24004 isfet pH meter

ISFET pH Meters

Model 24004 is a low-cost non-glass Pocket ISFET (Ion-Sensitive Field Effect Transistor) pH Meter featuring a virtually unbreakable silicon chip sensor that gives stable readings in seconds. The meter is rated IP67 waterproof and is ideal in applications involving food and beverage, medical, pharmaceutical, agriculture, and environmental studies. The meter is capable of reading a single drop sample and stores dry requiring no storage solution. The meter's easy to read LCD displays both pH and temperature and its reference electrode is replaceable further extending the product's longevity.

24309 handheld ph meter

Model 24309  This rugged, waterproof pH meter is armored in a chemical resistant enclosure engineered to withstand rough handling while accurately measuring pH, mV and temperature with readings displayed on a large LCD. Stainless steel probes with ISFET sensors are ideal for harsh environments, instead of glass electrodes which tend to break easily. This meter is used for testing pH in food and beverage processing plants, environmental field studies, agricultural, petrochemical, and industrial applications, as well as academic teaching laboratories.

Model 24004

Pocket ISFET pH Meter

24004 Pocket ISFET pH meter


  • Low cost, non-glass ISFET ph system
  • Instant response time
  • Stores dry, requires no fill solution
  • Replaceable reference electrode (PN 24005) 
  • Auto Shut off
  • Able to read a single drop of buffer or sample
  • Quick pH readings of foods, soils, wastewater, pools, and other samples
Model 24004 Pocket ISFET pH Meter
Sensor Ion Sensitive Field Effect Transistor (ISFET) Replaceable reference electrode
Calibration pH 7.0 buffer, automatic one point calibration
Display LCD with pH and Temperature
Automatic Buffer Recognition pH 7.0
pH 6.86
pH Suggested Range 5.0 to 9.0 pH
Range: 2.0 to 12.0 pH
Resolution: 0.1 pH
Repeatability: ± 0.1pH
Input Accuracy: ≤0.1pH
Temperature Operating Temperature Range: 41°F - 104°F (5°C - 40°C)
Resolution: 0.1°C or 0.1°F
Accuracy: ±1.0°F / 0.5°C
Battery Operation Two 3v (Lithium dry cell CR2032) included
Battery Life Approx. 200 hours of continuous use, warning with 10 hour advance low battery and automatic power off
Dimensions 6 1/8"L x 1.1/4"W x 3/4"H (155mmL x 33mmW x 20mmH)
Weight 0.17 lbs (77g) meter only
IP Rating IP67
To download a pdf version of this specification sheet please click here Pocket ISFET pH Meter

Model 24309

Waterproof pH Meter

24309 handheld pH meter
Two types of stainless steel probes are available with waterproof connectors. The Standard Probe is for general purposes and has a blunt tip which is ideal for most applications. The Heavy Duty Piercing Probe has a sharp tip with a rugged handle designed specifically for piercing applications, such as meat or cheese.
  • Stainless steel probes with ISFET sensors (order separately)
  • Waterproof, chemical resistant, dust resistant, floating enclosure
  • 0.1 or 0.01 pH resolution
  • Calibrate up to five pH points
  • Automatic or manual temperature compensation
24309 24302 24303
pH Meter Standard Probe (round tip) Heavy Duty Piercing Probe
Model 24309 Waterproof pH Meter
DeltaTrak manufactures products under an ISO 9001:2008 registered quality management system
Description GLP (Good Laboratory Practice) compliant, waterproof pH meter. Measures pH, mV, and temperature
Probe Types Non-glass pH probes w/BNC connector. Will accept glass probes w/BNC connector
Range pH: 0.00 to 14.00±1999 mVTemp: 0 to +100°C (Display °C or °F)SE: Autoranging 0.0 ppm to 1999ppt
Resolution pH: 0.010.1/1 mVTemp: 0.1 °C or 0.1°F0.1ppm, 0.1ppt
Accuracy pH: ± 0.01±0.1 mVTemp: ±0.5 °Cprobe dependent
Display Large LCD with LED backlight
Temperature Compensation Manual or Automatic 0 to +100 °C
Calibration Up to 5 points
Buffer Recognition Automatic at 1.68, 4.01, 6.86, 7.00, 9.18, 10.01, 12.45
Power 4-AA batteries (included)
Battery Life Up to 200 hours continuous, 10 hour advance low battery warning
Dimensions 3.5 in W x 8 in H x 2 in D (90 mm x 204 mm x 50 mm)
Standard Probe Dimensions 0.33 in Dia x 5.51in L (8.3 mm Dia x 140 mm L)
Heavy Duty Probe Dimensions 0.19 in Dia x 3.54 in L (4.8 mm Dia x 90 mm L)
Weight 3.0 lbs (1.3 Kg)
IP Rating IP67
To download a pdf version of this specification sheet please click here Model 24300 Hand Held pH Meter