With over 40 years experience of designing and building high integrity test and calibration systems, Chell's team of mechanical, electronic and software engineers are ready to design and build solutions for your R&D and production test and calibration applications.
Chell provides customers with a comprehensive calibration service covering all measurement instruments supplied by the company.
Chell Instruments offer a wide range of high quality and reliable mass flow meters, controllers and systems suitable for use in a wide range of applications and industries.
With over 40 years of experience in flow measurement and control, we are extremely well placed to assist in specifying and supplying instumentation for your application, from single instruments to bespoke automated systems. Chell's impressive calibration and repair facilities also allow us to offer comprehensive after sales support.
Chell Instruments are the UK distributor for the 'SAES Pure Gas' range of gas purification equipment. These offer incredible purification performance over a huge range of gases and flow rates through the use of absorber, adsorber, catalyst, heated getter and palladium membrane purification technologies.
We also supply a range of gas handling solutions, from full, bespoke gas panels to high performance needle valves and regulators.
Chell offer a wide range of equipment for the measurement and control of gas pressure. This could be a very high-end primary pressure standard, benchtop calibrator, portable calibrator or simply a single transducer. We can also provide bespoke, automated pressure measurement systems tailored to your exact process requirements.
Chell's impressive calibration and repair facilities also allow us to offer comprehensive after sales support.
Chell supply a range of temperature scanners to complement the pressure scanners
Chell Instruments offer a wide range of high quality and reliable vacuum measurement instrumentation for use in a huge variety of applications and industries.
With over 30 years of experience in vacuum measurement and control, we are extremely well placed to assist in specifying and supplying instrumentation for your application, from single instruments to bespoke automated systems.
Chell's impressive calibration and repair facilities also allow us to offer comprehensive after sales support.
High performance pressure control to 100 MPa (15,000 psi)
PPCH-G™, is a gas pressure controller/calibrator for gas pressure operation from 1 to 100 MPa (150 to 15,000 psi). As with the rest of the PPC family of pressure controllers, the emphasis is on high end performance, minimizing measurement uncertainty and maintaining precise control over a very wide pressure range… in a compact and rugged instrument.
Individually characterized, quartz reference pressure transducer (Q-RPT) modules increase precision and reduce measurement uncertainty. The AutoRange™ feature supports infinite ranging, automatically optimizing all aspects of operation for the exact desired range and taking pressure controller rangeability to a new level.
A unique pressure control system and gas booster accessory provide unlimited, on-demand pressure, very high control resolution and 10:1 pressure control turndown. Five different control modes are included for maximum versatility. Open architecture allows reference pressure measurement to be internal to or remote from the controller. If desired, the reference can be located at the test measurement point and independently removed for recalibration.
With all of this, PPCH-G opens new doors in automated high gas pressure calibration and test applications.
PPCH-G's outstanding pressure measurement specifications are made possible by the exclusive quartz reference pressure transducer (Q-RPT) modules.
Q-RPTs measure pressure by measuring the change in the natural oscillating frequency of a quartz crystal with pressure induced stress. To be qualified for use in a Q-RPT module, each transducer is individually evaluated and characterized using automated primary pressure standards. Only transducers exhibiting required levels of linearity, repeatability and stability are selected. A proprietary compensation model, derived from more than 15 years experience with thousands of quartz pressure transducers, is applied to optimize the metrological characteristics needed in a transfer standard.
PPCH-G can be delivered with a low cost utility sensor for applications in which the high precision and stability of a Q-RPT are not required.
Q-RPTs available for PPCH-G |
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Q-RPT Designation |
SI Version Maximum Range Absolute Gauge (MPa) |
US Version Maximum Range AbsoluteGauge (psi) |
A100M |
100 |
15 000 |
A70M |
70 |
10 000 |
A40M |
40 |
6 000 |
A20M |
20 |
3 000 |
A10M |
10 |
1 500 |
A7M |
7 |
1 000 |
There's a lot more to covering a wide range of test devices with a single gas pressure controller than "% of reading" measurement uncertainty.
In addition to the necessary measurement uncertainty, PPCH-G offers the full pressure control and feature adaptability that are needed for true rangeability in test and calibration applications. Infinite Ranging gives PPCH-G unprecedented versatility in adapting to a wide variety of devices to be tested. With the easy to use AutoRange function, a few simple key strokes or a single remote command string at the start of a test adapts every feature of the gas pressure controller to optimize it for a specific range.
A PPCH-G controller can be configured with up to four Q-RPTmodules. These can be internal or external to the PPCH-G controller. External Q-RPTs are in RPM4™ Reference Pressure Monitors. The RPM4's Q-RPTs then become part of the PPCH-G system and are managed by PPCH-G. External Q-RPTs must be disconnected or protected by valves when PPCH-G is used at pressure greater than the external Q-RPT range.
Examples of possible PPCH-G system configurations include: