Testo 205 pH Meter for Meat and Semi-Solid Foods – pH/Temperature Meter, 0…14 pH, ±0.02 pH, Automatic Temperature Compensation, IP65 (0563 2051)

Testo 205 (product code 0563 2051), which is inserted into meat, cheese and semi-solid foods to measure pH and temperature simultaneously, is a one-hand food pH meter (pH/temperature meter). With a combined pH and temperature probe tip set in a rugged plastic housing, it measures in the 0 … 14 pH range with ±0.02 pH accuracy and 0.01 pH resolution, and performs automatic temperature compensation. The gel electrolyte probe tip is maintenance-free and user-replaceable. It is used in slaughterhouses, meat cutting plants, incoming goods inspection, cheese production and bakeries; the 2-line backlit display shows the pH and temperature values together. The housing is IP65 protected.

Important: The pH 4.01 and pH 7.00 buffer solutions used for calibration are not included in the scope of delivery; they must be purchased separately.

Penetration-Type pH Measurement in Meat, Cheese and Semi-Solid Foods

When the probe tip is inserted into the product, the pH and temperature values on the display are updated twice per second. The value can be held manually with the ON/HOLD button; when Auto Hold is on, the instrument automatically freezes the value once it finds a stable pH reading (less than 0.02 pH change in 20 seconds) and can sound an audible signal if desired. If no stable value is found within 300 seconds, the measurement is stopped. Display backlight, audible signal and 10-minute auto-off can be switched on or off in the settings; the temperature unit can be set to °C or °F.

When not in use, the probe tip is kept in the storage cap filled with KCl gel; the tip must be stored in gel so that it is immediately ready for measurement. The storage cap can also be attached to the wall/belt holder supplied with the instrument. The instrument is calibrated at 1 or 2 points using pH 4, 7 or 10 buffer points; at the end of calibration the slope (mV/pH) and offset (mV) values are displayed. According to Regulation EC 1935/2004, the probe tip is suitable for continuous food contact up to 1 cm from the handle.

Technical Specifications (Official Testo Data)

• Brand / Model: Testo 205 pH/temperature meter · product code 0563 2051
• pH (electrode): 0 … 14 pH · accuracy ±0.02 pH (±1 digit) · resolution 0.01 pH
• Temperature (NTC): 0 … +60 °C (briefly +80 °C, max. 5 min) · accuracy ±0.4 °C · resolution 0.1 °C
• Temperature Compensation: automatic
• Probe Tip: combined pH/temperature probe tip, gel electrolyte, replaceable · shaft length 25 mm, shaft diameter 11 mm
• Calibration: 1 or 2 points (pH 4, 7, 10)
• Measuring Rate: 2 measurements per second
• Display: 2-line, backlit LCD
• Power Supply: 4 × LR44 button cells · battery life approx. 80 hours (auto-off 10 min)
• Operating / Storage Temperature: 0 … +50 °C / −20 … +70 °C
• Protection Class: IP65
• Standard: CE 2014/30/EU · probe tip suitable for food contact according to EC 1935/2004
• Housing / Dimensions / Weight: ABS plastic, white · 145 × 38 × 167 mm · 135 g

Scope of Delivery

• Testo 205 pH/temperature meter (probe tip attached)
• Storage cap filled with KCl gel
• Wall/belt holder
• 4 × LR44 button cells
• pH buffer solutions are not included in the scope of delivery

Technician Tips

• Clean the probe tip correctly: before and after each measurement, rinse the tip with low-concentration soapy water and then with tap water below 40 °C, and dab it dry with a paper towel without rubbing. Use dishwashing detergent for grease contamination and pepsin for protein contamination; after cleaning, keep the tip in storage solution for at least 1 hour (preferably 12 hours) and recalibrate.
• Take care of the glass tip: the end of the probe tip is glass; check it for breaks or cracks after each measurement. If it was stored horizontally, gently shake the tip before measuring to remove air bubbles inside.
• Do not touch the bottle during calibration: during calibration the glass tip must not touch the plastic of the buffer bottle; do not leave the instrument inside the bottle, otherwise a calibration deviation of up to ±0.4 pH may occur. The instrument must be recalibrated whenever the probe tip is replaced.
• Monitor the electrode's service life: if at the end of calibration the slope is below 50 mV/pH or the offset is above 60 mV, the pH electrode is worn out and the probe tip must be replaced (Testo spare probe tip 0650 2051).
• Check the gel cap: if excess gel remains on the tip when you remove it from the cap, the gel is used up; replace the storage cap (0554 2051). A tip that has been out of the gel for a long time is made ready for use again by keeping it in gel for about 12 hours.

Technical document: Testo 205 pH meter product brochure (PDF, Turkish)