Product Description

Hanna HI-991401 GroChek pH and Temperature Monitor

This waterproof indicator has been specially designed to meet the grower’s need for equipment suited to the aggressive environments of agricultural and hydroponics applications. Measurements are highly accurate and the meter can be calibrated at one or two points.

Low battery and battery changes are no longer a problem thanks to a 12 Vdc power supply included with the meter.

The HI 1293D pH electrode & the temperature probe have been molded with pipe thread (1/2’’ NPT), which allows the user to attach them to an in-line system. Moreover, the pH electrode has been specially designed to guarantee greater clogging resistance in fertilizer solutions with high concentrations of phosphate and nitrate.

Features at a Glance

Waterproof housing

The HI991401’s waterproof housing has been designed to meet the grower’s need for a monitor that is well-suited to the environments found in agricultural and hydroponics applications

HI1293 pH electrode

HI1293 pH electrode has been specially designed to address the needs of growers. Its design guarantees greater clogging resistance in fertilizer solutions with high concentrations of nutrients to ensure longer electrode life.

Auto Calibration

Measurements are highly accurate and can be verified with one-or two-point calibrations.

Power Supply

With a 12 VDC power supply included with the meter, low battery failures are never an issue.

Specifications Hanna HI-991401 GroChek pH and Temperature Monitor


SKU	HI991401-02
Product Name	GroChek pH and Temperature Monitor – HI991401
Quote Required	Yes
pH Range	0.0 to 14.0 pH
pH Resolution	0.1 pH
pH Accuracy	±0.1 pH
pH Calibration	automatic, one or two points with two sets of memorized buffers (pH 4.01/ 7.01/10.01 or pH 4.01/6.86/9.18)
pH Temperature Compensation	automată (0.0 la 60.0ºC/ 32.0 la 140.0°)
EC Range	0.00 la 10.00 mS/cm
EC Resolution	0.01 mS/cm
EC Accuracy	±0.1mS/cm (0.00 la 5.00mS/cm); ±0.2mS/cm (5.00 la 10.00mS/cm)
EC Calibration	1 punct 1.41 mS/cm sau 5.00 mS/cm cu recunoaștere automată a soluției tampon; un punct cu soluția pentru calibrare rapidă
TDS Range	0 la 5000 ppm (factor de conversie TDS 0.5); 0 la 7000 ppm (factor de conversie TDS 0.7)
TDS Resolution	10 ppm
TDS Accuracy	±2% f.s.
EC/TDS Temperature Compensation	automată
Temperature Correction Coefficient	β la 1.9%/°C
EC to TDS Conversion Factor	factor de conversie TDS 0.5 (500 CF); factor de conversie TDS 0.7 (700 CF)
Temperature Range	0.0 to 60.0°C (32.0 to 140.0°F)
Temperature Resolution	0.1°C (0.1°F)
Temperature Accuracy	±0.5°C (±1°F)
Alarm Relay Set Point	nivel scăzut și ridicat, opțiune de activare sau dezactivare pentru toti parametrii
pH Electrode	HI1293 PEI body, pre-amplified pH electrode with 1/2” NPT pipe thread, DIN connector and 2 m (6.6’) cable (included)
Multi-parameter Probe	HI1285-8 pH/EC/TDS/temperatură, corp din polipropilen, amplificare, senzor de temperatură încorporat, mufă DIN, cablu 2 m.
Temperature Probe	HI1294 temperature probe with 1.2” NPT pipe thread and 2 m (6.6’) cable (fixed)
Logging Type	memorare automată pentru ultimele 30 zile la un interval de 15 minute
Connectivity	USB
GLP	ultimele 5 calibrări pentru pH și EC
Display	128 x 64 pixel B/W LCD cu lumină verde de fundal
Power Supply	12VDC adapter (included)
Environment	0 to 50°C (32 to 122°F); RH max 95%
IP Rating	IP65
Dimensions	160 x 105 x 31 mm (6.2 x 4.1 x 1.2”)
Weight	190 g (6.7 oz.) – meter only
Ordering Information	HI991401-02 (pH Gro’Chek) (230V) is supplied with HI1293D pH electrode, HI1294 temperature probe (fixed), HI70004 pH 4.01 buffer solution sachet, HI70007 pH 7.01 buffer solution sachet, 12 VDC power adapter and instructions.