# Submersible pressure sensor — LF-1

> Submersible pressure sensor for level measurement in vessels, storage systems, rivers, lakes, deep wells, and groundwater monitoring, suitable for contaminated and aggressive media.

- Catalog code: lf_1
- Model: LF-1
- Category: Level measurement › Submersible pressure sensors
- Product page: https://avigan.com.ua/wika/en/products/lf_1
- Price: 610.57 EUR
- Supplier: AVIGAN (TOV VIKA Prylad), official WIKA partner in Ukraine

## Overview

Permanently reliable Extensive test cycles not only guarantee a permanent resistance and long service life in all commonly used oils and fuels, including ...

## Applications

- Level measurement in vessel and storage systems
- Overfilling and no-load operation monitoring
- Level measurement in rivers and lakes
- Deep well and groundwater monitoring
- Battery-operated level measuring systems

## Special features

- Suitable for measurements in contaminated and aggressive media
- An optimised discharge behaviour and a large pressure port prevent the instrument from clogging and ensure a minimum maintenance effort
- Can be used in explosion-protected areas
- Developed for wireless applications

## Specifications

| Parameter | Value |
|---|---|
| model | LF-1 |
| product family | LF |
| short description | Submersible pressure sensor for level measurement in vessels, storage systems, rivers, lakes, deep wells, and groundwater monitoring, suitable for contaminated and aggressive media. |
| subcategory | submersible pressure sensor |
| certifications | CE; EAC; RoHS; REACH; ATEX; IECEx; CSA; FM |
| explosion protection | Zone 0 gas [II 1G Ex ia IIC T4/T5/T6 Ga]; Zone 1 gas [II 2G Ex ia IIC T4/T5/T6 Gb]; Ex ia IIC T4/T5/T6 Ga; Ex ia IIC T4/T5/T6 Gb; Class I, division 1, groups A, B, C, D; Class I, zone 0; A/Ex ia IIC; T6 ... T4 Ga; Class I, zone 1; A/Ex ia IIC; T6 ... T4 Gb; Class I, zone 2; A/Ex ic IIC; T6 ... T4 Gc; Class I, zone 0, AEx ia IIC, T6 ... T4 Ga; Class I, zone 1, AEx ia IIC, T6 ... T4 Gb; Class I, zone 2, AEx ic IIC, T6 ... T4 Gc; Class I, zone 0; A/Ex ia IIC;T6 ...T4 Ga; Class I, zone 1; A/Ex ia IIC;T6 ...T4 Gb; Class I, zone 2; A/Ex ic IIC;T6 ...T4 Gc; AEx ia IIC, T6 ...T4 Ga; AEx ia IIC, T6 ...T4 Gb; AEx ic IIC, T6 ...T4 Gc; Class I, division 1, groups A,B,C,D; Class I, zone 0; A/Ex ia IIC; T6...T4Ga; Class I, zone 1; A/Ex ia IIC; T6...T4Gb; Class I, zone 2; A/Ex ic IIC; T6...T4Gc |
| ambient temp | -40 … 80 °C |
| ip rating | IP68 |
| weight kg | 0.3 |
| languages in datasheet | en; de |
| technology | hydrostatic |
| level ranges m | 0 … 1.6 mH2O; 0 … 2.5 mH2O; 0 … 4 mH2O; 0 … 6 mH2O; 0 … 10 mH2O; 0 … 16 mH2O; 0 … 25 mH2O; 0 … 40 mH2O; 0 … 60 mH2O; 0 … 0.1 mH2O; 0 … 1 mH2O; 0 … 0.16 mH2O; 0 … 0.25 mH2O; 0 … 0.4 mH2O; 0 … 0.6 mH2O |
| output signal | 4 ... 20 mA (2-wire); 4 ... 20 mA + HART (2-wire); DC 0.1 ... 2.5 V (3-wire, low power); 2 x 4 ... 20 mA (2 x 2-wire, galvanically isolated); 2 x DC 0.1 ... 2.5 V (3-wire, low power); 4 ... 20 mA(2-wire); 4 ...20mA+HART® (2-wire); DC 0.1 ...2.5V (3-wire, low power); 2 x 4 ... 20 mA(2 x 2-wire, galvanically isolated); 2 x DC 0.1 ...2.5V (3-wire, low power); 4...20mA (2-wire); 4...20mA+HART® (2-wire); DC 0.1...2.5V (3-wire, low power); 2x4...20mA (2x2-wire, galvanically isolated); 2xDC 0.1...2.5V (3-wire, low power) |
| accuracy | ≤ ±0.5 % of span (option) |
| wetted parts material | 316L; 318LN; Hastelloy C276; PUR; FEP; FKM; PVDF |
| process temp | -40 … 80 °C |
| process pressure max bar | 6 |
| power supply | DC 8 ... 36 V (varies by output and Ex approval) |
| electrical connection | Cable outlet with or without conduit, PUR or FEP cable |

