What is the typical price range for furnace temperature sensors?

The average cost of a furnace temperature sensor is between 100 and 800 yuan. The sensor type (K-type, S-type, etc.), accuracy class, protective tube material, brand, and certification requirements all affect the final cost.

 

1. Reference Range for Prices

Type

Cost Range

An explanation

Typical thermocouple of the K type

100–300 RMB

High cost performance, temperature resistance of less than 1200°C, and widespread application in ordinary industrial furnaces

S-type thermocouple with high accuracy

500–800 RMB

Good stability and high-temperature precision control (e.g., long-term operation above 600°C)

with a protective ceramic tube +50–100 RMB

Improved mechanical strength and resistance to corrosion, appropriate for challenging conditions

Type of quick response

300–600 RMB

Response time <10 seconds, exposed chip or thin metal tube design

Practical recommendation: K-type thermocouples (580°C operating condition), which cost between 150 and 250 RMB per unit, are advised for H13 tempering furnaces. To satisfy criteria, regular calibration is adequate.

 

2. Important Elements Influencing Cost

Brand Difference: While international brands like Omega and Rosemount might cost more than 500 RMB, domestic brands like Hongrun and Zhongkong typically cost between 100 and 200 RMB.

Certification Requirements: Traceability certificates are needed for sensors used in CQI-9 or AMS 2750 systems, which raises the cost by 20% to 30%.

Bulk Purchase: Purchases of five or more items qualify for a 20% discount, which lowers the price per unit.

Installation Method: Costs are increased by 10% to 15% for special structures like threaded or flanged installations.

Advice: Cheap sensors are more likely to drift and age quickly, which raises the possibility of scrap and downtime.

 

3. How Can a High-Performance Sensor Be Selected? Give priority to Type K: Cost-controllable, stable performance at a tempering temperature of 580°C;

Verify the correctness of the calibration table by comparing measured millivolt values to standard values (e.g., roughly 14.2mV at 580°C);

Use anti-oxidation maintenance: To increase service life, clean terminals on a regular basis and apply anti-oxidation grease;

Buy from reputable sources: Compare prices on Alibaba 1688 and JD.com Industrial Products, and give preference to vendors that offer after-sales guaranties.

Safety precepts: "Reasonable selection, standardized installation, and regular maintenance" are necessary for accurate temperature measurement over an extended period of time.