The dV-2 Series incorporates many of KELLER's latest developments in electronics to produce a simple low cost digital pressure gauge that is packed full of features normally found only on expensive instruments.
The dV-2 can be set up to perform various measuring functions via two front panel operating buttons. Gauges are available in three accuracy classes: • 0.5 %FS (Standard, Yellow) / • 0.2 %FS (Silver) / • 0.1 %FS (Gold).
The internal microprocessor has great flexibility. It can be programmed during manufacture to perform numerous functions, and this enables KELLER to offer customized products for specific applications where larger quantities are involved.
The dV-2 Cool was designed for monitoring tasks at refrigerant filling stations. Vapor pressure/temperature graphs for 5 refrigerant liquids are saved in the unit and can be selected by pressing a button.
The LCD switches from temperature to pressure at the touch of a button, with the display offering a choice of bar / °C or PSI / °F.
The high resolution display means that dV-2 Cool can also be used for measuring leaks in vacuums. Refrigerant:
The following refrigerants are stored in the instruments: R22, R12, R507, R404a, R134a. Optional: other refrigerants.
ECO 2 is a compact and economical digital pressure measuring instrument providing medium accuracy at high resolution and repeatability. The piezoresistive pressure transducer as the heart of the instrument has gone through extensive pressure- and temperature tests.
The pressure is measured twice per second and displayed. The top display indicates the actual pressure, the bottom display shows the Max.- ECO 2 has two operating keys. The left key turns on the instrument and is used to select the functions and the pressure units. The right key executes the selected function or unit. The right key is also used to switch between the Max.- and Min.-value.
ECO 2 has 7/16” UNF male thread and is delivered complete with an O-ring seal swivel fitting which allows ECO 2 to be rotated 360ظُ. Only minimal torque is needed to seal up to 300 bar. Process pressure connection is G 1/4” male.
LEO 1 is a micro-processor controlled, accurate and versatile digital pressure measuring instrument with integrated fast peak, max. and min. function.
The instrument is used in two modes:
Mano-Mode: The pressure is measured twice per second and displayed. The top display indicates the actual pressure; the bottom display shows the MAX. or MIN. pressure since the last RESET.
Peak-Mode: The pressure is measured 5'000 times per second and is brought to the display twice per second. The top display shows the actual pressure, the bottom display the peak (MAX.) or trough pressure (MIN.).
Also available as intrinsically safe version (LEO 1 Ei).
LEO 2 is a compact, micro-processor (µP) controlled, highly accurate and versatile pressure measuring instrument with digital indication. The piezoresistive pressure transducer as the heart of the instrument has gone through extensive pressure and temperature tests. Its characteristics are stored in the instruments internal EEPROM. The µP of the LEO 2 reads the characteristic values and calculates therefrom the pressure to an accuracy of < 0.1 %FS at room temperature.
The pressure is measured twice per second and displayed. The top display indicates the actual pressure; the bottom display shows the Max. or Min. pressure since the last RESET.
Also available as intrinsically safe version (LEO 2 Ei).
LEO 3 is a micro-processor based transmitter with digital double-display for pressure (top display) and for the output signal (bottom display). The display is powered from the 4...20 mA current loop.
LEX 1 is a micro-processor controlled, accurate and versatile digital pressure measuring instrument with integrated Max./Min. function for calibration and testing purposes.
The pressure is measured twice per second and displayed. The top display indicates the actual pressure, the bottom display shows the Max. or Min. pressure since the last RESET.
LEX 1 has two operating keys. The left key is to turn the instrument on, to select the functions and the pressure units. The right key executes the selected function resp. unit or serves to display the Max. and Min. value.
Also available as intrinsically safe version (LEX 1 Ei).
LEO Record is an autonomous battery powered instrument with digital display designed to record pressure and temperature over long periods. Both the piezoresistive LEO Record as well as the capacitive LEO Record (ideal for low pressure ranges) offer the following advantages:
The LEO 5 combines the notable features of Keller’s successful LEO-Record and LEX 1 digital pressure gauges, featuring an IP66-rated stainless steel enclosure. This robust housing combines contemporary microcontroller-based electronics and capacitive-touch controls, operated through the environmentally-sealed safety glass front panel. The large backlit LCD display ensures readability in any lighting conditions.
Two selectable measurement modes, standard and peak, are included to ensure maximum versatility. In standard mode, high-resolution pressure measurements are taken twice per second. When operating in peak mode, sampling frequency increases to 5 kHz with 16 bit resolution.
The LEO 5 interfaces with a PC via USB connectivity, allowing access to active measurements and recorded data including pressure, peak pressure, temperature, and measurement interval. PC connection also allows device configuration, firmware updates, and recharging of the integral accumulator power supply.
The unique modular design of the LEO 5 makes possible adaptation to customer-specific measuring requirements.
Castello… is a device to measure and display digitally the liquid content of any tank.
Castello… comprises an electronics enclosure and a pressure transmitter for level measurement.
Castello… adapts to unlimited tank shapes and sizes, offers high accuracy.
Castello… is fully waterproof while providing measurement relative to atmospheric pressure.
Castello… can be used as digital display for any 3-wire voltage output transmitter
The EV-120 is a digital pressure indicator, designed for use in conjunction with a KELLER Series 30 transmitter. Together, these two instruments build a highly precise pressure measuring device. At startup, the EV-120 communicates with the Series 30 transmitter and displays the full-scale pressure range of the transmitter, then displays the current pressure value, updating twice per second.
No manual adjustments are required; the EV-120 automatically configures itself to any Series 30 transmitter. Because the pressure is communicated and read in digital format, there are no signal conversion errors.