Process RTD

Process
Process meters are high precision instruments designed to measure, display, alarm, and control a wide range of process variables, such as 4-20 mA and 0-10 V analog inputs. Precision Digital’s process meters are available with relays, analog and open collector outputs, 24 V transmitter power supply, programmable function keys and advanced signal input conditioning, all of which greatly increase their functionality and utility. Many of these meters include sunlight-readable, dual-line LED displays, wide angle viewing, increased power efficiency, and digital serial communications. Process meters are available in NEMA 4X front digital panel meters as well as FM, CSA, ATEX, and IECEx approved explosion-proof and intrinsically safe meters for hazardous areas.

Process RTD

  • The Trident PD765 digital panel meter is one of the most versatile meters on the market and will satisfy a wide variety of process and temperature applications. Housed in an 1/8 DIN enclosure with a NEMA 4X front, the meter can be field programmed to accept process voltage (0-5 V, 1-5 V, etc.) and current (4-20 mA) inputs, 100 Ohm RTDs, and the four most common thermocouples. The display height on the standard Trident meter is 0.56" (14.2 mm) and on the Trident X2 the display height is an astounding 1.2" (30.5 mm). The intensity of the display can be adjusted to compensate for various lighting conditions, including direct sunlight. Programming and setup can be performed with the four front panel pushbuttons, free MeterView software, or using the copy function. Options for the PD765 include 2 relays, a 4-20 mA output, 24 V transmitter power supply, and Modbus® serial communications.

    PD765 X2
    Why you should buy:
    • Big Display
    • 1/8 DIN Panel Meter
    • Universal Inputs
    • 2 Relays & 4-20 mA Output
  • The SuperNova PD500 Series of PID Process & Temperature Controllers is a complete line of PID and on/off controllers. Available in popular 1/4, 1/8, and 1/16 DIN sizes, and with a shallow depth behind panel of only 2.5" (63 mm) it is easy to fit into almost any panel, product, or enclosure. Voltage, current (with external resistor), and direct temperature thermocouple and RTD inputs make it an excellent choice for any control application requiring easy to change, visible set points. This modern line of controllers shows the process variable (PV), set value (SV), and manipulated value (output level%, MV) on a striking reverse polarity LCD screen. Indicators for units (˚C, ˚F,%, or none) Auto and manual control modes can be easily changed by holding two buttons, and this is indicated on the front panel to make it easy for operators to know how to use this feature. Main control outputs can be 4-20 mA (SCR), voltage pulse (SSR), or relay outputs. A secondary relay control output is standard, which allow for one or two direction SV control (i.e., heating and cooling). Additional outputs may include two SPST alarm relays and a 4-20 mA retransmit output. Other options include a secondary 4-20 mA input to remotely control the set point, and RS-485 for Modbus communication. A mini-USB port may be used for a direct PC connection to run the SuperNova software for monitoring, programming, and data logging. This USB port is located on the rear behind the panel for PD510 1/16 DIN models, and on the front behind a rubber tab on PD520 and PD530 1/8 and 1/4 DIN models.
    Why you should buy:
    • Auto-Tuning PID Controller
    • Temperature and Process Inputs
    • Heating & Cooling
  • The ProtEX-MAX PD8-765 explosion-proof, large-display, process and temperature meter offers all the functionality of the Trident X2 as a CSA, ATEX, and IECEx certified explosion-proof product. It is available in an aluminum or stainless steel enclosure and will operate over a wide temperature range of -55 to 65°C (-67 to 149°F). PD8-765's huge 1.2" (30.5 mm) sunlight readable display that is visible from over 30 feet away. This explosion-proof indicator can be field programmed to accept process voltage (0-5 V, 1-5 V, etc.) and current (4-20 mA) inputs, 100 Ohm RTDs, and the four most common thermocouples. The intensity of the display can be adjusted to compensate for various lighting conditions, including direct sunlight. The meter can be programmed and operated without opening the housing by using the built-in CapTouch through-glass buttons or the RS-485 serial communication port with free Modbus protocol. Options for the PD8-765 process and temperature indicator include 2 relays, a 4-20 mA output, and a 24 V transmitter power supply.

    Why you should buy:
  • The MINIMUX® II PD138 is a microprocessor-based, eight-channel analog input scanner/multiplexer and annunciator that provides low-cost automatic switching for multi-point display and alarm systems. It can automatically switch up to eight inputs to another device such as a digital panel meter, controller, or PLC. Signal switching is done via reed relays making the PD138 ideal for switching thermocouples, RTDs, control loops, and AC/DC signals. They feature rugged NEMA 4X/IP65 fronts and a wide operating temperature range. They can be programmed for many common ISA alarm sequences including first out indication and they provide alarm signaling through front panel LEDs and a build in 85 dB horn. Custom printed message labels can be included with your order at no additional charge.

    Why you should buy:
    • Scans Temperature and Analog Inputs
    • Channel Alarms
    • NEMA 4X/IP65 Front
  • The PDS178 Watchdog Temperature Scanning & Alarming System brings together a popular combination of Precision Digital products: the Trident meter, the Minimux II scanner, and the PDA2821 NEMA 4X enclosure. The scanner automatically switches between up to eight (8) input signals (4-20 ma, ±10 V, TC, or RTD) and sends them to the Trident meter for display. Signal switching is done via DPST reed relays. The Watchdog can be used in a variety of temperature and process monitoring applications. A very common application for this system is to monitor bearing temperatures. The Trident meter included with this system is available with standard 0.56" (14.2 mm) high LED digits or large 1.2" (30.5 mm) high LEDs.