Banner BT26S Diffuse Fiber Optic Probe

(Bannière BT26S, Numéro de pièce.: 17285)

Type de produit: Bifurcated glass fiber, diffuse fiber optic probe (fiber amplifier not included; must be used with Banner fiber amplifier)

Définition du modèle

BT: Bifurcated Threaded

26: Longueur 72 pouce (1.829 m)

S: Stainless steel monocoil armored sheath

Spécifications de base

Caractéristiques structurelles

1. Bifurcated design: One fiber for light emission, one for light reception. Dual fibers integrated inside one armored cable, Y-split tail to connect to fiber amplifier.
2. Brass threaded sensing tip: Easy threaded mounting, suitable for confined spaces.
3. Stainless steel corrugated armor: Crush-resistant, abrasion-resistant, works in harsh environments with high temperature, oil mist and dust.
4. High-temperature glass fiber: Different from plastic fiber; suitable for workpiece detection in ovens, équipement de traitement thermique.

Applications typiques

Presence detection of high-temperature workpieces

Liquid level and leakage detection

Small target detection for metallic and non-metallic parts

Compact installation space and heavy vibration equipment

Fours, die casting and heat treatment machinery

Référence du modèle de remplacement

BT26S is discontinued. Alternative models from the same series:

1. BT23S: Straight tip with identical thread specification, longueur 36 pouce (0.914 m), short version;
2. BAT26S: 72 pouce, 5/16-24 fil, 90° right-angle beam exit (lateral light emission);
3. For longer or shorter cable length, refer to BT13S, BAT23S.

Installation & Directives d'entretien

1. Thread mounting: Tighten with 5/16-24 nut. Do not over-torque the fiber root to avoid breakage of glass fiber.
2. Bending control: Cable routing with bend radius ≥25 mm; sharp bending is prohibited.
3. End face maintenance: Oil and dust contamination on brass tip will attenuate optical signal. Clean fiber end face with anhydrous ethanol.
4. Selection reminder: The fiber probe cannot output switching signal independently; fiber amplifier is required for PLC connection.

Référence du code SH

8544700000 (Optical fiber cables)

Sensing Distance of BT26S Diffuse Probe

Remarque importante: BT26S is a passive fiber probe with no fixed detection range. Sensing distance depends on paired fiber amplifier (DF-G1 / DF-G2 / DF-G3), and is heavily affected by reflectivity of target object.

Typical Test Data (Paired with Banner DF-G3 high-power amplifier, white high-reflectivity target)

Reliable operating range: 0～150 mm

Maximum trigger distance: environ. 200 mm

For low-reflectivity black workpiece, effective distance drops significantly, typically 0～50 mm.

Caractéristiques clés

1. No built-in lens; fiber bundle diameter 3.2 mm with relatively large beam divergence. The farther the distance, the larger the spot and faster optical attenuation.
2. Banner official datasheet does not specify fixed rated range; only Excess Gain curve is provided. Model selection must refer to excess gain curve instead of fixed range value.
3. Recommended operating window: 0~100mm. Sufficient excess gain within this range, retains margin under dusty and oily conditions. Margin is very limited beyond 150 mm; signal loss may occur with minor contamination.

Factors Affecting Sensing Distance

Amplifier model: DF-G3 DF-G2 DF-G1 (DF-G3 has highest optical power and longest range)

Target color / réflectivité: Livre blanc / aluminum plate grey plastic black rubber

Contamination on probe end face, mounting angle and background reflection interference

High-temperature operation: Optical loss increases slightly at 249℃, which shortens effective sensing distance

Recommandation de sélection

Keep detection distance ≤100mm for high-temperature applications; for black workpiece, control within ≤40~50mm.

If longer diffuse sensing range is required, select BT series fiber with focusing lens. BT26S straight tip is optimized for high temperature rather than long-distance detection.

Material Breakdown of Banner BT26S (17285)

1. Fiber bundle: Optical glass fiber (F2 core, EN1 cladding), multi-strand glass fiber forming bifurcated diffuse fiber bundle.
2. Threaded sensing tip: Laiton, 5/16-24 UNF external thread, high temperature resistant and convenient for mechanical locking.
3. Cable armored sheath: 302 stainless steel single-coil metal hose (Banner SteelSkin armor), crush-proof, abrasion-resistant, oil and dust resistant.
4. Y-bifurcation connector (black plastic tail housing): Molded thermoplastic engineering plastic.
5. Fiber end bonding: Optical grade epoxy resin (version standard; M900 suffix model adopts fused joint without epoxy).

Material Performance Highlights

Fibre de verre: Max temperature resistance 249℃, transmits visible and infrared light, ideal for high-temperature applications, superior to plastic fiber.

Brass tip: Good machinability and high thread strength; evaluate compatibility for strong acid and alkali corrosive environments.

302 stainless steel armor: Anti-cut and anti-crush, maintains flexibility to protect internal glass fiber from fracture.

IP Rating Statement for Banner BT26S

Official datasheet does not specify standard IP protection rating. BT26S is a passive fiber assembly without electronic circuitry. IP rating standard applies to sensors with electronic housing, so no IP certification is provided by manufacturer.

Environmental Resistance of Each Component

1. Brass sensing tip: Resists dust, oil mist and splash water; not suitable for high-pressure wash or long-term immersion. Water or oil contamination on fiber end face directly causes optical signal attenuation.
2. 302 stainless steel monocoil armor: Strong mechanical protection against compression and abrasion. The gaps between metal coils allow ingress of water and dust, not hermetically sealed waterproof tube.
3. Y-shaped plastic bifurcation base: Only protects against common dust and splash water; immersion is prohibited.

Distinction importante (Common Confusion)

BT26S (fiber probe): No IP rating

Matching Banner fiber amplifier (DF-G series): Amplifier housing is IP67 rated; only the electronic amplifier has IP protection grade.

Application Selection Suggestion

✅ Convient: Sec / brouillard d'huile, environnement poussiéreux, occasional splash water, high-temperature equipment (≤249℃)

❌ Not suitable: High-pressure spray cleaning, continuous water immersion, strong corrosion soaking scenarios