RenKe RS-WD 86×86 mm Single-Temperature Transmitter with LCD Display (Analog Output)

Overview

The RenKe RS-WD is a DIN-standard 86×86 mm single-point temperature transmitter engineered for industrial and facility monitoring applications where reliable, real-time ambient or process temperature feedback is required. Designed around a high-stability analog signal conditioning architecture, the device integrates a precision temperature sensing element—sourced from a U.S.-based semiconductor manufacturer—into a compact, panel-mountable housing with built-in LCD display. Unlike basic digital thermometers, the RS-WD functions as a true 2-wire or 3-wire analog transducer: it converts resistance or voltage signals from its internal or externally mounted probe into a standardized, noise-immune analog output (4–20 mA or 0–5/0–10 V DC), compatible with PLCs, SCADA systems, DCS controllers, and data loggers. Its wide operating voltage range (10–30 V DC), extended probe temperature capability (−40 to +120 °C, configurable), and robust enclosure make it suitable for deployment in electrically noisy or thermally demanding environments—including telecom cabinets, power distribution panels, HVAC control zones, warehouse management systems, and light industrial automation loops.

Key Features

• Standard 86×86 mm faceplate with 60 mm² cutout—designed for seamless integration into standard junction boxes and control panels.
• Integrated backlit LCD display provides local, real-time temperature readout without requiring external instrumentation.
• Modular probe configuration: supports four factory-configurable probe types—cylindrical stainless steel, magnetic-mount, flat-profile stainless steel, and 1/4″ NPT-threaded—enabling application-specific thermal coupling.
• High-reliability analog output circuitry optimized for long-term stability; typical temperature drift ≤0.1 °C/year under continuous operation.
• Wide input voltage tolerance (10–30 V DC) ensures compatibility with common industrial power rails; 0–10 V output variant requires nominal 24 V DC supply for full-scale linearity.
• Supports both 3-wire and 4-wire connection topologies, minimizing lead resistance error in current-loop configurations and enabling flexible field wiring practices.
• IP65-rated front panel (when properly installed) provides protection against dust ingress and low-pressure water jets—suitable for indoor industrial enclosures.

Sample Compatibility & Compliance

The RS-WD is intended for non-invasive or semi-invasive temperature measurement of air, surface, or enclosed-space environments. Its probe variants accommodate diverse mounting constraints: magnetic probes enable rapid attachment to metal cabinets; threaded probes allow direct insertion into ductwork or equipment housings; flat-profile probes minimize spatial intrusion in tight control panels. While not certified for hazardous (ATEX/IECEx) or sanitary (3-A/DIN 1185) applications, the device meets general-purpose electromagnetic compatibility (EMC) requirements per GB/T 17626 (China national equivalent to IEC 61000-4 series) and conforms to RoHS Directive 2011/65/EU for restricted substances. Calibration traceability follows ISO/IEC 17025 principles when accompanied by optional factory calibration report (NIST-traceable reference standards used).

Software & Data Management

As a stand-alone analog transmitter, the RS-WD operates without embedded firmware, drivers, or software dependencies. It delivers passive, protocol-agnostic output signals that interface directly with any analog-input-capable acquisition system. For users integrating into regulated environments (e.g., pharmaceutical warehouse monitoring per WHO TRS 961 or FDA 21 CFR Part 11), the device supports audit-ready documentation workflows when paired with compliant data loggers featuring electronic signatures, time-stamped event logs, and secure configuration history. Optional calibration certificates include uncertainty budgets and environmental test conditions, facilitating GLP/GMP validation protocols.

Applications

• Continuous temperature surveillance in telecom base station cabinets and fiber distribution frames.
• Thermal safety monitoring inside low-voltage switchgear, UPS enclosures, and battery backup compartments.
• Environmental compliance logging in cold-chain storage facilities (e.g., pharmaceutical warehouses, food logistics centers).
• Process setpoint verification in HVAC zone controllers and building automation systems (BAS).
• Preventive maintenance support for industrial motors, transformers, and power electronics via hotspot detection using external probes.
• Education and laboratory infrastructure where cost-effective, repeatable analog temperature feedback is required for control loop prototyping.

FAQ

What is the default output signal type, and can it be changed after purchase?
The RS-WD is configured at the factory for one analog output type (4–20 mA, 0–5 V, or 0–10 V). Output type cannot be reconfigured in-field; ordering must specify the required variant (e.g., RS-WD-I20 for 4–20 mA).
Is the LCD display visible under low-light conditions?
Yes—the integrated monochrome LCD features LED backlighting activated automatically during active measurement or manual button press.
Can the probe be replaced or extended in the field?
Probes are permanently sealed and calibrated as an integrated sensor-transmitter assembly. Replacement requires factory recalibration; custom-length probe cables (up to 10 m) are available upon order specification.
Does the device support HART or digital communication protocols?
No—the RS-WD is strictly analog-output only. For smart transmitter functionality (e.g., HART, Modbus RTU), consider RenKe’s RS-WS series digital transmitters.
What is the recommended calibration interval for GxP-regulated use?
Per ISO/IEC 17025 and industry best practice, annual calibration is advised; more frequent intervals may be justified based on risk assessment, usage intensity, and criticality of measured parameter.