works well
Picked up a used Twister T6 for $400 and replaced the gear box for $100 and now its like new again.
HM Digital Product Documents
The HM-500 is the most versatile continuous monitor indicating EC/TDS, pH, and Temp providing accurate and stable readings.
With its rechargeable battery this unit is portable or can be wall mounted. To make it even more user friendly, it comes equipped with a touch screen, high and low alarm set points, and recorded readings. It is ideal for hydroponics and other applications such as labs, pools, aquariums, etc. Tests pH at a range of 0 pH-14 pH, temperatures from 30F-176F, TDS from 0-9999 ppm and EC from 0-9999 µS. Stores up to 20 measurement readings, so you can monitor changes over time. LCD touch-type screen with auto backlighting. Includes a rechargeable lithium ion battery. Features an adjustable alarm that has a high and low set point. Automatically turns off after 5 minutes.
HM Digital HydroMaster HM-500 Features:
- Continuous pH/EC/TDS/Temp Monitor
- Rechargeable battery
- RF Resistant
- Portable/Wall Mount/Benchtop
- Data Storage: Up to 20 measurement readings
- Auto Shut-Off: After 5 minutes
- Alarm: Adjustable High & Low Set Point and on/off
- Display: LCD Touch-Type Screen with Auto Back lighting
- Probe: ABS with Platinum electrodes for EC / Single Junction pH Sensor
- Three Year Warranty
HM Digital HydroMaster HM-500 Included Items:
- Wall Mountable Bracket
- USB Cable
- 2 Flotation Disks
- 1 EC/TDS Conductivity Sensor
- 1 pH Sensor
- 1 packet of pH 4
- 1 packet of pH 7
- Storage Solution
- 1000 ppm Calibration Solution
HM Digital HydroMaster HM-500 Specs:
| pH Range: | pH: 0.00 – 14.00 pH |
|---|---|
| Temperature Range: | 0.0 – 80.0 °C / 32.0 – 176 °F |
| TDS Range: | 0 – 9999 ppm / 0 – 10.00 ppt |
| EC Range: | 0 – 9999 µS / 0 – 20.00 mS |
| pH Resolution: | 0.1 pH |
| Temp Resolution: | 0.1°C / 0.1 °F |
| TDS Resolution: | ppm: 0.1ppm (0 – 99.9ppm) / 1 ppm (100-999ppm) / 10ppm (1000-9990 ppm) ppt: 0.01 ppt (0.01 – 10.00 ppt) |
| EC Resolution: | µS: 0.1 µS (0 – 99.9 µS) / 1 uS (100 – 999 µS) / 10µS (1000-9990 µS) mS: 0.01 mS (0.01 – 20.00 mS) |
| ATC Resolution: | Yes |
| pH Accuracy: | ± 0.1 pH |
|---|---|
| Temp Accuracy: | ± 1 °C / ˚F |
| TDS Accuracy: | ± 2 % |
| EC Accuracy: | ± 2 % |
| Power Source: | AC 110 V – 220V / Rechargeable Lithium Ion Battery |
| Function Environment: | 0 – 50°C (0-122°C) / RH 80 % (EC Probe: 0 – 80°C) |
| Sensor Cable: | 24-inch shielded Coaxial Cable |
| Dimensions: | About 8 x 4 x 1.5 inches |
| Weight: | 15.2 ounces for body / 5 ounces for two probes (without case) |
| Brand | HM Digital |
|---|---|
| SKU | GG-660009 |
| Weight (lb.) | 0.9500 |
| Height (in.) | |
| Prop 65 | false |
| Lead Time | 2-3 |
| Length (in.) | |
| Width (in.) | |
| Warranty | 3 Years |
| Hazardous Material | false |
| UPC | 891144000311 |
| ETL Listed | No |
| UL Listed | No |