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- Installation & training on-site setup, gas connection and operator onboarding
- Method + calibration a CO₂/water SOP set up on your samples
C-H-S Analyzers, Analysis equipment, Elemental Analyzers
ELTRA CW-800 CO₂ & Water Analyzer – Simultaneous IR | Gypsum, Cement & Minerals
Analyzer for the simultaneous determination of carbon dioxide and water — the sample in a quartz boat is heated in a resistance furnace up to 1,000 °C, and released CO₂ (from carbonates) and water are measured by infrared cells in 2–3 minutes.
- ✔ CO₂ + H₂O simultaneously · minimal sample prep
- ✔ Resistance furnace to 1,000 °C (1 °C steps) · 1–2 IR cells · gold IR path
- ✔ Nitrogen carrier · no halogen trap · single/multipoint calibration
- ✔ Lead time: configured to order — request current timeline
Price held 7 days after order.
Install + training included
Tailored service plan
Built for minerals and building-material labs
What your QC lab actually checks
Simultaneous CO₂ and water
Heating a quartz-boat sample in a resistance furnace adjustable to 1,000 °C in 1 °C steps releases residual and crystallization water plus CO₂ from carbonates, which infrared cells measure simultaneously in about 2–3 minutes. A nitrogen carrier with a gold IR path and no halogen trap keeps the method simple and robust for cement, gypsum, minerals, ores and soil.
An applications engineer on the line
IR-cell configuration, temperature program, calibration and blank control from engineers who run materials characterization in-house. Sub-4h reply, NDA standard.
About this product
The ELTRA CW-800 simultaneously determines carbon dioxide and water in inorganic samples. The sample is weighed into a quartz boat and heated in a resistance furnace, adjustable up to 1,000 °C in 1 °C steps; depending on temperature, residual or crystallization water and CO₂ released from carbonates (such as CaCO₃) are measured by infrared cells. A determination takes about 2–3 minutes, needs minimal sample preparation, and uses a nitrogen carrier with no halogen trap required.
Why cement, minerals and building-material labs choose the CW-800
Carbon dioxide and water in one fast, low-prep determination.
CO₂ & H₂O in 2–3 minutes
Simultaneous, precise determination of carbon dioxide and water with minimal sample preparation — rapid, reliable and repeatable for routine QC.
Temperature-selective release
Set the resistance furnace up to 1,000 °C in 1 °C steps to separate residual and crystallization water from CO₂ released by carbonates.
Gold IR path, no halogen trap
Customized infrared cells with a gold IR path extend cell life on halogen- or acid-containing samples; electronic gas-flow control keeps results stable.
Built for lab and production
Robust, low-maintenance design with multilingual software, single- and multipoint calibration and flexible result export — suited to the lab and production control.
How Additive Plus supports it
A configured, installed analyzer with a CO₂/water method dialed in on your samples.
Step 01
Configure to your samples
We spec the IR cells, temperature program and calibration standards to your carbonate and moisture range before it ships.
Step 02
Install & train
Factory-trained engineers install the analyzer, connect the nitrogen and PC/balance, and train your team on weighing and analysis.
Step 03
Method & QC support
We help build the SOP — temperature steps, calibration, blank control and a repeatable CO₂/water baseline.
What the CW-800 measures
Full technical specifications are in the Specifications tab. Key measurement capability:
| Parameter | CW-800 |
|---|---|
| Measured | Carbon dioxide (from carbonates) and water |
| Principle | Thermal release (resistance furnace to 1,000 °C, 1 °C steps) + solid-state infrared absorption |
| Detection | 1–2 infrared cells · gold IR path · no halogen trap |
| Carrier gas | Nitrogen 99.995 % (2–4 bar) |
| Analysis time | ~2–3 minutes (120–180 s) |
| Requirements | PC, monitor, 0.0001 g balance · quartz boats |
Typical sample materials
Where carbonate CO₂ and bound water have to be quantified.
Cement & gypsum
CO₂ and crystallization water
Limestone
Carbonate content
Minerals & ores
Geology and mining
Soil
Carbonate and moisture
Construction materials
Incoming and process QC
Environment / recycling
Carbonate and water fractions
Not sure the CW-800 is the right analyzer?
Compare with related ELTRA analyzers in our catalog.
Compact variantELTRA CW-800MView analyzer →
Surface carbonELTRA SurfaceC-800View analyzer →
Carbon / sulfurELTRA CS-580AView analyzer →
Surface carbonELTRA SurfaceC-800View analyzer →
Carbon / sulfurELTRA CS-580AView analyzer →
Tell us your material and whether you need carbonate CO₂, bound water, or both — our applications engineer will confirm the right CW-800 configuration (IR cells, temperature program) and calibration approach. Sub-4h reply, NDA standard.
