The dual-infrared and one-ultraviolet flame detector is a new type of intelligent fire detection device. The detector utilizes high-performance dual-infrared sensing technology and ultraviolet detection technology, employing infrared sensors with different wavelengths and narrowband filtering, as well as ultraviolet flame sensors in the solar blind wavelength range. One of the three sensors, one infrared and one ultraviolet, is used to respond to the central wavelengths of flame information in different bands, while the other infrared sensor monitors other infrared radiation in the environment. By combining the flickering characteristics of flames and performing computational analysis through high-speed microprocessors and technical algorithms, the radiation spectrum with flame characteristics is confirmed as a fire alarm. The ultraviolet flame sensing device effectively suppresses interference from sunlight, enabling rapid response and accurate identification of flame signals. Additionally, this detector can be used for dual-infrared detection, single-ultraviolet detection, or both infrared and ultraviolet detection simultaneously.







SHUANGHONGYIZI Series
Dual-red and one-purple flame detector
Model: YHHZ
Key Features: Detection angle of 90° in infrared and 120° in ultraviolet, detection range up to 50 meters, explosion-proof design, optional stainless steel casing
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Product Overview
Application Scenarios
Product Features
Utilizing a high-speed, low-power consumption, high-performance 32bit high-precision data processing chip
Excellent radio frequency and electromagnetic interference resistance, with strong anti-interference capability
Sophisticated technical algorithms, high-speed response, high stability, and strong anti-false alarm capability
Detection angle 90° for infrared, 120° for ultraviolet
***Remote detection range up to 50m
Multi-level sensitivity settings to meet the needs of different occasions
Magnetic rod adjusts sensitivity, cover-free adjustment
The explosion-proof design is suitable for hazardous areas in various industrial settings
Technical Parameters
| Corresponding spectral range | 4.3μm、5.0μm、185nm~260nm |
| Detection Object | Flame |
| Sampling method | Real-time optical path sampling |
| Display mode | LEDdisplay |
| Status indication | GreenLEDflashing indicates normal operation(The number of flashes per3srepresents the sensitivity level), while a constant red light indicates an alarm |
| Operation mode | Magnetic wand sensitivity adjustment(4levels) |
| Output signal | 4~20mAcurrent;1channel fault relay contact,1channel alarm relay contact |
| Response time | ≤10s |
| Explosion-proof Mark | E xd II C T6 Gb/ Ex tD A21 |
| Protection level | IP66 |
| Operating voltage | DC24V ± 6V |
| Operating current | ≤30mA(DC24V) |
| Signal output | Relay passive contact,4~20mAoutput |
| ***Detection range | 50m0.3m*0.3mn-heptane flame |
| Detection angle | Infrared90 °, Ultraviolet120 ° |
| Weight | 1.5 ± 0.2kg |
| Installation method | Wall-mounted, ceiling-mounted, or pipe-clamped |
| Cable entry device interface | Two housing unitsNPT1/2connector |
| Housing | Copper-free cast aluminum, surface epoxy, resin baking paint treatment |
| Ambient temperature | -20℃~+60℃ |
| Relative humidity | ≤95%RH(no condensation) |



