Veolia Water Technologies & Solutions

Sievers M500e Online TOC Analyzer

Detect critical organic contaminants, optimize yield, and ensure ultrapure water quality with new Sievers M500e Online TOC Analyzer

For microelectronics applications and analysis of low-level contaminants, the Sievers M500e builds on the stability of the prior model, the Sievers 500 RLe TOC Analyzer. It advances on the decade-long Sievers legacy with an updated interface, accuracy at ultra-low-levels, and results within minutes.

The M500e will continue to prove critical for microelectronics applications that require ultrapure water quality and is valuable for steam generation systems to analyze low-level contaminants.

Maintaining use of Sievers' reagentless Membrane Conductometric technology still offers high accuracy with an operating range of 0.03 ppb to 2.5 ppm. This new model introduces significantly reduced wait times for results, faster rinse down to sub-ppb levels, and adaptive autozero.

Download Brochure Here

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


  • DLM 78510-03 (Coming soon!)