SEF-Z524MGX HORIBA STEC SEC-Z500X Digital Mass Flow Meter

SEF-Z524MGX | High-Capacity Gas Measurement Platform

HORIBA STEC SEF-Z524MGX is a digital mass flow meter from the SEC-Z500X series. It measures gas flow without an integrated control valve. Its architecture supports multi-gas and multi-range measurement in industrial gas delivery systems.

This model supports several full-scale configurations through selectable MR/MG numbers. Available N2 conversion ranges include 22 SLM, 30 SLM, and 50 SLM. Engineers can select the appropriate range according to process requirements.

The instrument combines DeviceNet communication, precision flow measurement, and polished 316L stainless steel wetted components. Its compact measurement architecture suits semiconductor equipment and precision gas supply applications.

01. Measurement Architecture & Configuration Matrix

Configuration Item	Available Specification
Manufacturer	HORIBA STEC, Japan
Model Number	SEF-Z524MGX
Product Family	SEC-Z500X Series
Instrument Classification	Digital Mass Flow Meter
Related Controller	SEC-Z524MGX
Flow Measurement Principle	Mass flow measurement
Control Valve	Not included in the SEF meter configuration
Full-Scale Configuration	MR/MG selectable ranges
MR/MG #6.5	22 SLM
MR/MG #07	30 SLM
MR/MG #08	50 SLM
Flow Measurement Range	0–100% F.S.
Gas Conversion Reference	N2 conversion flow rate

02. Measurement Performance & Operating Limits

Performance Parameter	Technical Specification
Measurement Accuracy Above 25% F.S.	±1.0% S.P.
Measurement Accuracy At or Below 25% F.S.	±0.25% F.S.
Linearity	≤ ±0.5% F.S.
Repeatability	≤ ±0.2% F.S.
Response Time	≤ 1 second across the full flow range
Operating Temperature	5 to 50°C
Recommended Temperature	15 to 45°C
Operating Differential Pressure	≤ 300 kPa(d) for SEF configuration
Maximum Operating Pressure	450 kPa(g)
Pressure Resistance	1000 kPa(g)
Helium Leak Integrity	≤ 5 × 10⁻¹² Pa·m³/s

Engineering Note: F.S. means full scale. S.P. means set point. Confirm the applicable accuracy specification when evaluating low-flow measurement performance.

03. Mechanical Construction & Electrical Interface

Wetted Material	316L stainless steel
Surface Finish	Polished wetted surfaces
Standard Process Connection	1.5-inch IGS
Optional Connections	1/4-inch VCR equivalent / 1.125-inch IGS
Communication Protocol	DeviceNet™
Power Supply	DC 24 V
Power Consumption	4.0 VA
Power Standard	Conforming to ODVA standards
Mounting Orientation	Flexible orientation

04. Gas Configuration & Application Flexibility

The SEC-Z500X platform supports multiple gas and measurement range configurations. Dedicated configuration software helps engineers identify suitable MR/MG numbers.

• Gas Selection: Enter the process gas type into the configuration software.
• Range Selection: Specify the required full-scale flow rate.
• MR/MG Identification: Select the corresponding configuration number.
• N2 Conversion: Use the nitrogen conversion function during receiving inspections.
• Configuration Verification: Confirm the selected gas and range before commissioning.

HORIBA STEC also provides software operation seminars. Contact a HORIBA STEC representative for training information and software support.

05. Installation & Commissioning Recommendations

Proper installation helps maintain measurement accuracy and process stability. Engineers should verify the following items before startup.

• Process Compatibility: Confirm the gas type and configured flow range.
• Connection Inspection: Match the 1.5-inch IGS fitting with the process piping.
• Clean Gas Lines: Remove particles and contaminants before connecting the instrument.
• Pressure Verification: Maintain differential pressure within the specified operating limits.
• Temperature Control: Prefer the recommended 15–45°C operating range.
• Electrical Wiring: Verify 24 VDC power and DeviceNet wiring.
• Leak Testing: Inspect process connections using an approved leak-testing procedure.
• Initial Verification: Check zero-flow readings and measurement stability.