## Datasheet tables

### Gauge pressure

| bar | 0 ... 0.1 | 0 ... 0.16 | 0 ... 0.25 | 0 ... 0.4 | 0 ... 0.6 | 0 ... 1 | 0 ... 1.6 |
|---|---|---|---|---|---|---|---|
|  | 0 ... 2.5 | 0 ... 4 | 0 ... 6 |  |  |  |  |
| inWC | 0 ... 50 | 0 ... 100 | 0 ... 150 | 0 ... 250 |  |  |  |
| psi | 0 ... 5 | 0 ... 10 | 0 ... 15 | 0 ... 25 | 0 ... 50 | 0 ... 100 |  |
| mH 2 O | 0 ... 1 | 0 ... 1.6 | 0 ... 2.5 | 0 ... 4 | 0 ... 6 | 0 ... 10 | 0 ... 16 |
|  | 0 ... 25 | 0 ... 40 | 0 ... 60 |  |  |  |  |
| Absolute pressure |  |  |  |  |  |  |  |
| bar | 0 ... 1.6 | 0 ... 2.5 | 0 ... 4 | 0 ... 6 |  |  |  |
| psi | 0 ... 25 | 0 ... 50 | 0 ... 100 |  |  |  |  |

### Measuring ranges

| Option 1 | -10 ...+50 °C [14 ... 122 °F] |
|---|---|
| Option 2 | -40 ...+80 °C [-40 ...+176 °F] |

### Without temperature measurement

| Standard | 4 ... 20 mA(2-wire) |
|---|---|
| Option 1 | 4 ...20mA+HART ® (2-wire) |
| Option 2 | DC 0.1 ...2.5V (3-wire, low power) 1) |

### With temperature measurement

| Standard | 2 x 4 ... 20 mA(2 x 2-wire, galvanically isolated) |
|---|---|
| Option 1 | 2 x DC 0.1 ...2.5V (3-wire, low power) 1) |

| Output signal | Standard | With Ex approval |
|---|---|---|
| 4 ... 20 mA(2-wire) | DC 8 ...36V | DC 9 ...30V |
| 4 ...20mA+HART ® (2-wire) | DC 12 ...36V | DC 12 ...30V |
| DC 0.1 ...2.5V (3-wire, low power) | DC 3.6 ...36V | - |
| 2 x 4 ... 20 mA(2 x 2-wire, galvanically isolated) | DC 8 ...36V | DC 9 ...30V |
| 2 x DC 0.1 ...2.5V (3-wire, low power) | DC 3.6 ...36V | - |

| 1 | Accuracy 1) | Non-linearity (per IEC 61298-2) BFSL |
|---|---|---|
| Standard | ≤ ±1 %of span | ≤ ±0.5 %of span |
| Option | ≤ ±0.5 %of span | ≤ ±0.25 %of span |

### Accuracy after turndown 5:1 via HART ®

| Standard | ≤ ±1.25 %of scaled span |
|---|---|
| Option | ≤ ±0.75 %of scaled span |

