Digital Stainless Steel Pressure Transmitter with Integrated Temperature Measurement

Most processes are governed by pressure and temperature together, yet plants traditionally install two separate instruments, two process taps and two sets of wiring. The QWY-307 digital stainless steel pressure transmitter integrates temperature input directly, so one instrument, one installation and one signal chain deliver both parameters to the control system.

Why Do You Need Pressure and Temperature in One Instrument?

In food processing, HVAC, hydraulics, pressure alone tells only half the story. Temperature affects product quality, process safety and equipment health: a hot pump discharge, a chilled food line or a hydraulic system running warm all demand temperature visibility alongside pressure. Installing separate pressure and temperature instruments doubles the cost of process penetrations, fittings, wiring and maintenance, and each extra penetration is an extra leak point. An integrated transmitter solves this by measuring pressure with its built-in sensor and accepting a temperature input from an RTD, thermocouple or millivolt source, combining both values in one digital instrument. Engineers get complete process visibility with half the installation cost and half the leak risk.

Working Principle: Dual Measurement in a Single Digital Instrument

The QWY-307 measures pressure through its stainless steel sensing element and simultaneously conditions a temperature input from an external RTD, thermocouple or millivolt source through its integrated signal conditioning electronics. Both values are processed digitally and made available for monitoring and control, while the integrated pressure switch function provides set-point alarms based on the pressure value. The instrument operates over a working temperature range of -30 to +85 °C, and its 316L stainless steel construction with silicone oil or glyceride-and-water fill fluid options suits both industrial and hygienic applications. This dual-measurement design gives operators pressure and temperature data from a single process point, simplifying installation and maintenance.

Structural Advantages of the QWY-307

• Integrated temperature input: RTD, TC or mV conditioning in the same instrument.
• 316L stainless steel construction: corrosion-resistant for industrial and food service.
• Digital processing: stable, repeatable pressure and temperature values.
• Integrated pressure switch: local alarm or control without extra hardware.
• Wide working temperature -30 to +85 °C: cold and hot environments covered.
• Fill fluid options: silicone oil or food-grade glyceride-and-water.
• M20×1.5 and 1/2" NPT connections: standard industrial threads.
• Compact single-instrument design: one tap, one installation, one signal chain.

Pain Point Analysis: 4 Challenging Working Conditions

Application Cases

Product Advantages

• Integrated temperature input (RTD / TC / mV) with pressure
• 316L stainless steel construction for durability
• Digital processing for stable, repeatable readings
• Integrated pressure switch for alarms and control
• Working temperature range -30 to +85 °C
• Food-grade glyceride-and-water fill fluid option
• M20×1.5 and 1/2" NPT process connections
• One installation point for two process variables
• Compact design saves space and reduces leak points
• OEM/ODM customization and manufacturer support

Technical Parameters

SEO FAQ

Q1: What does integrated temperature mean for a pressure transmitter?

Integrated temperature means the QWY-307 can accept and condition a temperature signal from an external sensor, such as an RTD, thermocouple or millivolt source, in addition to measuring pressure with its built-in sensing element. The instrument processes both values digitally, so a single transmitter provides both process variables to the control system. This is different from a pressure-only transmitter, which measures just pressure and leaves temperature to a separate instrument. By combining the two, the QWY-307 reduces the number of instruments, process penetrations and wiring runs needed to monitor a process point completely.

Q2: Why should I measure pressure and temperature together?

Many processes are governed by pressure and temperature together, and monitoring only one leaves blind spots. In pasteurization, both values determine product safety; in HVAC, both are needed for energy calculations; in hydraulics, overheating and overpressure both damage equipment; in pharmaceutical processing, both must be documented for batch records. Measuring them together at the same process point also gives a more complete picture of the process condition, because the two values are captured at the same location and time. Integrating both in one instrument delivers this complete visibility with lower cost and complexity than separate instruments.

Q3: What temperature sensors can be connected?

The QWY-307 accepts RTD, thermocouple and millivolt inputs, covering the most common temperature sensor types used in industry. RTDs (resistance temperature detectors) offer high accuracy and stability and are the standard choice for most process applications. Thermocouples cover very high temperatures and are used in demanding thermal applications. Millivolt inputs allow connection of other mV-output sensing elements. The instrument conditions the selected input and provides the temperature value alongside the pressure measurement. When ordering, specify your sensor type and range so the input is configured correctly at the factory.

