Free U.S. shipping on orders over $200 · Mutual NDA standard before any file review.
Talk to an engineer →
In stock
With every system
- Installation & training on-site setup, gas connection and operator onboarding
- Method + calibration a C/H/S SOP set up on your samples
C-H-S Analyzers, Analysis equipment, Elemental Analyzers
ELTRA ELEMENTRAC CHS-r Carbon/Hydrogen/Sulfur Analyzer – Resistance Furnace + IR | 20 ppm–100%
Resistance-furnace analyzer for fast, simultaneous carbon, hydrogen and sulfur in organic matrices — combustion up to 1,550 °C with a heated H₂O infrared cell for hydrogen and solid-gold IR cells over 20 ppm to 100 %.
- ✔ Simultaneous C / H / S · 20 ppm–100 % · high sample weights
- ✔ Resistance furnace to 1,550 °C · heated H₂O IR cell · up to 3 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
Carbon, hydrogen and sulfur in one run
Combustion in a resistance furnace to 1,550 °C, with a heated H₂O infrared cell followed by additional gold infrared cells, determines carbon, hydrogen 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 and hydrogen-cell configuration, low-blank port setup, calibration and blank control from engineers who run materials characterization in-house. Sub-4h reply, NDA standard.
About this product
The ELTRA ELEMENTRAC CHS-r is a resistance-furnace analyzer for fast, simultaneous carbon, hydrogen and sulfur in predominantly organic matrices. The sample is burned in oxygen at up to 1,550 °C; the combustion gases first pass a heated H₂O infrared cell for hydrogen, then the CO₂ and SO₂ are measured in additional infrared cells over a wide range from 20 ppm to 100 %. An optimized low-blank sample port and solid-gold IR paths give reliable low-carbon analysis and extended cell life.
Why materials and environmental labs choose the CHS-r
Carbon, hydrogen and sulfur in one run — down to low ppm, up to 100 %.
Simultaneous C/H/S
Fast, simultaneous carbon, hydrogen and sulfur in a resistance furnace up to 1,550 °C, with high sample weights for heterogeneous organic matrices.
Heated H₂O IR cell for hydrogen
A dedicated heated water infrared cell captures the hydrogen as H₂O directly after the furnace, adding hydrogen to the carbon and sulfur determination.
Low-blank port, 20 ppm–100 %
A reduced-diameter sample port with oxygen purge drastically lowers the atmospheric CO₂ blank, enabling reliable carbon analysis in the low measuring range down to 20 ppm.
Gold IR path, dual-furnace + TIC
Solid-gold IR paths extend cell life, two drying columns protect the optics, and options include a second furnace for fractionated analysis and a TIC module.
How Additive Plus supports it
A configured, installed analyzer with a C/H/S method dialed in on your samples.
Step 01
Configure to your samples
We spec the IR cells, hydrogen cell, sample-port, 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 method and a repeatable C/H/S baseline.
What the CHS-r measures
Full technical specifications are in the Specifications tab. Key measurement capability:
| Parameter | ELEMENTRAC CHS-r |
|---|---|
| Measured elements | Carbon, hydrogen, sulfur (organic samples) |
| Measuring range | 20 ppm to 100 % |
| Principle | Resistance furnace to 1,550 °C (1 °C steps) + heated H₂O IR cell + solid-state IR |
| Detection | 1–3 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, hydrogen and sulfur in fuels, biomass, soils and organic matrices.
Coal & coke
Fuel and process QC
Oil & fuels
C/H/S content
Plastics & rubber
Composition control
Soil & biomass
TOC and agriculture
Waste
Carbon and sulfur fractions
Building materials
TIC by acidification
Not sure the CHS-r is the right analyzer?
Compare with other ELEMENTRAC combustion analyzers.
Carbon / sulfur onlyELEMENTRAC CS-rView analyzer →
A-series C/H/SELTRA CHS-580AView analyzer →
Dual furnaceELEMENTRAC CS-dView analyzer →
A-series C/H/SELTRA CHS-580AView analyzer →
Dual furnaceELEMENTRAC CS-dView analyzer →
Tell us your sample matrix and whether you need hydrogen alongside carbon and sulfur — our applications engineer will confirm the right CHS-r configuration (IR cells, low-blank port, dual furnace, TIC) and calibration approach. Sub-4h reply, NDA standard.
