LSJ SEED-RA Tragbarer Strahlungsdetektor

Core Capabilities

Six Capabilities in One 50 g Wearable Alarm

Area monitors stay at the perimeter, and passive badges are read back hours after the shift. The LSJ SEED-RA closes both gaps: a CsI(Tl) + SiPM detector that measures X and gamma dose rate continuously and alarms the wearer in under five seconds.

LSJ SEED-RA display close-up reading 0.11 uSv/h with battery gauge, three green status LEDs and radiation trefoil

CAPABILITY 01

Laboratory-Grade Detection Physics in a Pocket-Size Body

The SEED-RA pairs a thallium-doped caesium iodide (CsI(Tl)) scintillation crystal with a silicon photomultiplier (SiPM) — the detection chain of a laboratory counter, reduced to a body that clips onto a vest. It measures X and gamma dose rate from 0.01 μSv/h to 100 mSv/h, tracks cumulative dose to 9999 mSv, and holds relative intrinsic error within ±15% at the Cs-137 reference.

CsI(Tl) scintillator + SiPM; energy response from 30 keV to 3 MeV for X and gamma rays
Energy response error within ±20%, relative intrinsic error within ±15% at Cs-137
Dose rate 0.01 μSv/h – 100 mSv/h; cumulative dose 0.01 μSv – 9999 mSv

CAPABILITY 02

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 unit is wearable-sized rather than a handheld survey meter. The ultrasonic integrated body keeps the exterior smooth and sealed, and the front face carries the live dose display, the radiation trefoil and three green status LEDs that confirm normal operation from across the room.

95 × 30 × 20 mm and 50 g including battery — belt, vest strap or pocket
IP67 sealed housing: dust-tight and waterproof, with no open port on the body
Front display with battery gauge plus three green status LEDs for at-a-glance confirmation

Front view of the LSJ SEED-RA wearable radiation detector showing the dose-rate display and three green status LEDs

LSJ SEED-RA raising an audible and visual radiation alarm, with warning bell icon and red beacon

CAPABILITY 03

Audible, Visual and Phone Alarms on the Same Event

When dose rate rises above standard levels, the SEED-RA sounds an audible alarm and raises its LED visual alarm. It then relays the same event to the wearer’s mobile phone over Bluetooth, so a supervisor pairing each team member’s device sees an over-standard situation even when the detector itself is hidden under protective clothing or inside a pocket.

Alarm response under 5 seconds, as fast as 2 seconds depending on energy level
Three channels — audible, visual and mobile-phone relay — so one blocked path never silences the warning
Bluetooth pairing mirrors every alarm to the wearer’s handset for the supervisor to act on

CAPABILITY 04

Over 100 Hours of Standby, Charged Through the Base

A low-power-consumption design keeps the SEED-RA on standby for more than 100 hours on a single charge — over four days of continuous readiness. Recharging runs through the magnetic charging contacts on the base: nothing to plug in with gloves on, and no connector for dust or water to attack. Between shifts the unit goes back on the charger and returns to full readiness.

More than 100 hours standby on one charge, from a low-power-consumption circuit
Magnetic charging contacts on the base — no open charging port on the housing
Rechargeable between shifts, so the unit starts every tour at full readiness

Bottom view of the LSJ SEED-RA showing the magnetic charging contacts

Rear view of the LSJ SEED-RA with the integrated clip for belt, vest or pocket mounting

CAPABILITY 05

Ready in Four Steps, Before You Cross the Line

Deployment is deliberately short: clip on, power on, pair by Bluetooth, work hands-free. The SEED-RA logs cumulative dose continuously from that moment, so the personal record starts when the operator enters the area rather than at the debrief.

Clip on — the integrated rear clip fixes the unit to a belt, vest strap or pocket before entry
Power on — three green LEDs confirm normal operation and the display shows live background dose rate
Pair by Bluetooth and work hands-free while cumulative dose is logged continuously

CAPABILITY 06

What a Wearable Alarm Adds to the Badge a Team Already Carries

The comparison procurement teams ask for first: a badge proves exposure after the shift, an alarm prevents it. On the operating principles stated on this page the SEED-RA alarms in under five seconds and reads live dose on the device, while a passive dosimeter records only and is read back at base.

Real-time alarm when dose rises: SEED-RA yes, under 5 seconds — passive dosimeter records only
Live dose-rate reading on the device rather than a read-back at base hours later
Cumulative dose to 9999 mSv logged continuously on the unit through the shift
Alarm relayed to a mobile phone over Bluetooth, which a passive badge cannot do

LSJ SEED-RA wearable nuclear radiation alarm detector reading 0.11 uSv/h

Equipping a response team, a plant or a screening point?

