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ELTRA ELEMENTRAC CS-r Carbon/Sulfur Analyzer – Resistance Furnace + IR | 20 ppm–100%

With every system

Installation & training on-site setup, gas connection and operator onboarding
Method + calibration a C/S SOP set up on your samples

C-H-S Analyzers, Analysis equipment, Elemental Analyzers

ELTRA ELEMENTRAC CS-r Carbon/Sulfur Analyzer – Resistance Furnace + IR | 20 ppm–100%

Resistance-furnace analyzer for fast, simultaneous carbon and sulfur in organic matrices — combustion up to 1,550 °C with up to four solid-gold infrared cells over 20 ppm to 100 %, and an optimized low-blank sample port for reliable low-carbon analysis.

✔ Simultaneous C/S · 20 ppm–100 % · high sample weights
✔ Resistance furnace to 1,550 °C (1 °C steps) · up to 4 solid-gold IR cells
✔ Low-blank sample port · dual-furnace option · TIC module (DIN EN 15936)
✔ Lead time: configured to order — request current timeline

Prices follow supplier cost and stock availability and are updated regularly. The price you see is today's price — once you order, it's held for 7 days.

Install + training included Tailored service plan

1,550 °C resistance furnace

20 ppm–100 % C/S range

60–180 s per analysis

Gold IR extended cell life

Built for materials QC teams

What your QC lab actually checks

Reliable C/S down to low ppm

Combustion in a resistance furnace to 1,550 °C, with two drying columns and up to four solid-gold infrared cells, determines carbon and sulfur simultaneously from 20 ppm to 100 %. An optimized low-blank sample port with reduced diameter and oxygen purge drastically lowers the atmospheric CO₂ blank, so even low-carbon organic samples are measured reliably. An optional second furnace adds fast fractionated analysis.

An applications engineer on the line

IR-cell configuration, low-blank port and dual-furnace setup, calibration and blank control from engineers who run materials characterization in-house. Sub-4h reply, NDA on request.

About this product

The ELTRA ELEMENTRAC CS-r is a resistance-furnace analyzer for fast, simultaneous carbon and sulfur in predominantly organic matrices. The sample is burned in oxygen at up to 1,550 °C (adjustable in 1 °C steps); after the water vapor is removed by two drying columns, the CO₂ and SO₂ are measured in up to four solid-gold infrared cells over a wide range from 20 ppm to 100 %. An optimized low-blank sample port makes reliable low-carbon analysis possible, and an optional second furnace enables fast fractionated analysis.

Why materials and environmental labs choose the CS-r

Reliable carbon and sulfur in organics — down to low ppm, up to 100 %.

Simultaneous C/S, 20 ppm–100 %

Fast, simultaneous carbon and sulfur over a wide range from 20 ppm to 100 % in a resistance furnace up to 1,550 °C, with high sample weights for heterogeneous matrices.

Optimized low-blank sample port

A reduced-diameter sample port with an oxygen purge at the inlet drastically lowers the atmospheric CO₂ blank, enabling reliable carbon analysis in the low measuring range.

Solid-gold IR path, up to 4 cells

A solid-gold IR path gives extended cell lifetime, and up to four infrared cells with different sensitivities cover both low and high concentrations reliably.

Dual-furnace option + TIC

An optional second furnace (ELTRA Dual Furnace Concept) enables fast fractionated analysis at different temperatures; the TIC module adds direct TIC by acidification to DIN EN 15936.

How Additive Plus supports it

A configured, installed analyzer with a carbon/sulfur method dialed in on your samples.

Step 01

Configure to your samples

We spec the IR cells, sample-port setup, dual-furnace and TIC options to your matrix and concentration range before it ships.

Step 02

Install & train

Factory-trained engineers install the analyzer, connect oxygen and the PC/balance, and train your team on the ELEMENTS software.

Step 03

Method & QC support

We help build the SOP — calibration with standards, blank control, TOC/TIC method and a repeatable carbon/sulfur baseline.

What the CS-r measures

Full technical specifications are in the Specifications tab. Key measurement capability:

Parameter	ELEMENTRAC CS-r
Measured elements	Carbon, sulfur (organic samples)
Measuring range	20 ppm to 100 %
Principle	Resistance furnace to 1,550 °C (1 °C steps) + solid-state infrared absorption
Detection	1–4 infrared cells · solid-gold IR path
Analysis time	~60–180 seconds
Requirements	Oxygen 99.5 % · PC, monitor, 0.0001 g balance

ELTRA ELEMENTRAC CS-r analyzer optimized low-blank sample port — The optimized low-blank sample port — reduced diameter and oxygen purge for reliable low-carbon analysis.

ELTRA ELEMENTRAC CS-r analyzer with TIC module for total inorganic carbon — The optional TIC module determines total inorganic carbon by acidification to DIN EN 15936.

Typical sample materials

Carbon and sulfur in fuels, biomass, soils and organic matrices.

Coal & coke

Fuel and process QC

Oil & fuels

Sulfur content

Plastics & rubber

Composition control

Soil & biomass

TOC / TIC and agriculture

Waste

Carbon and sulfur fractions

Building materials

TIC by acidification

Not sure the CS-r is the right analyzer?

Compare with other ELEMENTRAC combustion analyzers.

Adds hydrogenELEMENTRAC CHS-rCarbon, hydrogen and sulfur in one run.View analyzer →
Dual furnaceELEMENTRAC CS-dTwo furnaces for fractionated C/S analysis.View analyzer →
Metals / inductionELEMENTRAC CS-iInduction furnace C/S for metals and inorganics.View analyzer →

Tell us your sample matrix and the carbon and sulfur range you need to control — our applications engineer will confirm the right CS-r configuration (IR cells, low-blank port, dual furnace, TIC) and calibration approach. Sub-4h reply, NDA on request.

