? ☆ Tianjin pre-paid water meters № Tianjin № Tianjin, pre-paid water meters offer pre-paid water meter price ★ 
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 Tianjin pre-paid water meters ☆: 
 Our R & D production in Tianjin, the pre-paid water meters, RF card as a form of media, a variety of information using sensing input to Tianjin, pre-paid water meters control CPU, Tianjin prepaid meter to automatically open the valve the amount of water purchased by the user water supply, when the surplus 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), Tianjin pre-paid water meters will automatically inside the electric valve is closed Users only need to purchase water used to put Tianjin pre-paid meter card write "sensing area to sense can be Tianjin pre-paid water meters within the electric valve re-open (ie, Tianjin pre-paid water meters within the remaining water less than 5m3 to the exhaustion of this period, Tianjin, pre-paid water meters to 5 times without water way to remind users to purchase water). If to Tianjin, pre-paid water meter within the remaining water exhausted, users do not purchase the water and write Tianjin prepaid water meter, electric valve will be closed until the user to purchase water and write Tianjin pre-paid water meters within. In order to achieve the first to buy the water, the purpose of water ". 
 ? When Tianjin pre-paid water meters in the remaining water exhausted and electric valve is closed, for some reason (such as electric valve internal leakage, etc.) the prepaid water meter water flowing through Tianjin, Tianjin, pre-paid water meters will continue to be measured, the count of the number of negative values ??when the user to re-purchase of water and write pre-paid water meters in Tianjin, Tianjin, pre-paid water meters will first deduct the negative values ??(ie, the first also super water), water newly written enough deductible super negative values ??of the water, Tianjin pre-paid water meters within the electric valve does not open and continue to be closed until the Tianjin pre-paid water meters within the remaining water is positive. 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 purchase water card to (sensing area) induction, you can own the electric valve to open and pre-paid water meters in Tianjin. 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 self-lifting Tianjin pre-paid water meters have been attacks, but also to limit the behavior so that it can not indefinitely Tianjin prepaid meter man-made attack. Produced by our company than other Tianjin pre-paid water meters for each multi-presented two of the company's trademark and warnings tamper shrink film, installation, pre-set into to take over Tianjin prepaid water meter installed and leak testing after passing tamper shrink film in Tianjin, pre-paid water meters take over the nut, and then use a hair dryer (1600w high heat hair dryer) at the shrink film at the blow tamper or above 90 ℃ hot water alignment tamper Pour of shrink film, shrink film shrink while the nut take over the shape of the hoop tight. 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 carrier, a table card wear, fast transmission of information, confidentiality and anti-attack performance, high reliability; b. using the LCD shows the total quantities of water purchased, the remaining water and all kinds of information; c 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, the static power consumption is zero; e-. electric control valve is a 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 a table multi-card and dual LCD display, which does not affect the Tianjin pre-paid water meter accuracy test and calibration; h. overall closed-shell design, anti-attack, waterproof, moisture, anti-smoke, anti-knocking; i its sale of water to read and write The card management unit may be used alone, but also with 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 GB/T778-1996 GB cold water Tianjin pre-paid water meters and line marked CJ/T133-2006 Tianjin pre-paid water meters standard. 
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 ? A, Hui Yi brand Tianjin prepaid meter Introduction to Tianjin pre-paid water meters in recent years, pre-paid water meters for ordinary Tianjin 8L / H) measured in the small flow rate (less than defects developed. Ordinary the Tianjin pre-paid water meters due to the movement of the rotating parts and count the gear inertia, so in the measurement process if the water flow to a certain extent will not be able to promote the movement of the impeller and counter gear, thus the micro flow can not be measured at can be used less than the starting flow of this drip Tianjin pre-paid water meter is not metering water to obtain a multi-card 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 Tianjin pre-paid water meters, simply does not change Tianjin pre-paid water meter movement in advance, the drop out of the water in drip first accumulate when save to a certain amount of a sudden promote Tianjin prepaid water meter impeller rotation to achieve the purpose of drip measurement 
 ? Second, the product uses and characteristics: This series of Tianjin, pre-paid water meters for high sensitivity to flows through a multi-card the total amount of drinking water of its main features are as follows: 1, the smaller the initial flow rate, the initial flow rate less than 0.5L / h; is ordinary Tianjin pre-paid water meters, 16 times or more; 2, adaptability to water quality: due to the drainage channel between the anti-drip institutions and outlet distance of 4mm, so by particles below 4mm, so anti drip body will not be blocked or stuck by impurities in the water; 3, anti-slip performance: general movement is a multi-flow rate, not idling, soft diaphragm can offset part of the water hammer pressure, coupled with anti-drip closure of institutions , so its anti-creep performance is far superior to the jet and the C-class anti-drip Tianjin pre-paid water meters; 4, 0.5L / h to 14L / h under the micro-flow state for the intermittent measurement (like displacement Tianjin prepaid Fei meter), and micro-flow range measurement error is small; 5, of the authority of experts convened by the Ministry of Construction and Water Association to identify the products and technologies, and its technology has reached domestic leading 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 
 ? Beijing Hui Yi, Tianjin, all members of the pre-paid water meter Co., Ltd. sincerely welcome you to, Huiyi Tianjin, Beijing pre-paid water meter factory guidance inspected! 
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