# Product Appearance, Specifications, and Model

### Appearance

![](/files/3d56b84bd99d254a7ada26b7ff4f9bd757ac8c4f)

### Exploded View

<figure><img src="/files/zD1f20DO8VZcbsYrGNbK" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/kvi8c7Uc37npkgZL95Hr" alt=""><figcaption></figcaption></figure>

### **Models & Dimensions**

<figure><img src="/files/ferelsQCOc8JT07wsynO" alt=""><figcaption></figcaption></figure>

<table><thead><tr><th width="109.91143798828125">Model</th><th width="109.82818603515625">Nominal Pipe Size</th><th width="89.96875" align="center">A</th><th width="89.69268798828125" align="center">B</th><th width="89.7552490234375" align="center">C</th><th width="89.546875" align="center">D</th><th width="90.296875" align="center">E</th><th width="89.96875" align="center">F</th></tr></thead><tbody><tr><td>FU-LT008</td><td>DN08</td><td align="center">105</td><td align="center">64.1</td><td align="center">49.2</td><td align="center">40.44</td><td align="center">36</td><td align="center">14</td></tr><tr><td>FU-LT010</td><td>DN10</td><td align="center">105</td><td align="center">67.73</td><td align="center">57.73</td><td align="center">40.44</td><td align="center">40.5</td><td align="center">19</td></tr><tr><td>FU-LT015</td><td>DN15</td><td align="center">105</td><td align="center">71.13</td><td align="center">61.13</td><td align="center">50.9</td><td align="center">45</td><td align="center">23</td></tr><tr><td>FU-LT020</td><td>DN20</td><td align="center">105</td><td align="center">77.63</td><td align="center">67.63</td><td align="center">50.9</td><td align="center">51.5</td><td align="center">29</td></tr><tr><td>FU-LT025</td><td>DN25</td><td align="center">105</td><td align="center">84.96</td><td align="center">74.96</td><td align="center">61.12</td><td align="center">58</td><td align="center">35</td></tr></tbody></table>

![](/files/0b0c42540e58f0efca1a27151dd85e3126ee574a)

### **1. Mechanical Specifications**

| Installation Method                     | Clamp-On                                                                                                                                             |
| --------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------- |
| Maximum Pipe Wall Operating Temperature | Recommended ≤ 60 °C                                                                                                                                  |
| Recommended ≤ 60 °C                     | <p>-10~~60°C (14~~140°F)</p><p>(As fluid temperature increases, the allowable ambient temperature of the main unit must be reduced accordingly.)</p> |
| Power Supply Requirement                | DC 24V 200mA                                                                                                                                         |
| Response Time                           | <p>0.5 s (2 Hz)<br>1 s (1 Hz)</p>                                                                                                                    |
| Ingress Protection                      | IP66<mark style="color:red;">\*</mark>                                                                                                               |

<mark style="color:red;">\*</mark> <mark style="color:red;"></mark><mark style="color:red;">**IP66 Rating**</mark>\
IP66 stands for Ingress Protection 66. The IP rating is a standard that classifies the degree of protection provided by an electrical enclosure against the intrusion of foreign objects. The format is IPXX, where XX represents two digits: the first digit indicates the level of protection against contact and solid foreign objects (dust protection), and the second digit indicates the level of protection against water ingress. A higher number indicates a higher level of protection. For IP66: the first 6 means complete protection against dust ingress; the second 6 means protection against powerful water jets without harmful effect.