Why source the CS-r through Additive Plus

Authorized channel for ELTRA / Verder Scientific lab equipment — sales, installation, training and service in one place.
Configured to your samples — IR cells, sample-port, dual-furnace and TIC options specified before shipping.
Method development on your samples — calibration, blank control and a repeatable carbon/sulfur / TOC SOP.
<24h response from engineers who run materials characterization in-house. NDA on request.

Brand	ELTRA
Model	ELEMENTRAC CS‑r
Measured elements	carbon, sulfur
Samples	organic
Furnace alignment	horizontal (resistance furnace)
Sample carrier	ceramic boats
Field of application	agriculture, biology, chemistry / plastics, coal / power plant, construction materials, environment / recycling, medicine / pharmaceuticals
Furnace	resistance furnace (ceramic tube), adjustable up to 1550 °C (steps of 1 °C)
Detection method	solid state infrared absorption
Number of IR cells	1 - 4
Material of IR path	gold
Typical analysis time	60 - 180 s
Chemicals required	magnesium perchlorate, sodium hydroxide
Gas required	oxygen 99.5 % pure (2 - 4 bar / 30 - 60 psi)
Power requirements	230 V, 50/60 H, max. heating up current 20 A
Dimensions (W x H x D)	580 x 520 x 750 mm / 22.83 x 20.47 x 29.53 in
Weight	~ 77 kg
Required equipment	PC, monitor, balance (resolution 0.0001g)
Optional accessories	TIC module

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Common questions

Don't see yours? Email [email protected] — NDA on request, typical reply within 4 hours.

What does the ELTRA ELEMENTRAC CS-r measure?

The ELEMENTRAC CS-r determines carbon and sulfur simultaneously in predominantly organic matrices — coal, coke, fuels, oil, plant materials, plastics, rubber, soil and waste. It burns the sample in oxygen in a resistance furnace up to 1,550 °C and measures the released CO₂ and SO₂ by infrared absorption, over a wide range from 20 ppm to 100 %.

How does the measurement work?

The sample is burned in an oxygen atmosphere at up to 1,550 °C, freely adjustable in 1 °C steps. The combustion gases (CO₂, H₂O, SO₂) pass a dust filter and two magnesium-perchlorate drying columns that remove the water vapor, and the dried CO₂ and SO₂ are then measured in up to four infrared cells with different sensitivities. Analysis takes about 60–180 seconds.

How does the low-blank sample port help?

The CS-r (and CHS-r) series uses an optimized sample port with reduced diameter and an oxygen purge at the sample inlet. This drastically reduces the atmospheric CO₂ blank value during sample introduction, which is what makes reliable carbon analysis possible in the low measuring range — down to 20 ppm — on organic samples where the blank would otherwise dominate.

Can the CS-r run TOC and TIC?

Yes. For TOC analysis a chemical tube can be used as a halogen trap to absorb acid residues and halogens. Combined with ELTRA's TIC module, the CS-r determines total inorganic carbon by acidification, enabling direct TIC analysis in soils, building materials and other products in compliance with DIN EN 15936. Additive Plus configures the TIC option to your application.

What is the dual-furnace option?

The CS-r can be connected to an additional furnace without detectors — the ELTRA Dual Furnace Concept, also known from the ELEMENTRAC CS-d. This allows fast fractionated analysis by applying different temperatures, and provides throughput and safety for high sample volumes. It is a good fit when you need to separate carbon fractions or keep a busy lab moving.

What does the CS-r need to run?

It needs oxygen at 99.5 % purity (2–4 bar), an external PC and monitor, and a balance with 0.0001 g resolution. It runs on 230 V, 50/60 Hz (max heating-up current 20 A). Operating options include an external monitor and keyboard, a monitor holder with wireless keyboard, or a touchscreen. The analyzer measures about 580 × 520 × 750 mm and weighs ~77 kg.

What is the lead time, and can Additive Plus set it up?

The ELEMENTRAC CS-r is configured to order; request a quote for the current lead time. Additive Plus is an authorized ELTRA / Verder Scientific channel and handles installation, oxygen and balance connection, calibration and operator training, then helps build your carbon/sulfur and TOC SOP. You can also send a sample for a paid measurement first. Sub-4h reply, NDA on request.

Place your order, or talk to an engineer first

Order ELTRA ELEMENTRAC CS-r Carbon/Sulfur Analyzer – Resistance Furnace + IR | 20 ppm–100% direct, or talk to materials engineer

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ELTRA ELEMENTRAC CS-r Carbon/Sulfur Analyzer – Resistance Furnace + IR | 20 ppm–100%

What your QC lab actually checks

Reliable C/S down to low ppm

An applications engineer on the line

Why materials and environmental labs choose the CS-r

Simultaneous C/S, 20 ppm–100 %

Optimized low-blank sample port

Solid-gold IR path, up to 4 cells

Dual-furnace option + TIC

How Additive Plus supports it

Configure to your samples

Install & train

Method & QC support

What the CS-r measures

Typical sample materials

Not sure the CS-r is the right analyzer?

Why source the CS-r through Additive Plus

Download

Product videos

Other products teams run alongside ELTRA ELEMENTRAC CS-r Carbon/Sulfur Analyzer – Resistance Furnace + IR | 20 ppm–100%

What our customers say

Common questions

Place your order, or talk to an engineer first