### Permissible temperature ranges

| Medium | Standard | -10 ...+50 °C [14 ... 122 °F] |
|---|---|---|
|  | Option | -40 ...+80 °C [-40 ...+176 °F] |
| Ambient | Standard | -40 ...+80 °C [-40 ...+176 °F] |
| Storage | Standard | -30 ...+80 °C [-22 ...+176 °F] |

| Approval | Marking |
|---|---|
| ATEX | Zone 0 gas [II 1G Ex ia IIC T4/T5/T6 Ga] Zone 1 gas [II 2G Ex ia IIC T4/T5/T6 Gb] |
| IECEx | Zone 0 gas [Ex ia IIC T4/T5/T6 Ga] Zone 1 gas [Ex ia IIC T4/T5/T6 Gb] |
| CSA | Class I, division 1, groups A, B, C, D Class I, zone 0; A/Ex ia IIC;T6 ...T4 Ga Class I, zone 1; A/Ex ia IIC;T6 ...T4 Gb Class I, zone 2; A/Ex ic IIC;T6 ...T4 Gc (see control drawing 14136138) |
| FM | Class I, division 1, groups A, B, C, D Class I, zone 0, AEx ia IIC, T6 ...T4 Ga Class I, zone 1, AEx ia IIC, T6 ...T4 Gb Class I, zone 2, AEx ic IIC, T6 ...T4 Gc (see control drawing 14136138) |

| Ambient and media temperature range (Pi = 600 mW) | Ambient and media temperature range (Pi = 800 mW) | Temperature code |
|---|---|---|
| -40 ≤T a ≤ +59 °C | -40 ≤T a ≤ +52 °C | T6 |
| -40 ≤T a ≤ +74 °C | -40 ≤T a ≤ +67 °C | T5 |
| -40 ≤T a ≤ +80 °C | -40 ≤T a ≤ +76 °C | T4 - T1 |

| Ambient and media temperature range (Pi = 600 mW) | Temperature code |
|---|---|
| -40 ≤T a ≤ +59 °C | T6 |
| -40 ≤T a ≤ +74 °C | T5 |
| -40 ≤T a ≤ +80 °C | T4 - T1 |

| 1 | Standard | Option (high-resistance) |
|---|---|---|
| Case | 316L | 318LN |
| Sensor element | 316L | Hastelloy C276 |
| Cable | PUR | FEP |
| Sealing | FKM | FKM |
| Protection cap | PVDF | PVDF |

### Cable outlet

| Standard | Cable outlet without conduit |
|---|---|
| Option | Cable outlet with conduit |

### Cable lengths

| Standard | Metres (m) | 3 | 5 | 10 | 15 | 20 | 25 | 30 | 40 | 50 |
|---|---|---|---|---|---|---|---|---|---|---|
|  | Feet (ft) | 10 | 20 | 30 | 40 | 50 | 75 | 100 | 125 | 150 |
| Option | Metres (m) | For current output, freely definable up to 1,000m |  |  |  |  |  |  |  |  |
|  |  | For voltage output, freely definable up to 200m |  |  |  |  |  |  |  |  |
|  | Feet (ft) | For current output, freely definable up to 3,250 ft |  |  |  |  |  |  |  |  |
|  |  | For voltage output, freely definable up to 650 ft |  |  |  |  |  |  |  |  |

### 4 ... 20 mA, 4 ... 20 mA + HART ® (2-wire)

| U+ | brown (BN) |
|---|---|
| U- | blue (BU) |
| Shield | grey (GY) |

### 2 x 4 ... 20 mA (2 x 2-wire, galvanically isolated)

| U+ (pressure sensor) | brown (BN) |
|---|---|
| U- (pressure sensor) | blue (BU) |
| U+ (temperature sensor) | green (GN) |
| U- (temperature sensor) | white (WH) |
| Shield | grey (GY) |