Talk to the factory about the dose-range confirmation, Bluetooth relay setup, OEM labelling and bulk supply.

Applications

Where the SEED-RA Goes to Work

Personal radiation alarms are worn by emergency rescue and hazmat crews, radiological survey teams, nuclear facility maintenance staff and screening officers at borders, ports and venues.

LSJ SEED-RA sounding its audible and visual alarm during a hazardous-material response

Emergency Rescue and Hazmat Response

In an accident where the substance is still unknown, rescuers use the SEED-RA to monitor the site surroundings, judge the intensity and dose of any released radioactive material, and assess risk to people and environment before the response plan is fixed. The alarm also reaches the wearer’s phone, so a supervisor standing back from the scene sees the same warning.

LSJ SEED-RA carried into a suspected contaminated outdoor area during a radiological survey

Radiological Environment Inspection

Survey teams walking a suspected contaminated area carry a per-person, continuous dose record instead of perimeter-only readings, and are warned the moment the dose rate rises. Readings describe the position and moment sampled at the wearer only; they do not replace survey procedure, wipe testing or laboratory analysis.

LSJ SEED-RA clipped on for a shift inside a nuclear facility or screening point

Nuclear Plant Monitoring and Security Screening

Maintenance crews working near active systems wear immediate alarm coverage with cumulative dose logging to 9999 mSv, and supervisors receive alarms over Bluetooth relay. The same clip-on suits officers screening cargo, vehicles or venues, where it alarms the instant radiation above standard levels appears without occupying a hand.

Operational Scenario

Damaged Source Store: An Illustrative Deployment

The scenario below illustrates how the SEED-RA may support an entry decision. It is not a documented customer case study.

Illustrative pre-entry dose-rate check on the LSJ SEED-RA display

Example: Pre-Entry Check Outside a Damaged Source Store

Situation

A workshop that stores industrial radiography sources has been damaged in a fire. The incident commander cannot confirm whether the sources are still shielded, and the entry decision has to be taken before a survey team can bring a full instrument into the yard.

Potential use

A responder could clip a SEED-RA to a vest strap, power it on and pair it to a phone before approaching, reading live dose rate from 0.01 μSv/h upward on the display and relying on the under-five-second alarm if the reading climbs. Cumulative dose is logged from that moment. Readings describe the position and atmosphere at the wearer only; the unit does not locate or identify a source, and it does not replace a survey meter, a dosimetry service or the radiological protection officer’s procedure.

Decision support

Findings may inform where the cordon is placed, who may approach, and how long a task inside the area may run under the protection officer’s rules, with the logged cumulative dose supporting the post-incident record. Outcomes depend on source energy, shielding, distance, detector orientation and operator training.

Why Work With LSJ

Manufacturing Capability
Built Around Procurement Needs

Explore the production facilities, compliance documents, and international exhibitions presented in the materials below. Confirm product-specific certifications and current manufacturing capabilities with the supplier before placing an order.

16years Manufacturing
experience

4document types CE · ISO · MSDS · RoHS
shown in supplied image

GLOBAL International trade-show
engagement

Supplied collage of LSJ manufacturing, assembly, and testing areas

01 · PRODUCTION

Assembly and Testing Capability

The supplied company materials describe 16 years of manufacturing experience alongside assembly and testing activities. Confirm the applicable product line, current capabilities, and lead time when requesting a quote.

Supplied collage of CE, ISO, MSDS, and RoHS-related documents

02 · CERTIFIED

Documentation for Due Diligence

Request current, product-specific documents and verify their scope before use in a tender or import review.

CEISOMSDSRoHS

LSJ team and visitors at international trade exhibitions

03 · GLOBAL

Product Discussions at Global Events

Explore images of industry exhibitions and in-person discussions with international partners and emergency-response professionals.

Click an image for a larger view · Request a facility visit or document verification

Request an Operating Demonstration

Ask about clip-on mounting, the three-LED status check and Bluetooth pairing

Operation Video

See the LSJ SEED-RA in Operation

No SEED-RA operating video is published at the time of writing. Ask the factory for a walkthrough of one full cycle: mounting the unit on a vest, the power-on status check, pairing to a handset, and the alarm cascade across the audible, visual and phone channels.

