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- 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
Price held 7 days after order.
Install + training included
Tailored service plan
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 standard.
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 |
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-rView analyzer →
Dual furnaceELEMENTRAC CS-dView analyzer →
Metals / inductionELEMENTRAC CS-iView analyzer →
Dual furnaceELEMENTRAC CS-dView analyzer →
Metals / inductionELEMENTRAC CS-iView 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 standard.
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 standard.
| 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 |
Product videos
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- ✔ Lead time: configured to order — request current timeline
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- ✔ Ceramic furnace 50–1,000 °C · N₂/O₂/air per stage · crucible-lid handling
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· Lead time: configured to order — request current timelineFrom materials and environmental labs running the ELTRA ELEMENTRAC CS-r
Unedited feedback from combustion-analysis teams.
★★★★★
Carbon and sulfur on coal and coke, and the low-blank port finally gives us reliable low-carbon numbers on soils.
MF
Markus F. QC Engineer · Energy / power plant
★★★★★
Sulfur in oil and fuels across a wide range on the same instrument. The solid-gold IR path has held up well.
LS
Lucia S. Lab Supervisor · Chemistry / plastics
★★★★★
TIC by acidification on building materials to the DIN standard. Reporting is clean and repeatable.
AR
Ahmed R. Materials Engineer · Environment / recycling
Common questions
Don't see yours? Email [email protected] — NDA standard, 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 standard.
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