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Detector Nuclear Radiation SEED-RA
Personal Radiation Alarm - CsI(Tl)+SiPM Detection, Audible / Visual / Phone Alerts, IP67
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Description
Wearable Radiation Detection — Personal Dose Alarm
LSJ SEED-RA Wearable Nuclear Radiation Detector
CsI(Tl) + SiPM detection · Audible + visual + phone alarms · IP67 body, ≤50 g
Figure: The LSJ SEED-RA wearable nuclear radiation alarm — a CsI(Tl) scintillator plus SiPM detector in a 50 g clip-on body, reading 0.11 µSv/h.
Every responder who enters a radiological area carries a personal obligation: know the dose before it becomes a dose record. Fixed area monitors cover a gate or a room, but they stay behind the moment a worker walks into the hot zone. The LSJ SEED-RA closes that gap as a wearable nuclear radiation detector that clips onto a belt, vest or pocket and continuously measures X and gamma dose rate across 0.01 µSv/h to 100 mSv/h, alarming the wearer in under five seconds when radiation rises above standard levels.
Direct Answer
What is the LSJ SEED-RA radiation detector?
The LSJ SEED-RA is a wearable nuclear radiation alarm manufactured by Beijing LSJ Technology Development Co., Ltd. It pairs a CsI(Tl) scintillation crystal with a silicon photomultiplier (SiPM) to detect X and gamma rays from 30 keV to 3 MeV, measures dose rates from 0.01 µSv/h to 100 mSv/h and cumulative dose up to 9999 mSv, responds in under 5 seconds (as fast as 2 seconds), and warns the wearer through audible, visual and mobile-phone alarms over Bluetooth. Weighing no more than 50 g with IP67 sealing and over 100 hours of rechargeable standby, it is built for emergency rescue, chemical accident response, radiological environment inspection, nuclear plant monitoring and security checks.
Why Personal Dose Monitoring Fails Without a Wearable Alarm
In radiological operations the dose a worker actually receives is decided in the first minutes on site, long before a badge is read back at base. Three failure modes repeat across emergency response, industrial inspection and nuclear facility work:
- Area monitors stay at the perimeter — the worker walks away from the instrument, and the instrument stops protecting them.
- Passive dosimeters record dose but never warn — an overexposure is discovered hours later, after the shift, when prevention is no longer possible.
- Bulky survey meters occupy a hand — a rescuer working a debris pile cannot hold a meter, a tool and a radio at the same time.
SEED-RA vs Passive Dosimeter — Side by Side
The comparison procurement teams ask for first: what does a wearable alarm add to the badges a team already carries?
Comparison based on the operating principles described on this page: the SEED-RA alarms in under 5 seconds, while passive dosimeters are read back after the shift.
Detection Performance in a Wearable-Sized Body
Laboratory-grade detection, pocket-size body
CsI(Tl) scintillator plus SiPM detector. The SEED-RA uses the same detection physics as laboratory-grade counters — a thallium-doped caesium iodide crystal coupled to a silicon photomultiplier — achieving highly sensitive detection in a device small enough to forget on a vest. It resolves dose rates from 0.01 µSv/h (natural background) up to 100 mSv/h, tracks cumulative dose to 9999 mSv, and holds relative intrinsic error within ±15% at the Cs-137 reference.
The built-in display shows the live dose rate together with a battery gauge and three status LEDs, so the wearer confirms the reading at a glance without a phone or a console.
Figure: Close-up of the LSJ SEED-RA display reading 0.11 µSv/h with battery level — continuous real-time dose-rate monitoring from 0.01 µSv/h to 100 mSv/h.
A 50 g clip-on that disappears on the uniform
At no more than 95 × 30 × 20 mm and 50 g including the battery, the SEED-RA is genuinely wearable-sized. The ultrasonic integrated body keeps the exterior smooth and sealed, and the front face carries the live dose display, the radiation trefoil marking and the three green status LEDs that confirm normal operation from across the room.
Figure: Front view of the LSJ SEED-RA — a pocket-size 95 × 30 × 20 mm body with live dose-rate display and three green status LEDs.
Three alarm channels: audible, visual and phone
When dose rate rises, the SEED-RA raises an audible alarm and a visual alarm on its LEDs, then relays the alarm to the wearer’s mobile phone over Bluetooth. A supervisor pairing each team member’s device can see an over-standard situation the moment it happens — even when the detector itself is hidden under protective clothing or inside a pocket. Alarm escalation is multi-dimensional by design, so a single blocked channel never silences a warning.
Figure: The LSJ SEED-RA raising an audible and visual alarm — sound, LED and mobile-phone notification protect workers the moment dose rises.
