Wireless 24/7 real-time concrete temperature monitoring
Hanna pHep pH testers for Application-Based Model Selection
These products are often used for routine testing, inspection, and quality-control workflows, where the right choice often depends on differences in configuration, range, portability, and application fit.
How do you use Hanna Phep?
This compact pH testing device is utilized by millions globally for measuring pH in labs and industrial settings, as well as in agriculture, aquaculture, food production and quality assessment, swimming facilities, and the printing sector.
A universal pH meter anyone can use
HI98127 (pHep®4) and HI98128 (pHep®5) are waterproof pH and temperature meters. The housing has been completely sealed against humidity and designed to float. All pH readings are automatically temperature compensated (ATC), and temperature values can be displayed in °C or °F units.
The pHep’s ease of use in combination with its affordability made it possible for non-technical and technical personnel alike to measure pH on the spot, accurately and inexpensively, throughout a variety of industries.
The pHep4 and pHep5 include features such as a dual-level LCD, battery level indicator, replaceable pH electrode cartridge, stability indicator, automatic shut-off and automatic calibration all in a floating, waterproof casing.
The pHep4 and pHep5 use the exclusive cartridge pH electrode. Electrode replacement with the stainless steel round connector means there are no pins to bend or break during replacement.
The pHep’s replaceable electrode has a pull-out cloth junction. When the cloth junction becomes dirty from routine testing, simply pull out 3 mm (1/8”) to rejuvenate the electrode.
The pHep4 and pHep5’s exposed temperature sensor provides fast response time, and its proximity to the pH electrode guarantees much more accurate temperature-compensated readings.
Related Products
For complementary Hanna testing solutions, explore the Pocket pH Meter for Beer for rapid beverage testing, the Bread and Dough pH Tester for baking applications, or the Food pH Testers for general food quality monitoring.
Product Q&A
What industries are the Hanna pHep testers used in?
They are widely used in laboratories, industrial processes, agriculture, aquaculture, food production and quality assessment, swimming pools, and the printing industry.
What is unique about the Hanna pHep electrode?
The pHep meters use a replaceable cartridge electrode with a stainless steel round connector, making replacement simple without bending or breaking pins. The cloth junction can be pulled out slightly to rejuvenate the electrode.
Are the Hanna pHep meters waterproof?
Yes, both the HI98127 and HI98128 are fully waterproof, designed to float, and completely sealed against humidity.
Do Hanna pHep testers provide temperature-compensated readings?
Yes, all pH readings are automatically temperature compensated (ATC), and the temperature can be displayed in °C or °F.
What additional features do these testers have?
They include a dual-level LCD, battery indicator, stability indicator, automatic shut-off, automatic calibration, and a floating waterproof casing.
HANNA pH TESTERS - HOW TO USE
Setup mode allows the selection of temperature unit and pH buffer set. To enter the Setup mode, press the /MODE button until “CAL” on the secondary display is replaced by “TEMP” and the current temperature unit (E.g. “TEMP °C”). Then:
- °C / °F selection: Use the SET/HOLD button. After the temperature unit has been selected, press the /MODE button to enter the buffer set selection mode; press the /MODE button twice to return to the normal measuring mode.
- To change the calibration buffer set: After setting the temperature unit, the meter will show the current buffer set: “pH 7.01 BUFF” (for pH 4.01 / 7.01 / 10.01) or “pH 6.86 BUFF” (for NIST 4.01 / 6.86 / 9.18). Change the set with the SET/HOLD button, then press /MODE to return to normal measuring mode.
Learn more in the Instruction Manual / Quick Start Guide
| Number of Channels | 1 Ch (Temperature) |
| Unit of Measurement | °C, °F |
| Measurement Range | – 40 to 80 °C |
| Sensor | Internal Temp. Sensor |
| Thermal Time Constant | Approx. 15 min. L Type: Approx. 25 min. |
| Response Time (90%) | Approx. 35 min. L Type: Approx. 47 min. |
| Measurement Accuracy | Avg. ±0.5°C |
| Measurement Display Resolution | 0.1°C |
| Recording Intervals | Select from 15 choices: 1, 2, 5, 10, 15, 20, 30 sec. / 1, 2, 5, 10, 15, 20, 30, 60 min. |
| Logging Capacity | 16,000 readings |
| Recording Mode | Endless: Upon reaching logging capacity, the oldest data is overwritten and recording continues. One-time: Upon reaching logging capacity, recording will automatically stop. * When using RTR-500BW, RTR-500BM, RTR-500NW/AW, or RTR-500MBS-A as a Base Unit, only “Endless” can be selected. |
| LCD Display Items | Current Readings, Recording Settings, Battery Life Warning, Over Measurement Range Warning, Amount of Recorded Data, Unit of Measurement |
| Power | Lithium Battery (LS14250 (SAFT)) x 1 for L type: Large Capacity Battery Adaptor Kit (RTR-500B1 / sold separately) External Power Adaptor Kit (RTR-500A1 / sold separately) |
| Battery Life | About 10 months L Type: About 4 years |
| Communication Interfaces | Short Range Radio Communication Frequency Range: 902 to 928MHz RF Power: 7mW Transmission Range: Approx. 150 meters (500 ft) if direct and unobstructed Bluetooth 4.2 (Bluetooth Low Energy) Optical Communication |
| Water Resistance | IP67: Immersion proof |
| Dimensions | H 62mm x W 47mm x D 19mm L Type: H 62mm x W 47mm x D 46.5mm Excluding protrusions Antenna length: 24mm |
| Weight | Approx. 50g L Type: approx. 65g |
| Operating Environment | -40 to 80°C -30 to 80°C during wireless communication |
| Accessories | Lithium Battery (LS14250 or Large Capacity Battery Kit RTR-500B1), Strap (not included with L Type models), Manual Set (warranty included) |
| Compatible Base Units | RTR-500BC, RTR-500BW, RTR-500BM RTR-500DC, RTR-500MBS-A, RTR-500NW/AW RTR-500 |
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