IAS-TD20 Tritium Ionization Chamber Module for System Integrators
A 2 L tritium ionization chamber with its electrometer, high-voltage monitoring and automatic range switching built in. It runs on 12 VDC and reports Modbus RTU over RS-422, and a mechanical interface makes it easy to build into your own monitoring system.
Quick answer
IAS-TD20 is a oem detector module in the IAS-T tritium monitoring series from Iodine Air Systems. It measures tritium from 3.7 × 10⁴ to 3.7 × 10¹⁰ Bq/m³ (1 µCi/m³ to 1 Ci/m³). Runs on 12 VDC; calibration certificate and certificate of conformance included; price on quotation.
What the IAS-TD20 does
Many tritium monitoring needs are best met inside a larger system: a glovebox, a detritiation skid, a sampling rack or a custom multi-point panel. The IAS-TD20 is the detector part of a tritium monitor, packaged as a component.
The module contains a 2 L cylindrical ionization chamber, an electrometer and signal-processing circuit, high-voltage measurement and automatic range switching. It outputs concentration directly in Bq/m³ over Modbus RTU on RS-422. It needs only a 12 VDC, 1 A supply and 0.5–3 L/min of sample flow from your system.
Key features
- 2 L cylindrical tritium ionization chamber
- Built-in electrometer, signal processing and HV measurement
- Automatic range switching, 3.7 × 10⁴ – 3.7 × 10¹⁰ Bq/m³
- Output in Bq/m³ over Modbus RTU (RS-422 via network-type cable)
- 12 VDC, 1 A power
- Mechanical interface for mounting into host systems
IAS-TD20 specifications
| Detector | Cylindrical ionization chamber, 2 L effective volume |
| Range (SI) | 3.7 × 10⁴ to 3.7 × 10¹⁰ Bq/m³ |
| Range (US units) | 1 µCi/m³ to 1 Ci/m³ (10⁻⁶ to 1 µCi/mL) |
| Range as HTO DAC multiples | 0.05 DAC to 50,000 DAC (HTO DAC 2E-5 µCi/mL) |
| Output units | Bq/m³ |
| Sample flow | 0.5–3 L/min |
| Communication | Modbus RTU, RS-422 over network-type cable |
| Power | 12 V DC, 1 A |
| Dimensions | Ø ≤ 250 mm × H ≤ 300 mm (Ø ≤ 9.8 × ≤ 11.8 in) |
Specifications are nominal manufacturer values and may change. Confirmed values are stated on the quotation and data sheet. DAC multiples use the tritiated-water DAC of 2 × 10⁻⁵ µCi/mL (7.4 × 10⁵ Bq/m³) from 10 CFR 20 Appendix B and 10 CFR 835 Appendix A.
Typical applications
- Glovebox and hot-cell builders adding tritium monitoring
- Detritiation and tritium-removal skid manufacturers
- Custom multi-point tritium panels for fusion facilities
- Research groups building tritium experiments
- Upgrading legacy monitors with a digital detector
US supply, documentation and quality
Iodine Air Systems supplies the IAS-T series as an authorized distributor. Instruments are built by our manufacturing partner to our US configuration. Each quotation states the exact deliverables, lead time and country of origin.
- US power version: 120 V AC / 60 Hz for mains-powered models (export versions for 220–230 V / 50 Hz).
- Factory calibration certificate with every instrument, stating the calibration method and reference standards.
- Certificate of conformance and product certification documents supplied with the quotation.
- Specifications in SI and US units, with ranges stated in µCi/mL and in multiples of the tritium DAC (10 CFR 20 Appendix B / 10 CFR 835 Appendix A), so they drop straight into your procedures.
- Commercial-grade supply. Instruments are supplied as commercial-grade items, not as 10 CFR 50 Appendix B / NQA-1 safety-related items. For safety-related use, we support the purchaser's commercial-grade dedication with critical-characteristic data and test records.
- Price on quotation. Price depends on model, options, quantity, documentation package and destination.
Compare with related IAS-T models
Wall-Mount Process Tritium Detector
Process detector (wall-mount, PLC-ready)
View IAS-TG10 →IAS-TG30Glovebox & Process Tritium Monitor
Process monitor (sealed, all-metal)
View IAS-TG30 →IAS-TA20Rack-Mount Area Tritium Air Monitor
Fixed area monitor (19-inch rack)
View IAS-TA20 →See the full IAS-T tritium monitor range or use the tritium DAC converter to check a reading against your limits.
IAS-TD20 FAQ
Can I buy the IAS-TD20 for integration into my own product?
Yes. It is designed as a component, with a mechanical interface, 12 VDC power and a Modbus RTU output. Volume and OEM pricing are quoted per project.
What does the host system need to provide?
A 12 VDC, 1 A supply, a sample flow of 0.5–3 L/min through the chamber, and a Modbus RTU master on RS-422.
What range does the IAS-TD20 cover?
3.7 × 10⁴ to 3.7 × 10¹⁰ Bq/m³ (1 µCi/m³ to 1 Ci/m³), with automatic range switching.
How much does the IAS-TD20 cost?
The IAS-TD20 is priced on quotation. The price depends on options, quantity, power version, documentation package and delivery destination. Send the quote form on this page or email sales@iodineairsystems.com, and we reply with price, lead time and the list of documents supplied.
Is the IAS-TD20 available for US 120 V power?
Yes. Mains-powered IAS-T models are available in a 120 V AC / 60 Hz US version, and in 220–230 V / 50 Hz for export. The IAS-TD20 module runs on 12 V DC.
What documents come with the IAS-TD20?
A factory calibration certificate, a certificate of conformance, product certification documents and an English operating manual. A commercial-grade dedication support package is available for purchasers who dedicate the instrument for safety-related use.
Request a quote: IAS-TD20
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