Why source the CHS-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, hydrogen cell, sample-port and TIC options specified before shipping.
- Method development on your samples — calibration, blank control and a repeatable C/H/S / TOC SOP.
- <24h response from engineers who run materials characterization in-house. NDA standard.
| Brand | ELTRA |
| Model | ELEMENTRAC CHS‑r |
| Measured elements | carbon, hydrogen, 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 - 3 |
| 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 Hz max. heat up current 2000 W |
| 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
Other products teams run alongside ELTRA ELEMENTRAC CHS-r Carbon/Hydrogen/Sulfur Analyzer – Resistance Furnace + IR | 20 ppm–100%
Analysis equipment
ELTRA ELEMENTRAC ONH-p 2 Oxygen/Nitrogen/Hydrogen Analyzer – Inert Gas Fusion | Steel, Metals & Titanium
Inert-gas-fusion analyzer for oxygen, nitrogen and hydrogen in metals — the sample melts in a graphite crucible in an 8.5 kW impulse furnace above 3,000 °C, with IR detection of oxygen and thermal conductivity for nitrogen and hydrogen.
- ✔ O / N / H by fusion · single or ON / OH / NH / ONH · inorganic samples
- ✔ 8.5 kW impulse furnace > 3,000 °C · closed gas system · low detection limits
- ✔ Up to 2000 mg · 32-position autoloader · Autocleaner · argon possible
- ✔ Lead time: configured to order — request current timeline
In stock
· Lead time: configured to order — request current timeline
Analysis equipment
ELTRA ELEMENTRAC CS-d Dual-Furnace Carbon/Sulfur Analyzer – Induction + Resistance | ppm–100%
Dual-furnace analyzer that combines an induction furnace (above 2,000 °C) and a resistance furnace (to 1,550 °C) in one instrument — carbon and sulfur in both inorganic and organic samples, from ppm to 100 %, with up to four gold infrared cells.
- ✔ ELTRA Dual Furnace (EDF) · induction + resistance · organic & inorganic C/S
- ✔ ppm to 100 % · up to 4 independent IR cells · gold IR path
- ✔ Intelligent lance · low-blank port · 36/130 autoloader · TIC · halogen trap
- ✔ Lead time: configured to order — request current timeline
In stock
· Lead time: configured to order — request current timeline
Analysis equipment
ELTRA CHS-580A C/H/S Combustion Analyzer – Carbon, Hydrogen & Sulfur | 0.005–100%
Combustion analyzer for the simultaneous determination of carbon, hydrogen and sulfur — the sample is burned in a resistance furnace up to 1,550 °C and measured by up to four infrared cells, covering 0.005–100 % in 60–180 seconds.
- ✔ C / H / S + TOC / TIC · 0.005–100 % · single or multi-element
- ✔ Resistance furnace to 1,550 °C (1 °C steps) · up to 4 IR cells · gold IR path
- ✔ 50–500 mg samples · optional 36/130-position autoloader (acid-resistant)
- ✔ Lead time: configured to order — request current timeline
In stock
· Lead time: configured to order — request current timeline
Analysis equipment
ELTRA ELEMENTRAC OH-p 2 Oxygen/Hydrogen Analyzer – Inert Gas Fusion | Steel, Metals & Ceramics
Inert-gas-fusion analyzer for oxygen and total hydrogen in metals — the sample melts in a graphite crucible in an 8.5 kW impulse furnace above 3,000 °C, with IR detection of oxygen and thermal conductivity for hydrogen.
- ✔ O / H by fusion · single or combined OH · inorganic samples
- ✔ 8.5 kW impulse furnace > 3,000 °C · closed gas system · low detection limits
- ✔ Up to 2000 mg · nitrogen carrier · Schuetze reagent · Autocleaner option
- ✔ Lead time: configured to order — request current timeline
In stock
· Lead time: configured to order — request current timeline
Analysis equipment
ELTRA ELEMENTRAC CN-r Carbon/Nitrogen Dumas Analyzer – Protein & Nitrogen | Food, Feed & Soil
Automated Dumas analyzer for nitrogen / protein and carbon — reliable results in under three minutes with interleave processing, over 70× faster than Kjeldahl, on any solid or liquid matrix.
