This photoelectric smoke detector detects smoke by a couple of infrared diodes. The principle of detecting is granule in the smoke can reflect infrared light. Infrared diodes are placed in the special chamber. The chamber can shield exteral light, but doesn't affect the smoke into it. While there is no smoke, the diode can receive very weak infrared light. When the smoke entering the chamber, diode can receive more and more light, and the detector can give out alarm signal when the smoke attains the certain density. In order to reduce the interference and lower power consumption, the emitting circuit adopts the pulse signal. The photoelectric smoke detector in accordance with the networking approach is divied into 2-wire and 4-wire photoelectric smoke alarm.
Technical Data:
| Category | 2 wires/4wires |
| Operation Voltage | DC9V-35V |
| Currency | 50uA |
| Alarm indication | Red LED |
| Temperature range | -10 - 50ºC |
| Humidity | ≤95% no condensation |
| Alarm output | Remote LED |
Features:
1. Strong adaptability for circumstance
2. SMT Design, High stability
3. 9-35V DC Wide voltage operating range
4. Low standby currency
5. Power supply non-polarized input
6. Twin LED for 360° visual
7. Flashing LED power indicator
8. Remote LED indicator output
9. Metal shield, anti-electromagnetic interference
FAQ:
1. Why do you choose our company?
We are trading company, we can help our clients to find any kinds of products in China. We are always looking for good manufacturer with good quality and good price for our clients.
2. How can you guanranty your quality?
EVery time we will inspect our factories first. This inspect will include the persons, the present products, their scale etc. If everything is ok, we will start to cooperate. During cooperation, we will go to the factories to test the products to guanranty the products has good quality. If it doesn't meet our requirement, the goods will be refused.
3. Do you have price advantage?
For us, the quality is our first consideration. And the second consideration is the price. We couldn't say we have the lower price, because of quality issue. We need to say we have the best price.
4. How long do you do the export business?
For our company, it starts in 2012. And for our sales persons, they have 8-10years experience to do the international business. They understand each step for the export and do good service for each of our clients. Intoduction:
This photoelectric smoke detector detects smoke by a couple of infrared diodes. The principle of detecting is granule in the smoke can reflect infrared light. Infrared diodes are placed in the special chamber. The chamber can shield exteral light, but doesn't affect the smoke into it. While there is no smoke, the diode can receive very weak infrared light. When the smoke entering the chamber, diode can receive more and more light, and the detector can give out alarm signal when the smoke attains the certain density. In order to reduce the interference and lower power consumption, the emitting circuit adopts the pulse signal. The photoelectric smoke detector in accordance with the networking approach is divied into 2-wire and 4-wire photoelectric smoke alarm.
Technical Data:
| Category | 2 wires/4wires |
| Operation Voltage | DC9V-35V |
| Currency | 50uA |
| Alarm indication | Red LED |
| Temperature range | -10 - 50ºC |
| Humidity | ≤95% no condensation |
| Alarm output | Remote LED |
Features:
1. Strong adaptability for circumstance
2. SMT Design, High stability
3. 9-35V DC Wide voltage operating range
4. Low standby currency
5. Power supply non-polarized input
6. Twin LED for 360° visual
7. Flashing LED power indicator
8. Remote LED indicator output
9. Metal shield, anti-electromagnetic interference
FAQ:
1. Why do you choose our company?
We are trading company, we can help our clients to find any kinds of products in China. We are always looking for good manufacturer with good quality and good price for our clients.
2. How can you guanranty your quality?
EVery time we will inspect our factories first. This inspect will include the persons, the present products, their scale etc. If everything is ok, we will start to cooperate. During cooperation, we will go to the factories to test the products to guanranty the products has good quality. If it doesn't meet our requirement, the goods will be refused.
3. Do you have price advantage?
For us, the quality is our first consideration. And the second consideration is the price. We couldn't say we have the lower price, because of quality issue. We need to say we have the best price.
4. How long do you do the export business?
For our company, it starts in 2012. And for our sales persons, they have 8-10years experience to do the international business. They understand each step for the export and do good service for each of our clients.
First : PILOT HOLE DRILLING
The pilot hole is drilled from the entry point to the exit point following a previously designed profile and alignment. The Drilling Tools and rig equipment selected for each job is largely determined based on the results of the geotechnical investigation and the size of the crossing (length and diameter). During the pilot hole drilling, a directional guidance system is used to navigate the pilot hole along its pre-designed profile. Marine Support including vessel and dive crew management is essential on Shore Crossing Projects.
Second : HOLE ENLARGEMENT
In small diameter crossings the pipeline may be directly installed in the pilot hole. However in most cases pilot hole enlarging, known as [pre-reaming," will be necessary. Pre-reaming is required to provide a bore diameter large enough so that the pipeline can be installed in the drilled crossing. Based on the final desired diameter and soil conditions this process may include one or more stages.
Third : PULL BACK
Once the drilled hole has been enlarged to the required diameter and cleaned adequately, the pipeline is installed. When applicable, the pipeline is pre-assembled in a single string and placed on rollers prior to pullback. For pullback, a reamer is connected to the Drill Pipe. Behind the reamer a swivel is connected allowing the drill pipe to rotate the reamer without allowing the transfer of torque to the product pipe. The drill pipe is then pulled back towards the entry point until the pipeline is fully installed.
HDD Hole Opener
HDD Hole Opener,Well Drilling HDD Hole Opener,Rock Well HDD Hole Opener,HDD Hole Opener For Horizontal Drilling
Hejian Deris Petroleum Drilling Equipment Co.,Ltd. , http://www.welldrillingbit.com