Why source the CW-800 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, temperature program and calibration specified before shipping.
- Method development on your samples — temperature steps, calibration, blank control and a repeatable CO₂/water SOP.
- <24h response from engineers who run materials characterization in-house. NDA standard.
| Brand | ELTRA |
| Model | CW-800 |
| Measured elements | carbon dioxide, water |
| Furnace alignment | horizontal |
| Sample carrier | quartz boats |
| Field of application | construction materials, environment / recycling, geology / mining |
| Furnace | resistance furnace with quartz tube, adjustable up to 1000 °C |
| Detection method | solid state infrared absorption |
| Number of IR cells | 1 - 2 |
| Material of IR path | gold |
| Typical analysis time | 120 - 180 s |
| Chemicals required | magnesium perchlorate, sodium hydroxide |
| Gas required | nitrogen 99.995 % pure (2 - 4 bar / 30 - 60 psi) |
| Power requirements | 230 V, 50/60 Hz, max. 10 A, 2300 W |
| Dimensions (W x H x D) | 550 x 800 x 600 mm / 21.65 x 31.5 x 23.62 in |
| Weight | ~ 65 kg |
| Required equipment | PC, monitor, balance (resolution 0.0001g) |
| Optional accessories | voltage stabilizer 5 KVA |
Product videos
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· Lead time: configured to order — request current timelineFrom cement, minerals and building-material labs running the ELTRA CW-800
Unedited feedback from QC teams.
★★★★★
CO₂ from carbonate and crystallization water in one run. It replaced two separate methods in our cement QC.
MF
Markus F. QC Engineer · Cement / construction
★★★★★
Carbonate content on ores is fast and repeatable. The nitrogen carrier and no halogen trap keep maintenance low.
LS
Lucia S. Lab Supervisor · Geology / mining
★★★★★
Gypsum crystallization water is now a two-minute number. The temperature steps separate water from CO₂ cleanly.
AR
Ahmed R. Materials Engineer · Building materials
Common questions
Don't see yours? Email [email protected] — NDA standard, typical reply within 4 hours.
What does the ELTRA CW-800 measure?
The CW-800 simultaneously determines carbon dioxide and water in inorganic samples. The CO₂ is released from carbonates (for example CaCO₃) and the water is residual or crystallization water bound in the sample. It is used mainly for gypsum, cement, limestone, minerals, ores and soil, where both the carbonate and moisture fractions are quality-control parameters.
How does the measurement work?
You weigh the sample into a quartz boat and place it on the loading mechanism of the furnace. The resistance furnace is set to a defined temperature up to 1,000 °C, and depending on that temperature the water and CO₂ are released and carried by nitrogen to the infrared cells. An external PC controls the process and calculates the result. A determination takes about 2–3 minutes.
Which materials is the CW-800 used for?
The CW-800 is designed for inorganic matrices: gypsum, cement, limestone, minerals, ores and soil. It is widely used in construction-material, geology/mining and environment/recycling labs to determine carbonate CO₂ and bound water. Because sample preparation is minimal, it suits both routine incoming inspection and process control.
Why does it use nitrogen and no halogen trap?
The CW-800 releases CO₂ and water thermally rather than by combustion, so it uses a nitrogen carrier (99.995 %) instead of oxygen. Customized infrared cells with a gold IR path extend cell life on halogen- or acid-containing samples, which is why no separate halogen trap is required. Electronic gas-flow control keeps the measurement conditions stable.
How is the CW-800 calibrated?
Calibration uses certified standard materials and supports both single-point and multipoint calibration. One or two infrared cells can be combined for a wide dynamic measuring range, and the multilingual software allows customized displays and result export. Additive Plus sets up the calibration and a repeatable method on your samples during installation.
What does the CW-800 need to run?
It needs nitrogen at 99.995 % 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 10 A, 2,300 W) and uses magnesium perchlorate and sodium hydroxide as reagents. A 5 kVA voltage stabilizer is available for unstable supplies. The analyzer measures about 550 × 800 × 600 mm and weighs ~65 kg.
What is the lead time, and can Additive Plus set it up?
The CW-800 is configured to order; request a quote for the current lead time. Additive Plus is an authorized ELTRA / Verder Scientific channel and handles installation, nitrogen and balance connection, calibration and operator training, then helps build your CO₂/water 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 CW-800 CO₂ & Water Analyzer – Simultaneous IR | Gypsum, Cement & Minerals direct, or talk to materials engineer