 - 0

Meter Series
 Max Flowrate
 Connection Size   Connection Type  Valve Type  Alarm
 1600  JC
 AA  0  0