Product Overview

The Ultrasonic Cold Heat Meter NKBJ2 Series is an intelligent energy metering device designed for accurate measurement of both heating and cooling energy in water-based heat exchange systems.

The product features a compact design, easy installation, accurate measurement, and stable long-term operation. It fully complies with CJ128-2007 and JJG225-2001 standards.

The meter can be used in both heating systems and air conditioning cooling systems. It mainly consists of:

• Paired temperature sensors for inlet and outlet water temperature measurement
• Ultrasonic flow sensor for measuring water volume
• Calculation unit for calculating and displaying heating or cooling energy consumption

Why Choose the Ultrasonic Cold Heat Meter NKBJ2 ?

The NKBJ2 Series combines ultrasonic flow measurement, high-precision PT1000 temperature sensing, and digital energy calculation into one compact instrument.

Compared with conventional mechanical heat meters, it provides:

• High-precision cold and heat energy measurement
• Stable ultrasonic measurement without moving mechanical parts
• Remote communication via M-BUS and RS485
• Automatic fault diagnosis and data storage
• Easy installation for HVAC and district heating applications

Typical Applications

The Ultrasonic Cold Heat Meter NKBJ2 is suitable for heat energy measurement in:

• District heating systems
• Central air conditioning systems
• Heating and cooling energy billing
• Combined heating and cooling supply systems
• Commercial and industrial HVAC systems

Product Features

High-Performance Ultrasonic Transducer

Imported piezoelectric ceramic transducers provide stable performance and excellent consistency, ensuring high measurement accuracy.

PT1000 Temperature Sensor

High-precision PT1000 platinum resistance sensors combined with precision measurement circuits provide accurate inlet and outlet temperature measurement.

Self-Diagnostic Function

During operation, the meter continuously monitors system status. If abnormal communication, low battery, or external damage is detected, the corresponding fault code is displayed and measurement data is automatically stored until normal operation resumes.

Remote Communication

Supports M-BUS and RS485 communication interfaces for remote data transmission and centralized management.

Easy Installation

The compact structure allows installation in multiple orientations and includes protection against dust, moisture, water ingress, unauthorized disassembly, and accidental damage.

Technical Specifications

Technical Specifications

Adapt to traffic range

This manual is only applicable to small-diameter pipe section ultrasonic heat and cold meters (≤ DN40).

Frequently Asked Questions

What is an ultrasonic cold heat meter?

An ultrasonic cold heat meter measures the heating or cooling energy transferred by water in HVAC and district energy systems using ultrasonic flow measurement and temperature sensors.

Where can the NKBJ2 Series be used?

It is suitable for district heating, central air conditioning, chilled water systems, commercial buildings, industrial HVAC systems, and energy billing applications.

Does the meter support remote communication?

Yes. The NKBJ2 Series supports M-BUS, RS485, infrared communication, and optional 4–20mA, RF, and GPRS communication methods.