Q4: What is the working temperature range of the instrument itself?

The QWY-307 operates over a working temperature range of -30 °C to +85 °C. This covers cold outdoor installations, chilled processing areas and hot machine environments, giving the instrument broad application flexibility. The electronics and sensing elements are designed to maintain stable performance across this range, so readings remain dependable in winter and summer alike. Note that this is the ambient working temperature of the instrument; the process temperature is measured separately by the connected temperature sensor, which should be selected to match the actual process conditions. For extreme ambient environments, consult our engineers for guidance.

Q5: Can the instrument be used with food and pharmaceutical products?

Yes. The QWY-307 can be configured with a glyceride-and-water fill fluid, which is suitable for food and pharmaceutical service because it does not contaminate the product in the event of a diaphragm rupture, unlike silicone oil. The 316L stainless steel wetted parts provide corrosion resistance and are compatible with CIP and SIP cleaning regimes when combined with appropriate hygienic connections. This makes the instrument suitable for food processing, beverage, dairy and pharmaceutical applications where material compatibility and product safety are critical. Please specify your hygienic requirements when ordering so the correct configuration and documentation are supplied.

Q6: How does the pressure switch function work?

The integrated pressure switch function allows the QWY-307 to generate an electrical output when the pressure crosses a configured set point, providing local alarm or control capability without a separate pressure switch. Set points can be configured within the operating range, including the Max Off options of 5.0 to 16.0 bar shown in the specifications. For example, a high-pressure alarm can shut down a pump or alert operators before the pressure becomes dangerous. Combining the switch function with pressure and temperature measurement makes the QWY-307 a compact, multifunction instrument for protection and monitoring applications.

Q7: What process connections are available?

The QWY-307 is available with M20×1.5 male and 1/2" NPT male process connections, two of the most widely used standards in industrial instrumentation. The M20×1.5 metric thread is common in European and Asian equipment, while 1/2" NPT is the standard tapered pipe thread used across North America and much of the world. Both options allow direct mounting on pipe tees, manifolds or vessel nozzles with standard fittings. If your installation requires a different connection, please contact us, as additional options can be discussed for specific projects.

Q8: How is the instrument installed?

Install the QWY-307 at the process point using the appropriate process connection, with an isolation valve where the process must remain online during maintenance. Mount the instrument so the pressure port is protected from sediment buildup and, in gas service, so condensate drains away. Connect the temperature sensor to the instrument's temperature input terminals according to the wiring diagram, observing correct polarity for TC inputs and proper lead configuration for RTDs. Wire the pressure output and switch output to the control system, and verify both the pressure and temperature readings against reference instruments during commissioning.

Q9: What maintenance is required?

The QWY-307 is designed for low-maintenance service. Periodically check the process connection for leaks, verify the temperature sensor wiring and probe condition, and confirm that the pressure and temperature readings agree with reference measurements. The zero point of the pressure measurement can be checked by isolating and venting the instrument, and the switch set points can be verified by applying known pressures. For quality-critical applications, perform an annual calibration check of both measurements. With its robust 316L construction and digital design, the instrument provides long, dependable service with simple routine checks.

Q10: What support and customization do you provide?

As the manufacturer, we provide direct technical support for the QWY-307, including sensor selection, wiring guidance and troubleshooting. OEM and ODM services are available, such as custom pressure ranges, custom temperature input configuration, switch set points, connections, labeling and packaging, with a monthly supply capacity of 100 pieces and delivery within 5-8 working days. Every unit is factory-calibrated and tested before shipment, and calibration certificates are available on request. Contact us with your process requirements for a recommendation and quotation.

Why Choose Our Integrated Temperature Pressure Transmitter?

The QWY-307 is the efficient choice for processes that live on two variables: it measures pressure, conditions your RTD, TC or mV temperature signal, and provides switch alarms, all in one 316L instrument with one process connection. You save installation cost, reduce leak points and gain complete process visibility. As the manufacturer, you get factory configuration, food-grade options and responsive support. When your process needs both pressure and temperature, choose the instrument that measures both.