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Existing designs provide capabilities such as:
Existing designs provide capabilities such as:
Existing designs provide capabilities such as:
Previous hardware for missions to Mars, Jupiter, Venus and the Moon have featured one or more of the following:
Tavis Venturi flowmeters are used in applications with characteristics such as:
Tavis land and sea vehicle applications involve such features and capabilities as:
High reliability liquid level measurements with Tavis transducers/transmitters have featured:
Power and Industry customers have looked to Tavis for custom sensors that offer:
Pressure Transducers for Manned & Unmanned Launch Vehicles
(4) Whether monitoring feed line, tank ullage or atmospheric ascent pressures, Tavis transducers continue to provide reliable telemetry for the most critical payload launches. Measurements on the violent first stage, as well as upper stage propulsion pressures, are within reach using our rugged Variable Reluctance (VR) sensors. When success is the only acceptable outcome, consider a customized Tavis VR transducer for your launch requirements.Existing designs provide capabilities such as:
- Low change in pressure measurements with very high line pressure
- Severe rocket motor vibration environment
- High proof and reverse proof pressures
- Custom frequency response characteristics
- Extreme cold media interface
- Wet – Wet capability without the need to coat or protect diaphragm (non-contact, metallic diaphragm without any electrical connections)
Pressure Transducers for Aircraft / UAV
(4) Tavis sensors are currently monitoring cockpit instrumentation cooling air pressures on fighter jets, measuring bleed air pressures on military aircraft, indicating torque pressures on commercial turboprops, keeping UAVs aloft with fuel system controls, and more. Landing gear braking system pressures and even airliner waste tank level sensors are also part of the Tavis aircraft repertoire.Existing designs provide capabilities such as:
- Contamination tolerance and self-draining features to handle ingestion of debris and moisture.
- Comparing 2 differential pressures to each other in a single instrument – e.g. upstream and downstream flow rates
- Bi-directional overpressures:
- Proof pressures as high as 333 times full scale
- Reverse proof pressures as high as 133 times full scale
- Connector or pigtail configurations
- Voltage or current loop output
- Wet – Wet capability without the need to coat or protect diaphragm (non-contact, metallic diaphragm without any electrical connections)
Pressure Transducers for Satellite Propulsion
(4) Inconel 718 and 304L CRES materials are used in our satellite transducers because of their compatibility with caustic propulsion media such as MMH, NOX, MON-3, etc. Most satellite transducer designs manufactured by Tavis utilize a ¼-inch tube stub for orbital tube welding into the spacecraft manifold tubing. The tube stubs are typically seamless 304L or 321; however, some designs incorporate a Titanium-to-304L transition tube for use with Titanium spacecraft plumbing.Existing designs provide capabilities such as:
- High pyro shock tolerance for nearby valves and separation nuts
- Inherent secondary barrier for burst pressure containment
- High proof and burst pressure capability
- Connector or pigtail configurations
- EMI filtering and immunity
- Compact size
- Low power consumption for long orbit life requirements
- Space-grade parts; radiation-hardened components and shielding
- No mounting feet option, or one-piece case and mounting feet configurations
- Soldering procedures based on NASA-STD-8739.3
Pressure Transducers for Interplanetary Exploration
(4) Tavis satellite transducers have provided propulsion measurements for journeys to orbit other planets, while other Tavis instruments have actually landed on planetary surfaces or measured pressures as the spacecraft plummets through other solar system atmospheres.Previous hardware for missions to Mars, Jupiter, Venus and the Moon have featured one or more of the following:
- Very low barometric pressure measurements with high proof
- Severe thermal environments
- Tether cable for thermal separation between gage and electronics
- Low power consumption
- Long-term stability over thermal environments
- Ice, sand, dust immunity
- High-cycle power on-off
- Spores bake-out
- Zero Outgassing
Pressure Transducers for Manned Spacecraft
(4) In addition to our customers making ΔP measurements across an orifice with our differential transducers, Tavis makes very accurate flow sensors with integral venturi tubes. In fact, the Space Station is chock full of Tavis flowmeters for environmental control and life support systems. Our Variable Reluctance technique and construction allow for very high line pressures even with low flow rates. Some of our more customized flowmeters have dual flow range capability.Tavis Venturi flowmeters are used in applications with characteristics such as:
- Custom venturi designs for specific flow requirements
- Dual gage low/high flow rates
- High line pressure
- Output signal linear with either pressure or flow
- No rotating/moving parts
- Continuous analog output; flow is not sampled or digitized
- Weld-mount, flange-mount, fitting-mount interface with system plumbing
- 4 - 20 mA and 0/1-5 VDC outputs
Pressure Transducers for Submarine / Military Vehicles
(4) Sea water, fresh water, air, fuel and oil pressures are monitored by Tavis transducers every day, and on some of the most sophisticated land and sea-based vehicles in the world. Our customized acceptance testing assures that whether at a cold depth of 100 fathoms or a dusty speed of 100 mph, all your pressure measurements are reliable and accurate.Tavis land and sea vehicle applications involve such features and capabilities as:
- High corrosion resistance
- Small dynamic pressure signal detection amid very high static pressures
- User-defined, tuned frequency response characteristics
- Contamination tolerance and particle traps
- Specialized shielding and filtering for operation near strong EMI sources
- 2- and 3-wire current loop outputs and 4-wire voltage outputs
Pressure Transmitters for Submersible / Liquid Storage
(4) Are you tasked with monitoring the liquid level in an open water reservoir, river, or in a closed or vented tanking system? Tavis transducers have been providing liquid level measurements for anything from wine fermentation tanks to remote lakes. Flush diaphragm models have been designed to bolt directly onto tank walls. Ported transducers are easily plumbed into manifolds and processing vats. Even submersible styles have been developed to reside directly in the liquid, whether an open water body or a down-hole well. Vent lines can be used to provide atmospheric or ullage pressure reference for very accurate liquid level data. Tavis Technical Bulletin #103 may be of interest to those looking for additional information on tank gauging and liquid level measurement.High reliability liquid level measurements with Tavis transducers/transmitters have featured:
- High corrosion resistance stainless steels and Inconels
- Either 2- and 3-wire current loop (4-20 mA) outputs or 4-wire voltage outputs
- Submersible configurations with vented reference ports
- Liquid intrusion into a reference port will not damage the all-metallic welded gage
- Underwater electrical/data cables
- Small diameter, down-hole well capability
- Self-clearing diaphragm ports for clog-free operation
- Custom mounting provisions
Industrial / Power Pressure Transmitters
(4) 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
