Tavis Corp. - Industrial / Power Pressure Transmitters

The Nuclear Power Industry trusts Tavis for some of their critical air flow controls, with very low differential pressure transducers that have been seismically qualified. So do oil companies measuring high, down-hole pressures at hot temperatures. Conventional power companies also call on Tavis for their special sensing needs. When a process requires a rugged, bulletproof, install-it-and-forget-it measurement that the cheap sensors can’t handle, a Tavis transducer or transmitter is the right sensor investment. This is especially true for applications that must monitor very low delta pressures.

Power and Industry customers have looked to Tavis for custom sensors that offer:

Integral radiation shielding
Internal heater-controlled for added accuracy
Either 2- and 3-wire current loop (4-20 mA) outputs or 4-wire voltage outputs
110 VAC operation
Very Low Delta Pressure, some with high line and overpressure capability
Fully sealed environmental enclosures or all-welded designs
Seismic Qualification
Acoustic tolerance

Unit of Measure

Items	10291	10257	10347	10084
Pressure Range¹	N/A 0 - 0.1 inch H₂0D to 0 - 15 inch H₂0D	N/A 0 - 0.01 psid to 0 - 11.0 psid	N/A 0 - 0.17 psid to 0 - 1 psid	N/A 0 - 0.1 psid to 0 - 100 psid
Line Pressure	N/A 20 psia MAX	N/A 200% FS or 20 psi, whichever is greater	N/A 20 psig MAX	N/A
Proof Pressure	N/A 1 psid or 200% FS, whichever is greater	N/A 200% FS or 20 psi, whichever is greater	N/A 10 psid	N/A 200% FS or 20 psi, whichever is greater
Burst Pressure	N/A >>200% FS	N/A >>200% FS	N/A >>20 psid	N/A >>200% FS
Sensor Type	N/A Variable Reluctance
Weight	N/A 12 lbs Max	N/A 3.5 lbs Max	N/A 6.5 lbs Max	N/A 16 oz Max
Wetted Materials	N/A 410 SST 316 CRES Inconel 600/625	N/A 410 SST 17-4 PH SST Inconel 600/625	N/A 410 SST Brass 316 CRES	N/A 17-4 PH SST Inconel 600/625 Hy-Mu 80
Construction	N/A 2024 Aluminum Case with Polyester Epoxy Paint Internal Heater 110 VAC Input to Internal Terminal Block (Pigtail installed by User) Zero and Span Adjust Pots	N/A TIG Welded Zero and Span Adjust Pots 2.5 - inch O.D.	N/A 410 Gage Assy Brass Bulkhead Fittings Screen Port Filters Steel NEMA Case with Mounting Provisions Conduit Coupling	N/A TIG Welded Gage/Case Brazed Fittings Zero and Span Adjustment Pots
Fittings / Ports	N/A Female 3/8 - 18 NPT Fittings	N/A MS24385-4 Flared Tube Fittings	N/A Female 1/8 - 27 NPT Pressure Fittings Female ½ - 14 NPT Vent Fitting	N/A MS33656-4 Flared Tube Fittings
Input Voltage	N/A 24 - 32 VDC (Transducer) 110 VAC (Heater)	N/A 20 - 40 VDC	N/A 17 - 37 VDC	N/A 20 - 40 VDC
Output Signal	N/A 4 - 20 mA	N/A 0 - 5 VDC	N/A 4 - 20 mA	N/A 0.0 - 5.0 VDC
Power/Current	N/A 17 - 20 mA (Transducer) 50 W (Heater)	N/A 10 mA Max	N/A 4 - 20 mA	N/A 10 mA Max
Electrical Interface	N/A 110 VAC and 28 VDC Pigtail to Internal Terminal Strip (Pigtails installed by User)	N/A PT1H-10-6P or Equivalent	N/A 2-Wire Pigtail to Internal Terminal Strip (Pigtails installed by User)	N/A Bendix/MS3116 PT1Y-10-6P
Reverse Polarity Protection	N/A No
Insulation	N/A >100 MΩ @ 100 VDC	N/A >100 MΩ @ 100 VDC	N/A	N/A >100 MΩ @ 100 VDC
Output Impedance	N/A 0 - 500 Ω Load Impedance	N/A 100 Ω Max	N/A 0 - 1500 Ω Load Resistance	N/A 100 Ω Max
Compensated Temps	N/A 0 °F to +130 °F (Internal Heater Controlled)	N/A -65 °F to +165 °F (-65 °F to +200 °F Operating)	N/A 0 °F to +150 °F	N/A -65 °F to +165 °F
Vibration	N/A	N/A 20 g pk to 2000 Hz	N/A	N/A 35 g pk to 2000 Hz
Shock	N/A 100 grms 11 ms	N/A 20 g 11 ms Half Sine	N/A	N/A 100 g 11 ms Half Sine
App Media	N/A Air Gases	N/A Gases Liquids (above freezing)	N/A Clean Dry Air	N/A Gases Liquids (above freezing)
Static Error Band²	N/A	N/A ±0.5% FSO Max	N/A ±0.5% FSO Max	N/A ±0.5% FSO
Thermal Error²	N/A Heater Controlled	N/A ±2.0% FSO Max	N/A ±0.04% FS/°F Max	N/A ±2% FSO
Total Error Band (TEB)	N/A ±0.5% FSO Max	N/A	N/A	N/A
Frequency Response³	N/A	N/A Flat ±5% to 250 Hz	N/A 50 ms Max to 63% of Input Step	N/A Flat ±5% to 500 Hz
¹ The designs above are intended to convey just a few capabilities previously used in industrial settings for discussion purposes. Tavis specializes in custom configurations and capabilities for your specific application. Our engineers will be happy to assist you with your unique measurement requirements. ² Many error band definitions and limits are possible, and these actual error bands are too specific to delineate herein. A clear definition and understanding of any error band is critical, and many manufacturers’ published errors or accuracies can be very misleading. Please consult Tavis regarding your specific error band requirements. ³ Frequency Response given is for electronics only. Actual frequency response will depend on pressure range and media.