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Pre-pressurized for highly viscous samples.
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APERA INSTRUMENTS / LABSEN 853-S / AI3165
LabSen 853-S is a non-refillable, pre-pressurized pH/temperature electrode for high-accuracy measurement of highly viscous samples such as coatings, syrups, resin and glue. Its pre-pressurized reference keeps electrolyte flowing outward through the junction, and a low-impedance S membrane gives fast response.
Listed operating envelope: pH 0–13 and electrode/sample temperature 0–100°C, retaining the narrower limits on Apera’s current US 853-S product page. Catalog AI3165. Apera warrants LabSen electrodes for six months from delivery.
Only published products are linked. Other cards provide model-comparison information and do not indicate current storefront availability.
Start with what makes your sample difficult. Published families link to their product pages. Other models are shown for comparison only; confirm the exact connector and host before choosing.
AI3141 / AI3153
Proteins, dairy, biotech
Protelyte electrolyte and triple ceramic junction.
AI3109 / AI3177 / AI3239
Strong acids, HF
HF-resistant glass; spot measurements below 0.1 mol/L HF.
AI3145 / AI3179 / AI3237
pH 12–14, salinity >0.5%
HA glass minimizes alkaline error; silver ion trap.
AI3110
Skincare, cosmetics, coatings
Conical membrane with Protelyte and triple ceramic junction.
AI3165
Coatings, syrups, resin, glue
Pre-pressurized gel KCl with low-impedance S membrane.
AI3168 / AI3180 / AI3243
Viscous, alkaline or salty
Pre-pressurized gel KCl and HA glass; BNC, BNC/RCA or 8-pin.
AI3167 / AI3176 / AI3241
Hot, caustic, electroplating
PHY glass and PTFE ring junction, rated to 130°C.
AI3147
Organic solvents
PHY glass, double junction with 1M LiCl outer bridge.
It carries a built-in 30 kΩ NTC temperature sensor on an RCA plug for automatic temperature compensation on Apera meters with BNC and RCA inputs, such as the PH700, PH850, PH8500, PH820, PH910 and PH9500. Apera notes they may not work with other brands’ meters because the thermistor might not be compatible.
Smooth electrolyte flow in viscous samples, so thick sample cannot work its way into the junction.
Fast response while staying impact resistant.
Stable reference potential and long service life, with a built-in sensor for ATC.
Operating envelope: pH 0–13 and electrode/sample temperature 0–100°C, retaining the narrower limits on Apera’s current US 853-S product page. Construction: body lead-free glass; glass membrane S-type, hemispherical; junction ceramic; reference electrolyte pre-pressurized gel KCl.
The full specification table is in the Product Specifications tab. The linked manual lists wider pH/low-temperature endpoints; this listing deliberately retains the narrower current US product-page pH 0–13 and 0–100°C limits. Temperature figures are electrode/sample ratings, not a complete-system rating. Use a meter and temperature-compensation method rated for the actual sample temperature; keep the meter body, cable connection and adapter within their own confirmed limits. Connector fit alone does not establish temperature or ATC compatibility.
Keep the tip in its cap with 3M KCl storage solution whenever it is not measuring.
Never store a pH electrode in pure, deionized or distilled water.
It is sealed and needs no refilling.
Apera’s manual advises avoiding strong acid and strong alkali solutions and dehydrating media such as absolute ethanol or concentrated sulfuric acid; if exposure is unavoidable, keep immersion short and clean the electrode carefully afterward.
Rinse with distilled or deionized water between samples. For stubborn deposits, use Apera electrode cleaning solution, then recondition and recalibrate.
Calibrate with fresh pH 7.00, pH 4.00 and pH 10.01 buffers.
LabSen 853-S is a non-refillable, pre-pressurized pH/temperature electrode for high-accuracy measurement of highly viscous samples such as coatings, syrups, resin and glue.
The pH signal uses BNC, but the built-in 30 kΩ NTC temperature sensor is not universally compatible. Apera lists meters with matching BNC/RCA inputs; verify the meter’s thermistor support and temperature range before relying on ATC.
No; it is sealed and needs no refilling.
Keep the tip in its cap with 3M KCl storage solution whenever it is not measuring. Never use pure, deionized or distilled water.
Apera warrants LabSen electrodes against defects in material and workmanship for six months from delivery. Accidental damage, improper use and normal wear are excluded.
Apera’s exact 853-S manual lists pH 0–14 and −5–100°C, while its current US product page lists pH 0–13 and 0–100°C. This listing deliberately uses the narrower current-page limits. The electrode temperature rating does not extend your meter’s own temperature or ATC limits.
No. The 853-S uses a low-impedance S-type membrane for viscous samples; 853-H uses HA glass for alkaline applications. The 853-S manual advises avoiding strong acids, strong alkalis and dehydrating media such as absolute ethanol or concentrated sulfuric acid. Do not treat the similar model names as interchangeable chemical-use ratings.
Rinse with distilled or deionized water before and after measurements. For stubborn contamination, follow the 853-S manual’s cleaning procedure, then recondition in 3M KCl and recalibrate. Cleaning water is not storage solution; keep the sealed electrode in 3M KCl when not measuring and do not try to refill it.
Check the connector and catalog number (AI3165) against your meter and samples, then return to the live price and ordering controls.
Temperature figures are electrode/sample ratings, not a complete-system rating. Use a meter and temperature-compensation method rated for the actual sample temperature; keep the meter body, cable connection and adapter within their own confirmed limits. Connector fit alone does not establish temperature or ATC compatibility.
APERA INSTRUMENTS, LLC warrants LabSen electrodes to be free from defects in material and workmanship for SIX MONTHS from the delivery.
This limited warranty does NOT cover accidental damage, improper use, normal wear and tear, transportation, storage, failure to follow the product instructions, unauthorized maintenance, modification or repair, or external causes beyond Apera's reasonable control.
Exact LabSen 853-S manual; each card opens a PDF. Its pH 0–14 and −5–100°C table is wider than the current US product page. This listing retains the narrower current-page pH 0–13 and 0–100°C limits; no broader operating envelope is claimed. The BNC/RCA connection and 30 kΩ NTC sensor are confirmed by this exact manual.
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