IP-67 Mass Flow Meters (MFM) and Mass Flow Controllers (MFC) for All Sizes
Teledyne Hastings Instruments introduced the IP-67 Enclosure Version for our high accuracy Digital 300 Series of thermal mass flow meters and flow controllers in 2018. The IP, or Ingress Protection rating, describes the instrument’s ability to operate in challenging environments. The first number, 6, indicates that the flow instrument has total protection against dust (particulate). That’s the highest-level of dust protection achievable under the IP Code. The second number, 7, refers to protection from liquids.
The Digital 300 Series with optional IP-67 enclosure can withstand water immersion up to one (1) meter for thirty (30) minutes. While it may not be obvious to everyone, it offers the liquid protection of the one meter / thirty-minute immersion as well as all lesser liquid codes (from dripping water through powerful water jets).
Teledyne Introduces the HVGPR Pirani Vacuum Gauge for Compact, Cost-Effective System Integration
IES is pleased to highlight a new product release from our partner, Teledyne Hastings Instruments: the HVGPR Pirani Vacuum Gauge. Designed with OEMs and system integrators in mind, the HVG(PR) delivers reliable Pirani performance in a compact, competitively priced package optimized for modern vacuum systems.
Proven Pirani Technology with Integrated Electronics
The HVGPR is a thermal-based Pirani vacuum gauge with integrated electronics, using the same proven Pirani sensor found in the HVG-2020B. This precision-welded hot-wire sensor design has been in high-volume production since 2019, providing a strong
Most people are aware that the HVG-2020B wide range vacuum gauge has an optional display, but not everyone realizes that it's much more than just a display. It's actually a color touchscreen display and is packed with features. Let's take a look.
The HVG-2020B has 5 different display modes. Simply touch the icon on the lower left side to toggle through each one.
Thermal mass flow measurement instruments are typically separated into two main categories: Mass Flow Meters and Mass Flow Controllers. It’s estimated that over 90% of mass flow measurement instruments sold are mass flow controllers. So, it’s no surprise that most mass flow application conversations focus on mass flow controllers. Notwithstanding, there are still numerous applications for which mass flow meters are critical.
The following are common applications for mass flow meters (also known as thermal mass flow meters):
HVG-2020B: Choosing the Right Analog Output Signal for You
The HVG-2020B wide range, dual sensor vacuum gauge takes measurement to the next level. With a Piezo based sensor and a thermal based Pirani sensor, it accurately and confidently measures pressures across seven decades. The Piezo sensor is media isolated, gas composition independent, and periodically zeroed by the Pirani sensor. An ambient thermal sensor enables the instrument to adjust for temperature and therefore better accuracy.
The HVG-2020B offers multiple linear and logarithmic analog output signal options.
Why do you think Teledyne offers so many logarithmic output options?
The linear output may not always be useful. Remember: the HVG-2020B is a wide range gauge that covers seven (7) decades of vacuum. That’s a huge range to cover with a linear output signal!
For example, if you are using 0 – 10 VDC Linear Output:
Wide range vacuum gauges are measurement instruments that use a combination of technologies to cover from atmosphere to ultra-high vacuum. Examples of these technologies include a Pirani gauge, piezo sensors, or hot and cold cathodes. A wide range gauge would use 2-3 of these technologies that couldn’t be covered by just one of them alone.
As an example, Pirani vacuum gauges measure a low to medium range vacuum and can be paired with either a piezo gauge or an ionization gauge to measure either atmospheric pressure or ultra-high vacuum depending on the purpose of the wide range gauge. This helps provide a compact solution to your vacuum application by providing a single port pressure
The Importance of Specifying Gas Flow Range on a Mass Flow Controller
The Full Scale (FS) Range and Gas on a Mass Flow Controller (MFC) directly correlates to the transmitted output (analog or digital) of the device. In an analog device, the maximum output value (such as 5 vdc or 20 mA) will be equivalent to the FS value. The accuracy of most MFCs is a function of this FS Range.
A vacuum exists when there is negative pressure, or when there is system pressure that is less than atmospheric pressure. Manufacturing processes generate different levels of vacuum when operating at peak efficiency for a given vacuum application that are measured using a vacuum gauge. Absolute vacuum is the absence of all matter. Atmospheric pressure, also known as barometric pressure, is the pressure due to earth’s atmosphere. Atmospheric pressure is 760 Torr or 14.696 psia at sea level and changes with altitude. The vacuum pressure scale is book-ended by absolute vacuum pressure in the “ultra-high” vacuum range and atmospheric pressure at the “rough” vacuum range. It should be noted that absolute vacuum, or perfect vacuum, is never truly attained.
Most users know that vacuum is commonly measured using units of pressure. There are a few different systems of pressure measurement, and this blog will discuss those most used. In Armand Berman’s book,
Teledyne Hastings 4-channel Power Supply, Controller and Display - THCD-401
The THCD-401 provides both ±15 VDC or 24 VDC to power Teledyne Hastings' mass flow controllers, flow meters, vacuum gauges and pressure transducers. Feedback from connected devices is displayed on the bright, front panel LED display in 6-digit resolution, making open and closed channels easily identified at a glance. The THCD-401 can set a relay point for control of other processes and has a high accuracy of ± (0.02% of Reading + 0.01% of Full Scale). Custom configuring products to customer needs is Teledyne's specialty. Your THCD-401 can be factory configured to match the gas, range, units and the output of your instruments for out-of-box functionality.
THCD-401 Outperforms THCD-400
The THCD-401 was designed to be a highly flexible and multi-featured process display controller that can be panel mounted and capable of interfacing to an assortment of meters, controllers and gauges. A powerful