Clip-on mounting and the three-green-LED status check
Pairing to a handset and reading the mirrored alarm
Magnetic charging contact placement between shifts

Technical Specifications

LSJ SEED-RA Specification Sheet

Parameters below are quoted from the manufacturer’s LSJ SEED-RA product information sheet. One figure needs confirmation before ordering: the specification table and body copy state a dose-rate range of 0.01 μSv/h to 100 mSv/h, while the same page’s summary cards read 0.01–100 μSv/h. Confirm the upper bound, and every configuration-specific value, against the latest datasheet.

Parameter	Stated Specification
Product name	Wearable Nuclear Radiation Detector (SEED-RA radiation alarm)
Brand / manufacturer	LSJ — Beijing LSJ Technology Development Co., Ltd.
Positioning	Personal radiation alarm that monitors subtle radiation changes in the natural environment and warns the wearer the moment dose rises above standard levels
Detected radiation	X and γ (gamma) rays
Detector technology	CsI(Tl) scintillation crystal + SiPM
Dose rate range	0.01 μSv/h – 100 mSv/h
Cumulative dose range	0.01 μSv – 9999 mSv
Energy response range	30 keV – 3 MeV
Energy response error	≤ ±20%
Relative intrinsic error	≤ ±15% (@Cs-137)
Response time	< 5 s, as fast as 2 seconds depending on the energy level
Alarm method	Audible + visual + mobile phone — on-device sound and LED indication, with alarm relay to the wearer’s phone over Bluetooth
Communication	Bluetooth — pairs with the wearer’s mobile phone for remote notification
Display	Built-in dose-rate display with battery gauge and status LEDs
Standby time	> 100 hours on a single charge
Charging	Rechargeable — low-power-consumption design with magnetic charging contacts
Overall dimensions	≤ 95 × 30 × 20 mm
Weight	≤ 50 g including battery
Protection level	IP67 — dust-tight and waterproof
Operating temperature	−20 °C – 50 °C
Relative humidity	≤ 95% (at 30 °C, non-condensing)
Typical applications	Emergency rescue, hazardous chemical accidents, radiological environment inspection, nuclear plant monitoring, security checks and other work involving radioactive substances
Manufacturer	Beijing LSJ Technology Development Co., Ltd.
Address	Floors 3 to 17, Building 5, Courtyard 1, Hangfeng Road, Fengtai District, Beijing, China
Phone / WhatsApp	Tel & WeChat: +86 19388919457 · WhatsApp: +1 8402841651
E-mail / website	[email protected] · www.lsj-te.com

Frequently Asked Questions

Procurement and Field Use

Answers to the questions radiation safety officers and procurement teams ask before ordering. Confirm all commercial and technical terms with the supplier.

Which radiation types does the SEED-RA detect, and with what technology?

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. Detection is specified for X and gamma radiation only — no alpha, beta or neutron response is stated by the manufacturer.

What dose ranges can the SEED-RA measure?

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, as quoted in the manufacturer’s specification table. The lower bound resolves natural background levels and the upper bound covers serious radiological incidents. Note that the same page’s summary cards read “0.01–100 μSv/h”; ask the factory to confirm which upper bound applies to your configuration before the instrument enters service.

How fast does the SEED-RA respond to a radiation change?

Response time is under 5 seconds and can be as fast as 2 seconds depending on the energy level. That rapid response is what turns the unit from a dosimeter into an alarm: the wearer is warned while the exposure is still avoidable.

How does the SEED-RA alert the wearer?

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 handset — so protective clothing or a pocket over the detector does not silence the warning.

How long does the battery last, and how is the unit charged?

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.

Is the SEED-RA suitable for harsh field conditions?

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). That covers outdoor rescue and industrial environments; confirm any additional requirement such as drop rating or ATEX classification with the factory.

Who manufactures the SEED-RA, and how can I order it?

It is manufactured by Beijing LSJ Technology Development Co., Ltd., Floors 3 to 17, Building 5, Courtyard 1, Hangfeng Road, Fengtai District, Beijing, China. Contact the factory at [email protected], or by phone and WeChat at +86 19388919457 (WhatsApp +1 8402841651), for pricing, OEM configurations and bulk supply.

Supplier Support

Support from Selection to Service

Technical Selection

Confirm the dose-rate upper bound you need, the radiation types present on site, and whether the alarm has to reach a supervisor’s phone as well as the wearer.

Tender and Demonstration Support

Request the factory datasheet, calibration statement and a sample unit for evaluation, with the documents your tender or radiation protection programme requires.

Calibration and Service

Confirm calibration interval, the reference source used, spare-part and charger supply, and repair turnaround for your delivery market before the units enter service.

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