# Product Appearance, Specifications, and Model

### Appearance

![](https://content.gitbook.com/content/i4ECt41Kyy9211OWazj4/blobs/grvJCKhOT6iyR5321AYL/image)

### Exploded View

<figure><img src="https://3404778090-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fi4ECt41Kyy9211OWazj4%2Fuploads%2FkcSGlkZgIYFOM6hcZ7T0%2Fexplosure-view-en.png?alt=media&#x26;token=c512e2f4-771f-48fd-af1b-c66c8a1de1d8" alt=""><figcaption></figcaption></figure>

<figure><img src="https://3404778090-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fi4ECt41Kyy9211OWazj4%2Fuploads%2FKGxvqmTqVAsG3UtSqgw5%2FFU-LT-dimensions.png?alt=media&#x26;token=5cc1316b-29ee-4275-bfcc-12bd78c0b0c3" alt=""><figcaption></figcaption></figure>

### **Models & Dimensions**

<figure><img src="https://3404778090-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fi4ECt41Kyy9211OWazj4%2Fuploads%2F1aA6t0nUEIOpI16DgYHb%2FUnit-en.png?alt=media&#x26;token=0e31e48e-b2b1-4092-be20-8e997cb246d6" alt=""><figcaption></figcaption></figure>

| Model    | Nominal Pipe Size |   A |     B |     C |     D |    E |  F |
| -------- | ----------------: | --: | ----: | ----: | ----: | ---: | -: |
| FU-LT008 |              DN08 | 105 |  64.1 |  49.2 | 40.44 |   36 | 14 |
| FU-LT010 |              DN10 | 105 | 67.73 | 57.73 | 40.44 | 40.5 | 19 |
| FU-LT015 |              DN15 | 105 | 71.13 | 61.13 |  50.9 |   45 | 23 |
| FU-LT020 |              DN20 | 105 | 77.63 | 67.63 |  50.9 | 51.5 | 29 |
| FU-LT025 |              DN25 | 105 | 84.96 | 74.96 | 61.12 |   58 | 35 |

![](https://content.gitbook.com/content/i4ECt41Kyy9211OWazj4/blobs/jiKzRJ45YUCo8dMXCxaV/image)

### **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>                                                                                                             |

### 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% 至 100% of F.S. 時 ±3.0% OR </p><p>0% 至 10% of F.S. 時 ± 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><tr><td>Ingress Protection</td><td>IP66<mark style="color:red;">**</mark></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.

<mark style="color:red;">\*\*</mark> <mark style="color:red;"></mark><mark style="color:red;">**IP66 Rating**</mark>\
IP66 indicates complete protection against dust and resistance to high-pressure water jets.

### 3. **Electrical Specifications**

<table><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>

### 4. NPN Output

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

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

| Wiring          | 3-wire configuration                                  |
| --------------- | ----------------------------------------------------- |
| Power Supply    | Shared with the main unit; no separate power required |
| Output Range    | 2.4 \~ 21.6 mA                                        |
| Response Time   | <p>1 second</p><p>(matches display update rate)</p>   |
| Loop Resistance | 600 ohm @ 24V                                         |

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

| Baud Rate                 | 9600, 19200, 38400, 57600 |
| ------------------------- | ------------------------- |
| Wiring                    | 2-wire                    |
| Maximum Nodes per Network | 256                       |

## **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

![](https://content.gitbook.com/content/i4ECt41Kyy9211OWazj4/blobs/LvJG1DfBEmj4cJ8VHSP5/image)