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電磁明渠流量計

電磁明渠流量計采用流速面积法，不需修建量水建筑物，通过测量过水断面面积与断面流速来求得流量，广泛应用于明渠引水、水利工程、城市供水、污水处理、农田灌溉等矩形、梯形明渠及涵洞的流量测量。

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産品簡介 / Introduction

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儀表結構與原理

電磁明渠流量計包括流速传感器、液位计、明渠转换器以及辅助安装結構。根据现场需求，可选配太阳能供电系统或者明渠流量无线监控系统。

電磁明渠流量計通过测流速及水位，经过嵌入式处理器计算出流量。流速测量根据法拉第电磁感应定律，通过流速传感器测得明渠的实时瞬时流速。水位测量可采用超聲波液位計、压力式液位计、浮球液位计等液位计测得，以超聲波液位計为例，采用超声波时差法，通过超聲波液位計测得明渠的实时水位高度。電磁明渠流量計转换器根据预先设定的渠道尺寸以及测得的流速、水位数据，采用流量修正算法，计算得出明渠的实时瞬时流量，并将流量信息显示在液晶屏上，同时可将流量信息通过通讯接口传送给二次仪表。

産品特點

1 、標准渠道不需要改造可直接安裝，安裝施工費用低

2 、與傳統堰槽流量計相比，可測更寬的渠道

3 、沒有水頭損失，不受下遊壅水影響

4 、測量精度高，不受流體密度、粘度、溫度、壓力和電導率變化的影響

5 、采用液晶背光式顯示，可在直射陽光或者夜晚讀取流量數據

6 、帶多種輸出接口，包括脈沖輸出、頻率輸出、485接口等

7 、具有數據保存功能，可在長期停電的情況下保存設置參數和流量值

8 、兼容性強，可選配太陽能供電系統或者明渠流量無線監控系統

9 、可測量天然的河、溪流量

10 、可測量汙水排放渠道或管道(下水道)流量

11 、盲區可調節，屏蔽探頭附近幹擾信號

12 、測量範圍大，流量測量不受支流面回水的影響

未标题111-2 未标题5464-2

技術參數

結構	分體式
測量範圍	流速0.05m/s ～10m/s
渠道水位範圍	≤59m
渠道寬度	≤59m
流速測量精度	±0.5%
水位測量精度	±0.2%FS
電磁明渠流量計整体精度	±5%
環境溫度	-20℃～ +50℃
液晶顯示	瞬時流量、累積流量、流速、流量百分比、液位百分比、液位高度、報警信息等。
輸出	脉冲輸出、频率輸出、 485 接口等
轉換器供電	+24V DC
功耗	≤10W
傳感器防護等級	IP68
明渠轉換器防護等級	IP65
被測水道類型	管道，渠道，天然的溪流、河流

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: 插入式電磁流量計

★测量精确度不受液体密度、粘度、温度、压力和电导率变化的影响；★高可靠性的外插安装方式，传感器的安装、维护无需拆卸测量管，因此较适合于无法停水的现场使用，而且可以在老管道上现场开口安装；★結構简单，電磁流量計测量管可不用内衬，可靠性高；公称通径范围宽，适用于DN100-DN3000之间的所有口径管道；★一体化接地电极，实现仪表良好接地；传感器采用新的加工工艺、固态封装、耐振动、防渗透、寿命长，使仪表具有良好的测量精确度和稳定性。

: QTLD分體式電磁流量計

★測量管內無可動部件，便于維護管理；無阻流部件，因此無壓力損失。★被測液體最低電導率≥5μs/cm，配合各種襯裏材料，可適用于測量各種酸、堿、鹽溶液及泥漿、礦漿、紙漿等介質的流量。★流量的測量不受流體的密度、粘度、溫度、壓力和電導率變化的影響，傳感器感應電壓信號與平均流速呈線性關系，測量精度高。★合理選用襯裏及電極材料，可實現良好的耐腐蝕性和耐磨性。★低頻矩形波激磁，不受工頻及現場各種雜散幹擾的影響，工作穩定可靠。★不受流體方向影響，正反向均可准確計量。★量程比1：120(0.1m/s～12m/s)，滿量程流速範圍寬。★漢字液晶背光顯示，可在線修改參數，操作簡單方便。★具有空管測量、報警功能，並能適應不同的流體介質。★掉電時間記錄功能，自動記錄儀表系統電源間斷時間，補算漏計流量。★小時總量記錄功能，以小時爲單位記錄流量總量，適用于分時計量制。

: 電磁明渠流量計

電磁明渠流量計采用流速面积法，不需修建量水建筑物，通过测量过水断面面积与断面流速来求得流量，广泛应用于明渠引水、水利工程、城市供水、污水处理、农田灌溉等矩形、梯形明渠及涵洞的流量测量。

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