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Apera PH850-SL Portable Soil pH Meter Kit | Swiss LabSen 553 Spear Electrode, Direct Measurement
Apera PH850-SL Portable Soil pH Meter Kit — Direct Soil Measurement with Swiss LabSen® 553 Spear Electrode
The Apera PH850-SL is a professional-grade portable pH meter purpose-built for direct soil pH measurement — no slurry preparation required. Paired with the Swiss LabSen® 553 PVC 3-in-1 pH/Temperature Spear Electrode , it delivers fast, stable, accurate readings by inserting directly into soil, eliminating the time-consuming slurry method used with standard pH meters. Converts between portable field meter and benchtop unit via its integrated foldable stand.
Key Features
Swiss LabSen® 553 Spear Electrode — Designed exclusively for direct soil pH measurement; PVC housing with unique blue spear sensor tip for easy insertion into soil, coco coir, and grow media
S-Type Spear Glass Membrane — Low resistance + high firmness delivers fully stabilized readings in 15–30 seconds ; 10× stronger than traditional glass membranes — highly resistant to impact and accidental breakage during soil insertion
Open & Ceramic Double-Junction with Polymer Electrolyte — Ensures full contact with soil samples while minimizing junction clogs; no electrolyte refilling required
Long-Life Reference System — Glass tube + AgCl + reference silver wire with cotton-stuffed top end prevents AgCl–electrolyte reaction during temperature changes; improves reference stability and extends electrode service life
No Slurry Required — Insert directly into moist soil for in-situ pH readings; faster and more representative than slurry-based methods
1–3 Point Auto Calibration — Auto-recognizes pH 1.68, 4.00, 7.00, 10.01, 12.45 (USA & NIST); electrode slope display for probe health monitoring
ATC 0–100°C (Auto or Manual) — Full temperature compensation for field and greenhouse conditions
IP57 Waterproof + Silicone Grip Sleeve — Dustproof and impact-resistant; built for outdoor field and grow-room use
Portable + Benchtop Dual Mode — Foldable stand converts the meter to a benchtop unit; powered by 3× AA batteries or USB DC5V
Large LCD with Stability Icon — Smiley face stable reading indicator; simultaneous pH + temperature display; calibration completion icons
Self-Diagnosis — Out-of-range value and electrode invalidation alerts
Technical Specifications
Meter Specs
pH
Range
0 – 14 pH
Resolution
0.01 / 0.1 pH
Accuracy
±0.01 pH ± 1 digit
ATC
0–100°C (Auto or Manual)
mV
Range
±1000 mV
Resolution
1 mV
Accuracy
±0.2% F.S. ± 1 digit
Temperature
Range
0–100°C (32–212°F)
Resolution
0.1°C
Accuracy
±0.5°C ± 1 digit
Calibration
Auto 1–3 points; USA & NIST buffer recognition
Power
3× AA batteries or DC5V (USB)
Waterproof Rating
IP57 (Dustproof & Waterproof)
Dimensions & Weight
Meter: 88×170×33 mm / 313 g | Case: 360×270×76 mm / 1.6 kg
LabSen 553 Electrode Specs
Housing Material
PVC
Glass Membrane Shape
Spear (S-type)
Junction
Open ceramic + single-pore double-junction
Reference Electrode
Long-life (AgCl + glass tube)
Electrolyte
Polymer (no refill required)
Temperature Sensor
Yes (integrated)
pH Range
0 – 14 pH
Temperature Range
0–80°C (32–176°F)
Connector
BNC and RCA
Applications
Direct soil pH testing, coco coir, rockwool, perlite, greenhouse growing, cannabis cultivation, outdoor agriculture, hydroponics grow media, turf management, and environmental soil monitoring.
