Dwyer RHPLC-3N11 Temperature & Humidity Transmitter | Distributed by DLK

Posted on: 21/01/2026

The Dwyer RHPLC-3N11 Wall Mount Transmitter provides accurate humidity and temperature monitoring with 4-20mA output. Designed for HVAC and building automation systems with a durable, aesthetic housing. Officially distributed in Vietnam by DLK

Technical Review: Dwyer RHPLC-3N11 Wall Mount Temperature and Humidity Transmitter for HVAC Systems

In modern Building Automation Systems (BAS) and HVAC applications, precise environmental monitoring is critical for ensuring energy efficiency and occupant comfort. The Dwyer RHPLC-3N11 Wall Mount Temperature and Humidity Sensor stands out as a premier solution, combining high accuracy with an aesthetic design suitable for commercial spaces.

This product is officially imported and distributed by DLK TRADING SERVICE COMPANY LIMITED (DLK), a trusted partner providing advanced measurement and control solutions in Vietnam.

Overview of the Dwyer RHPLC-3N11

The Dwyer RHPLC-3N11 is a Wall Mount Transmitter designed to monitor two critical parameters simultaneously: Relative Humidity (RH) and Temperature. Engineered for economy without compromising performance, it features a stylish housing that blends seamlessly into professional environments such as offices, schools, and hospitals.

The core strength of this device lies in its ability to convert physical environmental data into standard analog signals, ensuring seamless integration with central controllers.

Operating Principle

To ensure reliability in continuous operation, the Dwyer RHPLC-3N11 utilizes advanced sensing technologies:

Humidity Sensing: It employs a Capacitive Polymer Sensor. As the ambient humidity changes, the dielectric constant of the polymer layer shifts, altering the capacitance. An integrated circuit converts this variation into a linear current signal. This technology offers rapid recovery from saturation and excellent long-term stability.
Temperature Sensing: The device uses a Solid State Band Gap sensor to monitor ambient temperature with high precision across a wide range.

Both measured values are converted into 4-20 mA Loop Powered output signals. This current loop transmission minimizes signal noise and voltage drop, making it ideal for long-distance transmission in industrial environments.

Practical Applications in Industry

With its wide measurement range and robust design, the Dwyer RHPLC-3N11 is widely applied across various sectors:

1. Healthcare and Hospital Environment Monitoring

In medical facilities, maintaining strict temperature and humidity levels is mandatory to prevent bacterial growth and mold. The Dwyer RHPLC-3N11 provides precise data, enabling BMS to regulate airflow effectively. This is a crucial component in solutions for air quality monitoring in hospitals, ensuring patient safety and compliance with stringent medical standards.

2. Commercial Buildings and Offices (Smart Building)

Balancing human comfort with energy savings is a major challenge in high-rise buildings. Dwyer sensors allow AHU/FCU systems to operate based on actual load demand rather than fixed schedules, preventing over-cooling or excessive humidity, thereby optimizing electricity costs.

3. Data Centers and Server Rooms

High heat loads and uncontrolled humidity can cause condensation on circuit boards or electrostatic discharge (ESD), damaging expensive server equipment. The Dwyer RHPLC-3N11 acts as a critical monitor, triggering Precision Air Conditioning (PAC) systems immediately when parameters exceed safe thresholds.

4. Warehousing and Logistics

For pharmaceutical or electronics storage, humidity is a primary cause of spoilage. Installing wall-mount sensors at critical points ensures continuous monitoring, guaranteeing that goods remain in optimal condition according to GSP/GMP regulations.

Why Engineers Choose the Dwyer RHPLC-3N11

Based on the technical datasheet, this model offers significant benefits to investors and M&E contractors:

Integrated Design: The sensor is protected within a durable plastic housing, minimizing damage from physical impact or tampering.
Cost-Effective Installation: The housing is designed to fit standard North American style electrical boxes, making installation quick and neat.
High Accuracy: With a humidity accuracy of ±3%, the device meets the requirements of most standard control applications.
Signal Stability: The 4-20 mA output is resistant to interference, suitable for connecting to PLCs, DDCs, or displays over long distances.

Technical Specifications Summary

For easy reference, below are the core specifications of the Dwyer RHPLC-3N11 Temperature and Humidity Sensor:

Specification	Detail
Manufacturer	Dwyer Instruments (USA)
Model	RHPLC-3N11
Humidity Range	0 to 100% RH
Temperature Range	-40 to 140°F (-40 to 60°C)
Accuracy (RH)	±3% (typically @ 20-80% RH)
Accuracy (Temp)	±0.9°F @ 72°F (±0.5°C @ 25°C)
Output Signal	4-20 mA Loop Powered (2 channels: RH & Temp)
Power Requirements	10 to 35 VDC
Sensor Type	Capacitive polymer (RH); Solid state band gap (Temp)
Housing Material	Polycarbonate
Mounting	Wall Mount (North American style)

Guide to Model Selection

Understanding the product code helps engineers select the correct replacement or new unit. The code RHPLC-3N11 is decoded as follows:

RHPLC: Wall Mount Humidity/Temperature Transmitter series.
3: 3% Accuracy.
N: North American housing style.
1: Humidity Output 4-20 mA.
1: Temperature Output 4-20 mA (This model includes the temperature transmitter).

Note: If your system requires 0-10V output or higher accuracy (2%), please consult the full selection table or contact our technical support.

Why Purchase Dwyer Equipment from DLK?

Choosing a reputable supplier is as important as selecting the right technical specifications. DLK TRADING SERVICE COMPANY LIMITED is proud to be the official distributor of Dwyer Instruments in Vietnam.

When purchasing the Dwyer RHPLC-3N11 from DLK, customers are guaranteed:

100% Genuine Products: Full CO/CQ documentation proving origin.
Expert Technical Support: Our team understands the products deeply and assists in selecting the optimal solution for specific BMS/HVAC projects.
Global Warranty: Warranty policies strictly follow Dwyer's standards.
Ready Stock: Quick response to the schedule requirements of contractors and large projects.