ADC Adscope 604 Pediatric Stethoscope, 29.5 in, Light Blue (604LB)
The ADC Adscope 604 (item 604LB, light blue) is a pediatric clinician stethoscope built around a combination chestpiece machined from surgical stainless steel, sized for small patients: a 1 3/8 inch diaphragm and a 1 1/8 inch bell that sit flat on a child's chest wall instead of bridging ribs. Made by American Diagnostic Corporation, it uses ADC's AFD Technology so the diaphragm side can be tuned from low to high frequency by changing hand pressure, and it carries a lifetime warranty on all parts. Pacific Biomedical supplies it as a genuine ADC instrument for EMS, pediatrics, school health, urgent care, and hospital patient assessment.
Product Highlights
- Pediatric combination chestpiece machined from surgical stainless steel, with a 1 3/8 inch diaphragm and a 1 1/8 inch bell scaled to a small chest wall.
- ADC's AFD Technology (Adjustable Frequency Design) lets you shift the diaphragm from low-frequency to high-frequency response with hand pressure, so you can stay on one side of the chestpiece through most of an exam.
- Non-chill retaining rims on both the bell and the diaphragm, which matters when the patient is a child who will react to a cold instrument.
- 22 inch PVC tubing, phthalate-free since 2014, on stainless steel binaurals angled at 15 degrees with a molded reinforcing Y-yoke at the split.
- Adsoft Plus silicone snap-on eartips fitted, plus two spare pairs in the box, so a worn or lost tip does not take the scope out of service.
- Light, at 4.6 oz (131 g), and 29.5 inches overall, which keeps it comfortable around the neck across a full shift.
- Lifetime warranty on all parts from American Diagnostic Corporation, and not made with natural rubber latex.
Choosing and Using a Pediatric Chestpiece
A pediatric chestpiece is smaller so it can seal against a small chest. On an infant or young child an adult-sized diaphragm tends to span ribs and intercostal spaces rather than sit flat, and any gap lets ambient noise in. Pediatric chestpieces are sized down for exactly that reason.1 The 604 pairs a 1 3/8 inch diaphragm with a 1 1/8 inch bell.
Bell and diaphragm are not interchangeable. Acoustic bench testing of six widely used stethoscopes found that, for a given instrument, the bell and the diaphragm usually have different transmission characteristics, most noticeably at low frequencies.2 In practice the diaphragm favors higher-frequency sounds such as breath sounds and normal heart tones, while the bell favors low-frequency sounds such as some murmurs and bruits.1
One widely repeated belief is worth correcting: the bell was not designed for pediatric patients. Its purpose is low-frequency listening, and the fact that a smaller bell also fits a small chest is a convenience, not the design intent.3 That distinction is why a purpose-built pediatric chestpiece, rather than the bell side of an adult scope, is the better answer for small patients. Per the manufacturer's instructions for use, the Adscope 604 is an acoustic instrument for auscultation and does not replace clinical judgment or your agency's protocols.
Specifications and Compatibility
| Specification | Detail |
|---|---|
| Manufacturer | American Diagnostic Corporation (ADC) |
| Item Number | 604LB (light blue) |
| Type | Pediatric clinician stethoscope, combination chestpiece |
| Chestpiece Material | Machined surgical stainless steel |
| Diaphragm Diameter | 1 3/8 in |
| Bell Diameter | 1 1/8 in |
| Frequency Design | AFD Technology, tunable by hand pressure |
| Retaining Rims | Non-chill, on both bell and diaphragm |
| Tubing | 22 in PVC, phthalate-free since 2014 |
| Binaurals | Stainless steel, fixed 15 degree angle, molded reinforcing Y-yoke |
| Eartips | Adsoft Plus silicone snap-on, plus two spare pairs |
| Overall Length | 29.5 in |
| Weight | 4.6 oz (131 g) |
| Color Options in the 604 Line | 604BK black, 604G gray, 604LB light blue, 604MCA caribbean, 604MRS raspberry, 604P pink |
| Replacement Parts | 604-01BK diaphragm, 614-03 tubing, 604-04BK chestpiece parts, 603-05BK, 602-078BK1Q eartips, 697BK Scope ID tag |
| Warranty | Lifetime on all parts |
| Latex | Not made with natural rubber latex |
Complete Your Pediatric Assessment Kit
A pediatric stethoscope is one leg of the vitals set. Pair the Adscope 604 with the correctly sized cuff and a fast temperature, all from American Diagnostic Corporation, all carried by Pacific Biomedical.
- Child blood pressure cuff: ADC ADCUFF+ Child Cuff, Green (8451-9CGR-1) (one-piece, bladderless, fits 13 to 19.5 cm arms)
- Temperature: ADC Adtemp 424N Tympanic Ear Thermometer (one-second infrared read, well tolerated by children)
- Second stethoscope for adult patients: ADC Adscope Lite 619 Clinician Stethoscope (lightweight adult chestpiece for a mixed-age response bag)
- Multi-size cuff kit: ADC Multikuf 731 Portable 3-Cuff BP Kit (three cuff sizes in one case)
What's Included
- ADC Adscope 604 pediatric stethoscope in light blue (item 604LB)
- Adsoft Plus silicone snap-on eartips, fitted
- Two spare pairs of Adsoft Plus eartips
- Scope ID identification tag (item 697BK)
- Accessory pouch
- Lifetime warranty on all parts from American Diagnostic Corporation
Who Uses This
Ground EMS & Ambulance
A dedicated pediatric chestpiece in the response bag so a small patient does not get assessed with an adult scope.
Pediatric & Family Practice
Daily well-child and sick-visit auscultation, with non-chill rims that make the exam easier on the patient.
School & Camp Health
Durable stainless construction and a lifetime parts warranty for a scope that lives in a shared health office.
Urgent Care & Hospital
Pediatric-sized listening on mixed-age floors, with replacement parts stocked so the scope stays in service.
Frequently Asked Questions
What size stethoscope do I need for a pediatric patient?
What is the difference between a pediatric and an adult stethoscope?
Do I use the bell or the diaphragm on a child?
What is included with the Adscope 604, and can I get replacement parts?
How long is the Adscope 604 and what does it weigh?
What colors does the Adscope 604 come in?
Is this an authentic ADC product?
How fast does this ship?
How do I place an order, request a quote, or set up an account?
References
- Choosing the right stethoscope. MedicalExpo e-Magazine. Accessed July 24, 2026. https://guide.medicalexpo.com/choosing-the-right-stethoscope/
- Abella M, Formolo J, Penney DG. Comparison of the acoustic properties of six popular stethoscopes. J Acoust Soc Am. 1992;91(4 Pt 1):2224-2228. doi:10.1121/1.403655
- Reilley PK, Johnson SL. The stethoscope: evolution to execution. JEMS. October 31, 2024. Accessed July 24, 2026. https://www.jems.com/ems-operations/the-stethoscope-evolution-to-execution/
Peer-reviewed citations located via PubMed. This information supports product education and does not replace your agency's protocols, medical direction, or the manufacturer's Instructions for Use.
Authorized ADC Distributor (USA). Genuine, factory-fresh product in original manufacturer packaging.
In-stock orders typically ship within one business day. For current lead times, expedited options, or bulk orders, contact us at CustomerService@pacificbiomedical.com or 844.436.3526.
Order the ADC Adscope 604 Pediatric Stethoscope
Genuine American Diagnostic Corporation product. Volume and agency pricing available.
844.436.3526
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ADC Adscope 604 Pediatric Stethoscope, 29.5 in, Light Blue (604LB) ADC-604LB |
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$69.99
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