- ✔ Dumas nitrogen / protein + carbon · validated by AOAC, ISO, DIN, AOCS, OIV
- ✔ < 3 min · interleave analysis · TCD (N) + NDIR (C)
- ✔ Integrated PC + touchscreen · FDA 21 CFR Part 11 · CN-r or N-r
- ✔ Lead time: configured to order — request current timeline
In stock
· Lead time: configured to order — request current timeline
Analysis equipment
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
In stock
· Lead time: configured to order — request current timeline
Analysis equipment
ELTRA ELEMENTRAC CS-i Induction Carbon/Sulfur Analyzer – Metals & Ceramics | 0.6 ppm–6%+
Induction-furnace analyzer for carbon and sulfur in inorganic samples and metals — combustion above 2,000 °C with up to four infrared cells covering 0.6 ppm to more than 6 % at 1,000 mg, in about 40 seconds.
- ✔ Induction furnace > 2,000 °C · single or simultaneous C/S · metals & inorganics
- ✔ 0.6 ppm to 6 %+ · up to 4 IR cells · heated dust trap · Pt catalyst
- ✔ ~40 s analysis · optional 36/130-position autoloader · TIC module
- ✔ Lead time: configured to order — request current timeline
In stock
· Lead time: configured to order — request current timeline
Analysis equipment
ELTRA CS-580A Carbon/Sulfur Combustion Analyzer – C & S, TOC/TIC | 0.005–100%
Combustion analyzer for the simultaneous determination of carbon and sulfur — the sample is burned in a resistance furnace up to 1,550 °C and measured by up to four infrared cells, covering 0.005–100 % in 60–120 seconds.
- ✔ C / S + TOC / TIC · 0.005–100 % · single or multi-element
- ✔ Resistance furnace to 1,550 °C (1 °C steps) · up to 4 IR cells · gold IR path
- ✔ 50–500 mg samples · optional 36/130-position autoloader (acid-resistant)
- ✔ Lead time: configured to order — request current timeline
In stock
· Lead time: configured to order — request current timelineFrom materials and environmental labs running the ELTRA ELEMENTRAC CHS-r
Unedited feedback from combustion-analysis teams.
★★★★★
Carbon, hydrogen and sulfur on coal in a single run. The heated water cell added hydrogen without slowing us down.
MF
Markus F. QC Engineer · Energy / power plant
★★★★★
C/H/S on plastics and rubber compounds is repeatable, and the low-blank port helps with our trace-carbon work.
LS
Lucia S. Materials Engineer · Chemistry / plastics
★★★★★
Hydrogen and carbon on biomass fuels for our reporting. Calibration with standards is quick and stable.
AR
Ahmed R. Lab Supervisor · Environment / recycling
Common questions
Don't see yours? Email [email protected] — NDA standard, typical reply within 4 hours.
What does the ELTRA ELEMENTRAC CHS-r measure?
The ELEMENTRAC CHS-r determines carbon, hydrogen 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 H₂O, CO₂ and SO₂ by infrared absorption, over a wide range from 20 ppm to 100 %. It is the CS-r with a dedicated hydrogen channel added.
How is hydrogen measured?
After combustion, the gases (CO₂, H₂O, SO₂) pass a dust filter and then a heated H₂O infrared cell, which measures the water released from the sample's hydrogen before the water vapor is chemically absorbed. The dried CO₂ and SO₂ are then measured in additional infrared cells. Combining up to three infrared cells with different sensitivities gives simultaneous carbon, hydrogen and sulfur in about 60–180 seconds.
How does the low-blank sample port help?
The CHS-r (and CS-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 the result.
Can the CHS-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 analyzer 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 CHS-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 useful when you need to separate carbon fractions or keep a busy lab moving without a second full instrument.
What does the CHS-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 heat-up current 2,000 W) and uses magnesium perchlorate and sodium hydroxide as reagents. 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 CHS-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 C/H/S 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 CHS-r Carbon/Hydrogen/Sulfur Analyzer – Resistance Furnace + IR | 20 ppm–100% direct, or talk to materials engineer