? ☆ given the security meter № determine security meter offer № given the security meter prices ★ 
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 Given security meter ☆: 
 Our R & D fixed meter, RF card as the media, all kinds of information in the form of an induction entered into Dingan meter control CPU, the amount of water Dingan meter purchased by the user automatically open the valve the water supply, when the remaining amount of water to less than 5m3 (including 5m3) but have not yet exhausted, and every integer (for example, the remaining water to 4m3, 3m3, 2m3, 1m3), Honour meter will automatically power within its valve closed, the user simply purchase water into the water meter Dingan write Card sensing area to sense the electric valve Dingan meter reopen (Dingan meter remaining water is less than 5m3 to exhaustion during this time, be safe water meter with five times without water way to remind users to purchase water). If to the exhaustion of the remaining water within the given security meter, users do not purchase the water and write fixed safety meter, the electric valve will be closed until the user to purchase water and write inside until the fixed security meter. In order to achieve the first to buy the water, the purpose of water ". 
 ? Dingan meter exhausted in the remaining water and electric valve is closed, for some reason (such as electric valve internal leakage) flow through the fixed security meter, set the security meter will continue to be measured, their number is counted as a negative value. When the user re-purchase of water and write Dingan meter Dingan meter will first be deducted the negative values ??(ie, the first overdevelopment of the water), water newly written enough deductible super negative values ??of the water, is scheduled to security meter electric valve does not open but remain closed until the water remaining in the meter of Dingan positive so far. When the Company suffered such as magnetic and other external attacks, within one minute inside the electric valve shut down. At this point, the user can be induced to purchase water card to (sensing area), you can own the electric valve to open and Dingan meter work properly. However, if such an attack accumulated more than 10 times more users to purchase water card will no longer be able to open its electric valve (in case the user man-made attack), high a check card (water management The department only holds) to the electric valve is opened, the same time attack record clear (after the user configuration of the water cards but also because of the attack and then open the 10th). Enabling it to achieve the ability to lift their own Dingan meter attack, but also to limit the behavior so that it can not indefinitely Dingan meter man-made attack. Produced by our company, multi-presented two of the company's trademark and warnings tamper shrink film than other fixed security meter each, installation, its pre-set into the receiver on Dingan water meter installed and after passing the leak, tamper shrink film Dingan meter take over the nut, then use the hair dryer (1600w high heat hair dryer) at the tamper shrink film at the blowing or use hot water above 90 ℃ at the anti demolition poured shrink film, shrink film, shrink to take over the shape of the nut to tight coupling. To split the table must be tamper destruction of heat shrinkable film, thus preventing the artificially split the table for the purpose of stealing water. In addition to the above characteristics, the product, the following characteristics: (a) non-contact (RF card) information carriers, electronic wear, fast transmission of information, confidentiality and anti-attack performance, high reliability; (b) with LCD display the total quantities of water purchased, and the remaining water and all kinds of information; when the remaining water is zero or alarm value, automatically close the valve without water; d the entire system is usually in the off state, static power consumption is zero; (e) electric control valve patented electric valve to completely overcome the electromagnetic valve interference and shutdown lax defects; f unique anti-theft of water, tamper table, anti-reversal device; g measurement display using electronic and LCD Dual Display so as not to affect the of Dingan meter accuracy test and verification; h, the overall closed-shell design, anti-attack, waterproof, moisture, fumes, anti-knocking; i read and write cards of the sale of water management unit may be used alone, but also and computer networking. The company produces technical parameters are as follows: Working power supply: two 3.6V lithium battery, the working life of 8-10 years; (b) usually work current: 0A; c instantaneous operating current :1-5MA; d. RF card Life time:> 100 000; (e) Working pressure: 1MPa below normal work; (f) the operating temperature range (temperature) :0.3-40 ° C; g. the whole life of 8-10 years. This product complies with the standards of GB GB/T778-1996 of cold water given meter and line marked CJ/T133-2006 "Dingan meter. 
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 ? A the Huiyi license the Dingan meter profile security meter developed in recent years for ordinary Dingan meter in a small flow (less than 8L / H) measured at defects. Common set security meter because of the movement of the rotating parts and count the gear inertia, so in the measurement process, if the water flow is small to a certain degree will not be able to promote the movement of the impeller and counter gear, thus the micro flow can not be measured, people can be less than the starting flow of this drip meter Dingan not measured to obtain the water tube online, so that the water supply enterprises suffered losses. To solve this problem, Beijing Hui Yi has developed a pressure differential integral anti-drip Dingan meter, it simply does not change Dingan meter movement in advance, will drop out of the water in drip first accumulate, save to a certain amount of a sudden promote Dingan meter impeller rotation to achieve the purpose of drip measurement 
 ?, Product uses and characteristics: This series of fixed security meter for the total amount of the high sensitivity to flows through the tube drinking water, its main features are as follows: 1, the smaller the initial flow rate, the initial flow rate of less than 0.5L / h ; is 16 times more than ordinary Dingan meter; adaptability to water quality: the anti-drip institutions and outlet of the drainage channel distance of 4mm, by particles below 4mm, so that the anti-drip institutions will not be in the water impurities clogged or stuck; 3, anti-slip performance: ordinary movement is the flow rate, not idling, soft diaphragm can offset part of the water hammer pressure, coupled with anti-drip closure of the institution, so the anti-creep performance far far superior to the jet and C-level anti-drip set security meter; 4, in the 0.5L / h to 14L / h under the micro-flow state for intermittent measurement (like displacement fixed security meter), and micro-flow range measurement error is small; 5, convened by the Ministry of Construction and the China Water Association, China's authoritative experts on the products and technologies to identify, its technology has reached the leading domestic level. Can guarantee the normal work for more than 10 years of anti-drip institutions. Conditions of use: the work of the water temperature does not exceed 40 ℃, working pressure is not greater than 1Mpa. Four, show error: less than the minimum flow (Qmin) of the trace does not count; from including minimum flow (Qmin) to but excluding the boundaries of flow (Qt) of low district: ± 5%; from including the boundaries of flow (the Qt) to include overload In the upper zone of the flow (Qmax): ± 2%. Pressure loss: △ ≤ 0.1Mpa 
 ? Water Meter Co., Ltd. Beijing Hui Yi Dingan all the members sincerely welcome you to Beijing Hui Yi Dingan meter factory guidance inspection 
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