Instrument and Meter Manufacturer
PRODUCT FEATURES
Description
LFH21 Temperature and Humidity Controller is a product specially designed for indoor temperature and humidity detection andcontrol.It has the advantages of compact size,simple installation and convenient operation.It has special design for lightningsurge,electrostatic discharge,group pulse,voltage resistance,etc.,strong ant-interference ability,and has an alarm function.Itis widely used in computer rooms,buildings,warehousing and other places where temperature and humidity measurement andcontrol are required.
Specification
| 1.RELATIVE HUMIDITY | ||
| Sensor | Digital | |
| Range | 0%~100%RH | |
| Output | RS485/Modbus,0~10VDC | |
| Accuracy | ±3%@20℃&20~80%RH | |
| Response time | ≤10s(20℃,slow flow air) | |
2.TEMPERATURE | ||
| Sensor | Digital or passive thermal resistor,details in below selection table | |
| Range | 0~50℃,-20~60℃ ETC | |
| Output | RS485/Modbus,0~10VDC, | |
| Thermal resistance | Details in selection table and thermal resistance graduation table | |
| Accuracy | Digital type:±0.3℃@20℃;See table below Passive thermal resistance:typical±0.2~0.4℃@25℃ | |
| Power supply | RS485:15~35VDC/24VAC±20% | Voltage:15~35VDC/24VAC±20% |
| Note:when RS485 and voltage type uses AC power supply,an isolation transformer is required | ||
| Output load | ≥10 KΩ(voltage output) | |
| Display accuracy | 0.1℃,0.1%RH | |
| Display and buttons | LCD display and keys with unit display and backlight | |
| Alarm function | 1×BUZZER,1×LED | |
| Relay | 2×SPST,3A/30VDC,3A/250VAC | |
| Shellmaterial | PC shell | |
| Operating environment | -20~60℃,5%-95%RH(Non-condensing) | |
| Protection Grade | IP30 | |
Product Selection
| Code and description | Remark | |||||||||||||||
| LFH21 | Indoor type temperature and humidity controller | Model | ||||||||||||||
| 3 | ±3%RH(±0.3℃) | Accuracy | ||||||||||||||
| V10 | 0~10VDC(3-wire) | Humidity output | ||||||||||||||
| RS | RS485/Modbus | |||||||||||||||
| V10 | 0~10VDC(3-wire) | 2 | NTC20K,±0.4℃@25℃ | Temperature output | ||||||||||||
| RS | RS485/Modbus | 3 | NTC10K,±0.4℃@25℃ | |||||||||||||
| 0 | PT1000,±0.2℃@0℃ | |||||||||||||||
| 1 | PT100,±0.2℃@0℃ | |||||||||||||||
| 0 | No | Temperature range | ||||||||||||||
| 1 | 0~50℃ | |||||||||||||||
| 2 | -20~60℃ | |||||||||||||||
| 8 | Customized range | |||||||||||||||
| 1 | Setting button,backlight LCD display with unit | Display and setting button | ||||||||||||||
| 1 | Alarm only | Alarm ans relay | ||||||||||||||
| 2 | Relay only | |||||||||||||||
| 3 | Alarm ans relay | |||||||||||||||
| LFH21 3 V10 V10 2 1 3 | Model Example | |||||||||||||||
FAQs
What types of products can we offer?
We provide pressure measuring instruments, level measuring instruments, temperature and humidity measuring instruments, pressure switches, miniature water pumps, flow meters, and other products.
What logistics do we ship through?
Sample=7 days,10~100 pcs=15 day,buck order is negotiable.
Can it be customized as per our requirements?
Yes, customized is accept, please contact us for specific requirements.
Can I get samples?
Yes, you can contact our engineers to request samples.
What services are included in the after-sales service
Please carefully inspect the following products ordered from LEFOO when you receive them.If you do not meet your reservation requirements or find that the products have surface quality problems,please take photos and contact the sales engineer who served you.Once this kind of product is signed,within 7 days,the LEFOO product will maintain the original quality and function when it was sold,and the product itself,accessories,and trademark logos are complete,and you can return the product without reason.Within 30 days,accept the return application due to quality reasons.
- For more information on refund timing and amounts(including partial refunds and restocking fees),please contact the sales engineer who served you.·
- If you have returned an item to LEFOO by mistake or included something not intended for LEFOO in a return,please contact the sales engineer who served you.
- To ensure a good return experience for you,you must adhere to LEFOO’s Return and Refund policies.Thank you for your cooperation.
