Friday, February 26, 2016

A Universal Transmitter for Toxic, Oxygen and Combustible Gas Detection

Universal gas monitor
Universal gas monitor
(courtesy of Honeywell)
The XNX Universal Transmitter, now with HART EDDL, marks a new turn in gas detection from Honeywell Analytics. It supports the widest range of sensors on a common platform and offers a modular choice of inputs and outputs.

XNX is designed for flexible integration, simple installation, user-friendly operation and straight-forward maintenance. It is ideal for use with a range of gas monitoring controllers or industry standard PLCs. The introduction of our HART Enhanced Device Descriptor Language (EDDL) software provides users with an at-a-glance indication of the health of their gas detectors in the field.

Universal gas monitor options
Universal gas monitor options
Supports the widest range of sensors on a common platform and offers a modular choice of inputs and outputs (saving customers time and money).

  • Flammable gas detection 0 to 100% LFL/LEL
  • Flexible operation options
  • Minimal training required

  • Material: LM25 aluminum, painted (SS316 painted optional)
  • Temperature: -40° to +65°C / -40° to +150°F (sensor dependent)
  • Humidity: 20 to 90% RH (non-condensing) 

Wednesday, February 17, 2016

Quad O on Storage Tanks with Safety Equipment Playing Vital Role in Reducing Tank Emissions

Vacuum & Positive Pressure Relief Prevents Leakage
Vacuum & Positive Pressure Relief Prevents Leakage
Quad O” is an abbreviation for EPA 40 Code of Federal Regulations, Part 60, Subpart OOOO. The EPA has new emissions standards defining what processes and equipment are affected, and by when. Emissions of volatile organic compounds (VOC’s) contribute to the formation of ground-level ozone, or smog. with a wide range of health concerns. Fracking (the hydraulic fracturing of shale rocks to release natural gas) set the stage for the EPA to re-examine emissions standards. The final Quad O regulation was issued on August 16, 2012, but as of January 29, 2016 changes continue to be proposed and many of the original deadlines have been extended.

Quad O applies to all onshore oil & gas facilities constructed, modified, or re-constructed after August 23, 2011.

The affected facilities include:
  • Storage vessels (tanks)
  • Hydraulically fractured well completions
  • Continuous bleed pneumatic controllers
  • Reciprocating and centrifugal compressors
  • Equipment leak detection and repair
  • SO2 sweetening units
  • Glycol dehydrators
Tanks that emit more than 6 tons of VOC’s (volatile organic compounds) per year are considered affected facilities. Per Quad O, emissions need to be reduced by 95%. Emission control devices such as closed vent systems, enclosed combustion devices, and vapor recovery units are outlined in the regulation. In addition to these, Tank Safety Equipment can help in the reduction of VOC’s. Tighter sealing pressure valves and gauges translate to lower emissions. When vapor control systems are used, Tank Safety Equipment plays an important role in providing the delivery of vapors to the system, limiting the amount of vapor release, and in protecting it through the use of arrestors.

Here are active ways you can improve your Quad O compliance by choosing these tank sealing and venting solutions:

Pressure Vacuum Relief Valves
High-performance sealing power for maximum protection against leaks and emissions.

Thief and Gauge Hatches
Ultra-tight sealing for maximum emissions control.

Emergency Relief Vents
Advanced sealing technology that exceeds the most stringent industry standards.

Flame Arrestors
Maximize safety with protection against flame propagation and detonations.

Vent Valves
The highest level of protection against leakage and emissions.

The video below provides more specificity on what kind of products are used for this purpose.