Over 100 hours of standby, then drop it on the charger
A low-power-consumption design keeps the SEED-RA on standby for more than 100 hours — over four days of continuous readiness on one charge. Recharging runs through the magnetic charging contacts on the base: no open ports, nothing to plug in with gloves on, and nothing for dust or water to attack. Between shifts the unit goes back on the charger and returns to full readiness.
Figure: Bottom magnetic charging contacts of the LSJ SEED-RA — drop it on the charger and the unit returns to over 100 hours of standby.
Deployment Sequence: Ready in Seconds
1Clip on
Fix the SEED-RA on a belt, vest strap or pocket with the integrated rear clip before entering the radiological area.
2Power on
The three green status LEDs confirm normal operation and the display shows the live background dose rate.
3Pair by Bluetooth
Connect the unit to the wearer’s mobile phone so alarms are mirrored to the handset.
4Work hands-free
The detector logs cumulative dose continuously and alarms in under 5 seconds if radiation rises above standard levels.
Figure: Rear clip of the LSJ SEED-RA — the unit clips onto a belt, vest or pocket so both hands stay free during radiological operations.
Where the SEED-RA Works
Frequently Asked Questions — LSJ SEED-RA
Straight answers to the questions procurement teams and safety officers ask before ordering.
Q: Which radiation types does the SEED-RA detect, and with what technology?
A: It detects X-rays and gamma rays using a CsI(Tl) scintillation crystal coupled to a silicon photomultiplier (SiPM). Energy response spans 30 keV to 3 MeV with energy response error within ±20%, and relative intrinsic error within ±15% at the Cs-137 reference source.
Q: What dose ranges can the SEED-RA measure?
A: The dose-rate range is 0.01 µSv/h to 100 mSv/h, and the cumulative dose range is 0.01 µSv to 9999 mSv. The lower bound resolves natural background levels, while the upper bound covers serious radiological incidents.
Q: How fast does the SEED-RA respond to a radiation change?
A: Response time is under 5 seconds and can be as fast as 2 seconds depending on the energy level. This rapid response is what turns the unit from a dosimeter into an alarm.
Q: How does the SEED-RA alert the wearer?
A: Through three channels: an audible alarm, a visual alarm on the device’s LEDs, and a mobile-phone alarm relayed over Bluetooth. The wearer hears the device, sees its indicators, and receives the alarm on the paired phone.
Q: How long does the battery last, and how is the unit charged?
A: Standby time is over 100 hours thanks to a low-power-consumption design. The SEED-RA is rechargeable through the magnetic charging contacts on its base, with no open ports on the housing.
Q: Is the SEED-RA suitable for harsh field conditions?
A: Yes. The housing is rated IP67 — dust-tight and waterproof — and the unit operates from -20°C to 50°C at relative humidity up to 95% (at 30°C, non-condensing), covering outdoor rescue and industrial environments.
Q: How is the SEED-RA worn during operations?
A: At no more than 95 × 30 × 20 mm and 50 g including the battery, it clips onto a belt, vest or pocket with the integrated rear clip, leaving both hands free for rescue or inspection work.
Q: Who manufactures the SEED-RA and how can I order it?
A: It is manufactured by Beijing LSJ Technology Development Co., Ltd. Contact the factory at [email protected] or by phone and WhatsApp at +86 19388919457 (WhatsApp: +1 8402841651) for pricing, OEM configurations and bulk supply.
About the Manufacturer
The SEED-RA is designed and manufactured by Beijing LSJ Technology Development Co., Ltd., a Beijing-based developer of security and rescue detection systems including radar life detectors, through-wall radars, gas imaging cameras and wearable radiation monitors. Buyers deal with the factory directly — the same engineering team that specifies the instrument answers technical questions before and after the sale.
Beijing LSJ Technology Development Co., Ltd.
Floors 3 to 17, Building 5, Courtyard 1, Hangfeng Road, Fengtai District, Beijing, China
Tel / WeChat: +86 19388919457 · WhatsApp: +1 8402841651
E-mail: [email protected] · Website: www.lsj-te.com
Put a SEED-RA on every responder entering the hot zone.
Factory-direct pricing · OEM labelling · Bulk supply from Beijing LSJ Technology
| Request a Quote |
✉ [email protected] · +86 19388919457 · WhatsApp +1 8402841651
Technical Data · Official Datasheet
LSJ SEED-RA Technical Specifications
Wearable nuclear radiation detector — CsI(Tl) scintillator + SiPM personal dose alarm for X and gamma rays, quoted verbatim from the official SEED-RA product information sheet.
0.01–100 µSv/h30 keV – 3 MeV< 5 s Response> 100 h StandbyIP67 · ≤50 g
Specifications are quoted from the official LSJ SEED-RA Detector Nuclear Radiation product information sheet. OEM configurations and private labelling are available on request.
