Honeywell Pressure Sensor Pressure Transducer Manufacturer honeywell.com/aero

Frequently Asked Questions

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Below you’ll find our responses to some of the most commonly asked questions regarding the Honeywell line of pressure sensors and transducers.

1. I am considering designing the PPT into my product but want to be sure it works in the application. Can I get a sample for breadboarding and evaluation?
Honeywell supplies consignment PPT units to potential purchasers through our local sales representatives for each territory. We ask that the units be returned undamaged or purchased after 4 weeks. Contact the factory for information on your local representative. Refer to key contacts section.

2. Do I have to use the PPT with a computer?
The PPT is configured at the factory to output analog pressure measurements from the time it is powered up. No computer interface is required if the factory default settings provide the data you require.

3. I want the PPT setup to operate in a special way which is not the same as the factory default settings (i.e., a higher update rate), but I still don’t want to bother with interfacing to a computer. Will the factory do special unit setups?
Yes, for a small fee we will set up the PPT in a special configuration at the factory.

4. I like the PPT family’s overall features, but for my application, I need something different from what your spec sheet lists. Do you offer customized configurations that will meet my needs?
Honeywell supplies a number of customized configurations of the PPT to customers who need nonstandard units. It is impossible to provide a precise answer to the question of cost because this depends on the nature of the modification and the quantity desired. We charge customers anywhere from $15 per unit for very simple pressure connector changes to a few hundred dollars per unit for special accuracies and more complicated hardware modifications. Please contact Customer Service to discuss your specific needs at 800-323-8295.

5. What is the technology of the sensing element in the PPT?
The PPT family uses a micromachined silicon chip with piezoresistive strain gauges. These are manufactured in our facility in Minnesota. Honeywell was one of the first companies to develop highly stable and repeatable pressure sensors using this technology, and we still consider our piezoresistive sensors to offer the best performance in the world today.

6. Is there a factory calibration service?
Honeywell will perform recalibrations for any IPT, PPT, HPA/B or PPTR/E transducers. Contact Customer Service.

7. Can I calibrate the PPT at my facility?
The PPT can be fully calibrated by the user for null and sensitivity using the RS232/RS485 communication options. Please refer to the User's Manual.

8. Do you supply Calibration Certificates?
Upon request, we will supply a Calibration Certificate with any unit. All of our calibration equipment is NIST-traceable

9. What about media compatibility?
This chip is exposed directly to the media for the basic PPT and is isolated by a secondary stainless steel diaphragm in the PPTR. We specify non-condensing, noncorrosive, non-combustible gases for the basic model, and materials compatible with SS316 for the PPTR.

10. When I turn on my differential unit, I get 2.5V on the analog output with zero applied pressure. Why?
PPT differential units provide true ± differential measurements, sometimes referred to as compound measurements. For PPT differential transducers, the 0-5V analog output swing is divided to swing from 2.5 to 0 volts when operating with "minus" pressure and 2.5 to 5.0 volts when operating with "plus" pressure.

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