pH Meter for Boilers and Cooling Towers - HI99141
Probe Condition
An on-screen indicator provides visual confirmation that your probe is working at its best.
Low Battery Indicator
The included batteries provide 1200 hours of continuous use. When the battery level is below 10%, a warning symbol will blink to indicate low battery condition. When low battery power may affect your results, the meter will shut down to avoid erroneous readings caused by low battery level.
Automatic Shut-off
The auto-off feature can be set to shut the meter off at 8 or 60 minutes, or it can be disabled so that the meter continuously stays on. The auto-off feature prolongs battery life for peace-of-mind and energy savings if the meter is accidentally left on.
Built to be Durable
Designed to withstand the knocks, drops, and spills of real life, the new IP67 body ensures top performance in any environment. These meters are protected against dust and water intrusion from any direction.
Portable Design
Made to fit comfortably in your hand for on-the-go testing, the multilevel LCD display provides at-a-glance readings of pH and temperature from any angle and dual button operation streamlines the testing process for any user.
Quick Connect Probe
A Quick Connect DIN connector makes attaching and removing the probe simple and easy. The rubber coating protects the cable and provides a water-tight seal without twisting.
Your measurements require detailed attention; so should your electrode. The HI99141 Boiler and Cooling Tower pH Meter features a replaceable HI729113 probe that has been carefully designed for the pH measurement of boiler water or cooling tower water.
Titanium Body
The titanium body protects your pH electrode from accidental breakage, making it ideal for measurements in plating baths. It also serves as a matching pin to reduce problems caused by electrical currents.
Flat Glass Tip
The recessed flat tip bulb is easy to clean and prevents solids in plating solutions from collecting on the sensor, reducing maintenance.
PTFE Junction
This electrode has a unique clog resistant junction that enhances both probe life and accuracy. Due to its chemical advantages, PTFE is widely used in industrial applications.
HI99141 Models and Compatible Accessories
Old HI99141 (Left)
- Uses the HI72911D pH probe with DIN Connector
- Compatible with the HI710023 Shockproof Boot
New HI9941 (Right)
- Uses the HI729113 pH probe with Quick DIN Connector
- Compatible with the HI710028 Shockproof Boot
*The new Quick DIN probe connection is compatible with the old body design, however, the old DIN probe connections are not compatible with the new body design.
Specifications
| pH Range | -2.00 to 16.00 pH / -2.0 to 16.0 pH |
| pH Resolution | 0.01 pH / 0.1 pH |
| pH Accuracy (@25°C/77°F) | ±0.02 pH / ±0.1 pH |
| pH Calibration | automatic, at one or two points with two sets of standard buffers (pH 4.01 / 7.01 / 10.01 or pH 4.01 / 6.86 / 9.18) |
| mV Range | ±825 mV (pH-mV) |
| mV Resolution | 4 mV |
| mV Accuracy | ±1 mV (pH-mV) |
| Temperature Range | -5.0 to 105.0 °C/23.0 to 221.0 °F |
| Temperature Resolution | 0.1 °C/0.1 °F |
| Temperature Accuracy (@25°C/77°F) | ±0.5 °C up to 60 °C; ±1.0 °C outside ±1.0 °F up to 140 °F; ±2.0 °F outside |
| Temperature Compensation | Automatic -5.0 to 105.0 °C/23.0 to 221.0 °F |
| Power Supply | 1.5V AAA batteries (3 pcs.) |
| Power Consumption | approx. 1400 hours of continuous use |
| Environment | 0 to 50°C (32 to 122°F); RH max 100% |
| Dimensions | s 154 x 63 x 30 mm (6.1 x 2.5 x 1.2”) |
| Weight | 199 g (6.91 oz.) with batteries |
| Ordering Information | Each meter is supplied complete with: • HI729113 preamplified pH probe with built‑in tem‑ perature sensor and matching pin, DIN connector with 1m (3.3’) cable • pH 4.01 & 7.01 Buffer sachet • HI700601 Electrode cleaning solution (2 sachets) • 100 mL beaker (1 pc.) • Alkaline batteries: 1.5V AAA (3 pcs.) • Rugged carrying case • Calibration certificate of meter • Calibration certificate of probe • Instruction manual |
| Recommended Probe | HI729113, preamplified pH probe with built‑in temperature sensor and matching pin (included) |