| Logo | Description | Country |
|---|---|---|
|  | EU declaration of conformity ■ EMCdirective EN 61326 emission (group 1, class B) and immunity (industrial application) ■ RoHS directive ■ ATEX directive 1) - Ex i Zone 0 gas [II 1G Ex ia IIC T4/T5/T6 Ga] Zone 1 gas [II 2G Ex ia IIC T4/T5/T6 Gb] | European Union |
|  | IECEx 1) Hazardous areas - Ex i Zone 0 gas [Ex ia IIC T4/T5/T6 Ga] Zone 1 gas [Ex ia IIC T4/T5/T6 Gb] | International |
|  | FM 1) Hazardous areas Class I, division 1, groups A, B, C, D Class I, zone 0, AEx ia IIC, T6 ...T4 Ga Class I, zone 1, AEx ia IIC, T6 ...T4 Gb Class I, zone 2, AEx ic IIC, T6 ...T4 Gc (see control drawing 14136138) | USA |
|  | CSA ■ Safety (e.g. electr. safety, overpressure, ...) ■ Hazardous areas 1) Class I, division 1, groups A, B, C, D Class I, zone 0; A/Ex ia IIC;T6 ...T4 Ga Class I, zone 1; A/Ex ia IIC;T6 ...T4 Gb Class I, zone 2; A/Ex ic IIC;T6 ...T4 Gc (see control drawing 14136138) | USA and Canada |
|  | EAC ■ EMCdirective | Eurasian Economic Community |

### DC 0.1 ... 2.5 V (3-wire, low power)

| U+ | brown (BN) |
|---|---|
| U- | blue (BU) |
| S+ | black (BK) |
| Shield | grey (GY) |

### 2 x DC 0.1 ... 2.5 V (3-wire, low power)

| U+ | brown (BN) |
|---|---|
| U- | blue (BU) |
| S+ (pressure sensor) | black (BK) |
| S+ (temperature sensor) | green (GN) |
| Shield | grey (GY) |

| Description | Order number |
|---|---|
| Additional weight The additional weight increases the dead weight of the submersible pressure sensor. It simplifies the lowering in monitoring wells, narrow shafts and deep wells. It effectively reduces negative environmental influences of the measuring medium (e.g. turbulent flows) on the measuring result. Stainless steel 316L, approx. 300 g [0.661 lbs], length 115 mm[4.53 in] | 14131008 |
| Cable strain relief clamp The cable strain relief clamp ensures easy and secure mechanical fastening of the submersible pressure sensor's cable. It serves to guide the cable to prevent mechanical damage and to reduce the action of tensile stresses. | 14052336 |
| Cable box The cable socket, with IP67 ingress protection and waterproof ventilati- on element, provides a moisture-free electrical termination for the sub- mersible pressure sensor. It should be mounted in a dry environment, outside any shafts or vessels, or directly in the switch cabinet. | 14052339 |
| Not suitable for hazardous areas! Intrinsically safe repeater power supply, model IS Barrier Input 0/4 ...20 mA, supplying and non-supplying Bidirectional HART ® signal transmission For details see data sheet AC 80.14 | 14117118 |
| Indication and programming module HART ® DIH50 and DIH52 5-digit display, 20-segment bar graph, without separate power supply, with additional HART ® functionality. Automatic adjustment of measuring range and span. 'Secondary-master' functionality: Setting the measuring range and unit of the connected transmitter using HART ® standard commands possib- le. Optionally explosion protection per ATEX. | on request |
| HART ® modem with USB, RS-232 or Bluetooth  interface For scaling the measuring range using a PC via the HART protocol, a HART modem with USB, RS-232 or Bluetooth interface is available. The modem communicates with all registered HART field instruments and can be used with the most popular HART-compatible software programs. | 7957522 (RS-232 interface) 11025166 (USB interface) 11364254 (Bluetooth  interface) |

## Documents

- [ds_lm4004_en_co_32a659](https://avigan.com.ua/wika/docs/wika/ds_lm4004_en_co.pdf) — PDF, 591 KB, en

## Configurator

This product has an interactive configurator on its product page.

```
LF-1 - -2DA-A Z2BZZ-ZZZZZZ-Z
```