For more information, contact:
Arjay Automation
1178 E. Cliff Road
Burnsville, MN 55337-1577
Phone (800) 761-1749
Fax (612) 861-4292

Monday, February 8, 2016

Information Required When Specifying a Thermal Mass Flowmeter

thermal mass flowmeters
Thermal mass flowmeters
inline style (left) and insertion style (right)
(courtesy of Eldridge Products, Inc.)
When determining the proper thermal mass flowmeter, you must have details of your flow conditions so the flowmeter will be optimally matched to your application. Beyond the normal information such as gas, line size, temperature and pressure, power input, etc., be prepared to know the following:

Process Gas Composition — This is simple if you are flowing air or a pure gas such as hydrogen, nitrogen, etc. Gas mixtures should be provided with each gas listed as a percent of the total, with the sum equalling 100%. It is possible to calibrate your thermal mass flowmeter with the actual gas your sensing. When this is not possible, a gas or gas mixture with equivalent heat transfer characteristics is used instead.

Full Scale Flow Rate — Although its difficult to know the exact maximum flow rate (Full Scale), its important to provide an estimate for the calibration. If the Full Scale is not known, it is best to over estimate a flow. This information can be in units of mass flow (SCFM, Lbs/Hr, NCMH, etc.) or velocity (SFPM, MPS, etc.).

Line Size — Irrespective of using an in-line or an insertion style thermal mass flowmeter, its mandatory to know your process line size.

Process Gas Pressure and Temperature — Thermal mass flowmeters must be calibrated to conditions as close to the actual process conditions as possible. Therefore, knowing the process pressure and temperature conditions is required.

inline thermal mass flowmeter
Inline style thermal
mass flowmeter
Ambient Conditions for Sensor Electronics — Making sure the thermal mass flowmeter electronics are in the proper environment assures performance and long life. Conditions such as high temperature, hazardous locations, exposure to dirt or spray-down all need to be considered. A wide variety of options exist to compensate for differing environmental conditions.

Input Power Supply — What power is available for the thermal mass flowmeter? AC voltage? DC? Typically thermal mass flowmeters are powered by 24 VDC or 115 VAC, with 230 VAC as an option.

Probe / Body Configuration — Inline configuration or an insertion style flowmeter? Inline styles have the sensing elements mounted directly in the flow section for exposure to the process gas. With insertion style thermal mass flow meters, the probe assemblies is inserted directly into any suitable flow section, pipe, duct, etc.

insertion thermal mass flowmeter
Insertion style thermal mass
flowmeter with BVR

Inline style flowmeters typically are provided in line sizes from 1/4" to 4" with a number of installation options such as MNPT ends, ANSI of DIN flanges, etc. Insertion style flowmeters can be used in line sizes of 2" or greater and can be mounted with ball valve retractor assemblies, compression fittings, pipe nipples, etc. When using inline style, a device called a “ball valve retractor assembly” (BVR) is used when it is desirable to provide a means of flowmeter removal while keeping the process line running. This so called “hot-tap” device is an excellent way to minimize downtime when servicing or calibrating the flowmeter.

One final consideration for selecting a thermal mass flowmeter is the use of integral or remote electronics. Integral electronics configurations are generally less expensive, while remote style electronics allows for easy access when the actual process line installation is in an inconvenient location, or in inhospitable environments.

For more information on any thermal mass flowmeter question or application, contact:

Arjay Automation
1178 E. Cliff Road
Burnsville, MN 55337-1577
Phone (800) 761-1749
Fax (612) 861-4292

Monday, February 1, 2016

Advanced Weighing and Load Sensors

KIS Load Cell
KIS Load Cell
The BLH Nobel KIS load cell delivers unmatched performance, is easy to install, and is extremely accurate, even when subjected to dynamic process forces and severe environmental conditions. Unlike many load cells, the KIS works as specified not just under laboratory conditions but in real-world applications as well. 

KIS Beam technology incorporates SR-4® foil strain gages connected as a full Wheatstone bridge that is temperature- compensated and calibrated to deliver accuracy and reliability. And because all KIS Beams are factory-calibrated, installation and setup are quick and easy with no need for on-site calibration (unless mechanical obstructions prevent a “freestanding” vessel).

This four-minute video highlights the features that distinguish KIS from other load cells.

To learn more, see the document below: