Burkert SE35 00423924

Core Technical Specifications

• Compatible Turbine Insert Sizes: DN8, DN15, DN20, DN25, DN32, DN40, DN50 S030 inline sensor inserts
• Measurable Fluid Velocity Range: 0.3 m/s to 10 m/s liquid pipeline flow speed
• Flow Measurement Accuracy: ≤ ±(0.5% full scale + 2.5% measured reading) for clean water at 20 °C
• Measurement Repeatability: ±0.4% of measured flow rate
• Signal Input from Turbine: Magnetic pickup coil pulse signal proportional to turbine rotational frequency
• Standard Output Signals: 4–20 mA analog current output (0–100% flow range), open-collector pulse frequency output
• Relay Outputs: Two independent programmable SPDT relay contacts (5 A / 250 V AC resistive load)
• Serial Communication: RS485 Modbus RTU industrial communication protocol
• Display Interface: Backlit multi-line LCD screen showing instantaneous flow rate, totalized volume, batch counter value, alarm status
• Supply Power Options: 24 V DC (12–36 V DC wide range) or battery-powered standalone mode
• Fluid Temperature Compatibility: -20 °C to +100 °C liquid medium temperature
• Ambient Operating Temperature: -10 °C to +60 °C transmitter head housing temperature
• Protection Rating: IP65 with M12 cable plug connector; IP67 optional gland wiring version
• Transmitter Housing Weight: 0.42 kg

Functional Features

1. Dual Independent Totalizer Counters: Primary non-resettable lifetime flow totalizer, secondary resettable batch counter for dosing and filling batch process control
2. Fully Configurable Relay Switch Functions: Relays programmable for flow low-limit alarm, high-limit alarm, batch dosing complete trigger, empty pipe detection fault alarm
3. Liquid Medium Calibration Library: Pre-programmed calibration factors for water, glycol solutions, light oils, and solvent liquids; user custom calibration factor input capability
4. Empty Pipe Detection Logic: Automatically detects air gap inside pipeline and triggers relay fault signal to eliminate false low-flow measurement readings
5. Temperature Compensation Algorithm: Internal fluid temperature sensor corrects volumetric flow calculation for liquid density thermal expansion variation
6. Password Protected Parameter Lock: Three-level user access password protection prevents unauthorized modification of flow range, relay threshold, and communication settings

Material Composition

• Transmitter Outer Housing: Glass fiber reinforced polypropylene (PP-GF30) chemical resistant plastic
• LCD Display Window: Transparent scratch-resistant polycarbonate with anti-fog coating
• Internal Circuit PCB: FR4 flame-retardant printed circuit board with acrylic conformal coating for moisture resistance
• Relay Contact Components: Silver tin alloy sealed mechanical relays
• Cable Connection Terminals: Nickel-plated brass conductive pins inside M12 connector housing
• Internal Temperature Sensing Element: Platinum thin-film PT1000 resistance temperature sensor

Structural Characteristics

• Rotatable 360° mounting base for flexible LCD display viewing angle adjustment after pipeline installation
• Separate internal compartment layout: Front display/keypad compartment, rear signal processing PCB compartment, isolated wiring terminal cavity
• Four tactile membrane push-buttons integrated below LCD screen for local parameter setup without external software tools
• M12 circular multi-pin connector at base of transmitter housing for combined power, analog output, relay, and Modbus wiring
• Sealed silicone rubber gasket between housing split halves to maintain IP65 environmental protection rating
• Quick-release bayonet locking mechanism attaches SE35 transmitter head to S030 turbine sensor insert without specialized tools

Working Principle

1. Liquid medium flows through inline S030 turbine insert, driving magnetic embedded turbine blades to rotate proportionally to fluid volumetric flow rate
2. Turbine rotation induces low-frequency AC pulse signals in magnetic pickup coil mounted inside S030 sensor insert, pulse frequency directly proportional to instantaneous flow velocity
3. SE35 internal signal conditioning circuit amplifies and filters raw pickup coil pulse signals, eliminates fluid turbulence electrical noise interference
4. Onboard 32-bit microcontroller counts pulse frequency, applies user-programmed medium calibration factor and temperature density compensation to calculate real-time volumetric flow rate
5. Calculated flow value converted to standardized 4–20 mA analog current signal for PLC/control system input and frequency pulse output for external counter equipment
6. Microcontroller compares instantaneous flow rate against programmed relay threshold values; activates corresponding relay contact switch if threshold crossing condition is met; all flow data and totalizer values transmitted via Modbus RTU upon master controller data request

Application Scenarios

• Food & beverage production liquid dosing, beverage filling batch flow monitoring
• Pharmaceutical manufacturing solvent and purified water pipeline flow measurement
• Water treatment plant raw water, chemical additive injection flow control
• Chemical processing plant low-viscosity clean solvent and glycol circulation flow monitoring
• HVAC chilled water and heating hot water balancing flow measurement
• Automotive paint shop coating liquid circulation flow regulation

Installation Requirements

1. Install S030 turbine insert with SE35 transmitter head on straight pipeline section; minimum 10× pipe diameter upstream straight run and 5× pipe diameter downstream straight run to eliminate flow turbulence measurement error
2. Mount transmitter housing vertically with LCD display oriented for operator visibility; avoid overhead inverted mounting for long-term battery-powered operation
3. M12 connector cable must be secured with strain relief clamp to prevent wiring terminal fatigue from pipeline vibration
4. Install bypass ball valve parallel to flow meter assembly for maintenance without full pipeline process shutdown
5. Ensure liquid medium fully fills pipeline bore; install air vent valve at high pipeline elevation upstream of flow meter to eliminate trapped air bubbles
6. Separate flow meter signal wiring from high-current motor and valve power cables with minimum 30 cm routing distance

Operation & Maintenance Precautions

1. Clean S030 turbine blade assembly every 6 months for fluid media containing suspended solid particles to prevent turbine rotation jamming
2. Recalibrate flow meter with reference volumetric standard annually for precision batch dosing applications
3. Do not expose SE35 transmitter housing to direct high-temperature steam cleaning above +60 °C ambient temperature limit
4. If empty pipe fault alarm activates, inspect upstream pipeline air vent valve functionality first before troubleshooting transmitter electronics
5. Avoid measuring liquids with viscosity exceeding 50 mm²/s; high-viscosity fluid degrades turbine measurement linearity
6. Replace internal lithium backup battery every 4 years to retain totalizer counter values during power supply interruptions