### 2. Measurement Specifications

<table data-header-hidden><thead><tr><th width="222.3212890625">Measurement Spec</th><th>Description</th></tr></thead><tbody><tr><td>Applicable Fluids</td><td>Liquids with no or minimal solids and air bubbles</td></tr><tr><td>Linearity</td><td>± 0.5 % FS (>0.3m/s)</td></tr><tr><td>Repeatability</td><td>± 0.4 %</td></tr><tr><td>Accuracy</td><td><p>10% to 100% of F.S.  (±3.0% OR)</p><p>0% to 10% of F.S. (± 0.3% FS)<mark style="color:red;">**</mark></p></td></tr><tr><td>Measurement Principle</td><td>Ultrasonic Time of Flight（Time of Flight, ToF）</td></tr><tr><td>Instantaneous Data</td><td>Flow rate, flow velocity</td></tr><tr><td>Totalized Data</td><td>Total flow (selectable: positive, negative, or net flow)</td></tr></tbody></table>

<mark style="color:red;">\*\*</mark> <mark style="color:red;"></mark><mark style="color:red;">**Accuracy Notice**</mark>\
Accuracy is calibrated under controlled conditions using clean water at ambient temperature with CNS UPVC pipes. Actual performance may vary due to fluid properties, pipe conditions, installation, and environmental factors.

### 3. **Electrical Specifications**

<table data-header-hidden><thead><tr><th valign="top"></th><th></th></tr></thead><tbody><tr><td valign="top">Power Supply</td><td><p>DC 24V, 200 mA</p><p>(Excluding 4–20 mA and RS485 current)</p></td></tr><tr><td valign="top">Reverse Polarity Protection</td><td>Yes</td></tr></tbody></table>

* #### NPN Output

  | Power Supply                | DC 24V 200mA                      |
  | --------------------------- | --------------------------------- |
  | Reverse Polarity Protection | Yes                               |
  | Wiring                      | NPN supported (PNP not supported) |

* #### **Analog Current Output (4–20 mA)**

  | Wiring                                       | 3-wire configuration                                                       |
  | -------------------------------------------- | -------------------------------------------------------------------------- |
  | Power Supply                                 | Device shares power with the main unit, no external power supply required. |
  | Max. Output Range (incl. error signal range) | 2.4 \~ 21.6 mA                                                             |
  | Resolution                                   | 10-bit (0–24 mA physical range)                                            |
  | Response Time                                | <p>≤0.5 to 1 s</p><p>(matches display update rate)</p>                     |
  | Loop Resistance                              | 650ohm @ 24VDC                                                             |

* #### **Digital Communication: Modbus RTU (RS-485)**

  | Baud Rate                 | 9600, 19200, 38400, 57600 |
  | ------------------------- | ------------------------- |
  | Wiring                    | 2-wire                    |
  | Maximum Nodes per Network | 32                        |

### **4. User Interface**

<table data-header-hidden><thead><tr><th width="150.9052734375"></th><th></th></tr></thead><tbody><tr><td>Languages</td><td>English, Traditional Chinese, Simplified Chinese</td></tr><tr><td>Units</td><td>Flow: L, ft³, Imp gal, US gal, m³<br>Time: Minute, Second, Hour, Day<br>Velocity: m/s, ft/s</td></tr><tr><td>Display</td><td>Single-screen<br>3-color backlit LCD, 3 lines × 16 characters (English)<br>Line 1: Current parameter and unit<br>Line 2: Measurement data<br>Line 3: Key definitions (see Human-Machine Interface section)</td></tr><tr><td>Digits</td><td>10 digits plus sign and decimal point</td></tr><tr><td>Operation Keys</td><td>4-touch keys</td></tr><tr><td>Wired Communication</td><td>Analog Output: Powered 4–20 mA<br>Modbus RTU: RS-485, 2-wire<br>NPN Output<br>(Includes 2 m signal cable, 6-core, non-isolated)</td></tr></tbody></table>

### Shipping Contents

Unless otherwise specified in the order, standard shipment includes:

* FU-LT Main Unit × 1 (with upper and lower clamps)
* Protective Cover for Main Unit × 1
* 2 m 6-pin Connection Cable × 1 (non-M12 connector)
* Quick Installation Guide × 1

![](/files/674acade4e574e7b2485774518678140a1f85db6)


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