06. Maintenance & Diagnostic Considerations

• Monitor measurement deviations during normal production.
• Compare actual readings against the configured full-scale range.
• Check DeviceNet communication status when readings become unavailable.
• Inspect gas fittings when unexpected pressure changes occur.
• Review gas configuration after changing the process gas.
• Follow manufacturer procedures for calibration and internal servicing.

Unverified gas configurations can affect measurement accuracy. Avoid changing calibration parameters without authorized technical procedures.

07. System Integration & Model Selection

Model / Component	Function
SEF-Z524MGX	Mass flow measurement without an integrated control valve
SEC-Z524MGX	Mass flow regulation with an integrated control valve
SEC-Z500X Series	Platform for configurable gas flow measurement and control
DeviceNet Network	Digital communication with compatible automation equipment
24 VDC Supply	Electrical power for the instrument

For measurement-only applications, select the SEF configuration. For applications requiring active flow regulation, evaluate the corresponding SEC controller.

Before replacement, verify the MR/MG number, gas calibration, process fitting, electrical connector, and communication settings. Similar model numbers do not guarantee direct interchangeability.

08. Compliance & Documentation

• Communication: DeviceNet™ protocol.
• Power Requirements: ODVA-standard 24 VDC supply.
• Wetted Construction: Polished 316L stainless steel.
• Pressure Integrity: Specified helium leak integrity and pressure resistance.
• Regulatory Approvals: Specific hazardous-area and safety certifications require confirmation from manufacturer documentation.

09. Packaging & Commercial Supply

• HORIBA STEC SEF-Z524MGX mass flow meter.
• Product identification and applicable manufacturer documentation, subject to supply configuration.
• Additional communication accessories require separate confirmation.

Product Condition: New & Original in Factory Packing.

Warranty: Factory Warranty: 12 Months.

Shipping Options: FedEx, UPS, and DHL.

Availability: Contact our sales team for current stock and delivery schedules.

10. Global PLC Spare HUB | Engineering Review

The SEF-Z524MGX addresses gas measurement requirements across several high-flow configurations. Its 22, 30, and 50 SLM options provide practical range selection for different process conditions.

DeviceNet communication simplifies integration with compatible automation networks. The polished 316L stainless steel gas path supports demanding industrial gas applications.

From an engineering perspective, range selection deserves particular attention. A suitable full-scale configuration helps maintain measurement resolution and operating accuracy. Engineers should also verify gas conversion data before accepting replacement equipment.

11. Technical FAQ | Selection, Integration & Field Experience

1. How does full-scale selection affect measurement performance?

Full-scale selection determines the instrument's measurement span. An unnecessarily large range can reduce useful measurement utilization. Select a range that accommodates normal operating flow and expected process peaks.

2. What should engineers consider when replacing an existing gas flow instrument?

Check the original gas calibration, MR/MG number, process connection, pressure conditions, and communication configuration. Mechanical compatibility alone does not establish measurement equivalence. Confirm these parameters before approving a replacement.

3. Why can actual flow readings differ after changing the process gas?

Different gases have different physical properties. The instrument requires the correct gas-specific configuration. Engineers should verify the gas selection and conversion settings before comparing measurement results.

4. How should engineers investigate unstable readings during operation?

Start by checking gas supply pressure and process stability. Then inspect connections for leakage and review DeviceNet communication. Also verify that the configured measurement range matches actual operating conditions.

5. Is the 50 SLM configuration always the best choice for a new installation?

No. The highest range does not automatically provide the best measurement performance. Evaluate normal flow, peak demand, process variation, and required accuracy. Confirm the appropriate MR/MG configuration with the manufacturer before purchasing.

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