Veolia Water Technologies & Solutions

Sievers 500 RLe TOC Analyzer

Protect your UPW and fabrication processes with Sievers 500 RLe TOC Analyzers

The Sievers 500 RLe TOC Analyzer is designed to monitor low-level TOC measurements in microelectronics applications. Offering an operating range of 0.03 ppb to 2.5 ppm, this analyzer offers the lowest limit of detection for a reagentless, online ultrapure water TOC analyzer. The 500 RLe utilizes the Sievers membrane conductivity technology to deliver on ultra-low-level accuracy and reliability. The analyzer is easy to operate, with minimal maintenance, and no special training is required. 

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Learn about the NEW Sievers M500e Online TOC Analyzer

Features and Benefits

M500e Online Features & Benefits

Stable. Precise. Always Ready

  • 10" Touchscreen
  • Online and grab sampling - Standard iOS designed to easily switch sampling methods between online and grab
  • Accelerated rinse: Double the speed for faster rinse down after maintenance or at startup
  • Low-level calibration and verification protocols
  • Adaptive autozero
  • WiFi & Ethernet for remote data access
  • IP55 & full IP connections
  • Same footprint as 500 RLe for easy upgrades


M500e Online Specifications

Total Organic Carbon

Linear Range 0.03 to 2,500 ppb as TOC
Accuracy ± 5% of measurement; ±0.1 ppb
Precision ± 1% of measurement; ±0.3 ppb
pH Range 5.5 to 8.0 in order to meet accuracy specification
Analysis Modes On-line, on-line averaged, on-line timed, Grab
Analysis Time1,2 3 minutes for continuous online measurements
Ozone Compatibility 50 ppb Ocontinuous; 200 ppb 03 for 2 hours daily
External Flow Rate Minimum 50 mL/min
Sample Temperature 1–95 °C (34–203 °F) (withstands short-term exposure)
Sample Pressure Up to 100 psig
Interferences Insensitive to organic heteroatoms
Calibration Stability Typically stable for 12 months
Display Readout 3 significant digits


Raw Conductivity Range 0.01 to 800 µS/cm
Conductivity Accuracy 0.005 µS/cm or 1%, whichever is greater
Conductivity Precision <1.0% RSD


Power Requirements 100–240 VAC, 70 W, 50/60 Hz
Fuses No user-replaceable fuses
Normal Operating Environment Intended for indoor use only
Ambient Temperature 5–40°C (41–104°F)
Maximum Relative Humidity Up to 95%, noncondensing
Maximum Altitude 3,000 m (9,843 ft)
Inputs Two isolated binary inputs
Outputs Serial (RS-232), one USB, three 40-20 mA, four alarms, one Ethernet
Installation/Overvoltage II (protects against transients present in Category II power)
Safety Certifications

CE, ETL listed. Conforms to UL Std. 61010-1. Certified to CSA 22.2 No. 61010-1.

Pollution Degree 2 (normally only non-conductive pollution)
Display Backlit 10.1", 1280x800, touchscreen display
Size H: 43.4 cm (17.1 in); W: 55.9 cm (22.0 in); D: 28.7 cm (11.3 in)
Weight 16.3 kg (36 lb)
IP Rating IP 55
Optional Wi-Fi 802.11ac/a/b/g/n Dual-band 2.4/5 GHz
Industrial Communications Protocol Modbus TCP/IP


1Time to first measurement is 10 minutes

2Base model analysis time is six minutes for continuous online measurement


M500e Online Accessories

  • Integrated Online Sampling System (iOS) - capable of standards addition
  • WiFi & Ethernet for remote data access
  • Quick connect I/O fittings