A Product by Pulsar Process Measurement

Blackbox 134 is a compact low-cost intelligent controller that provides non-contacting level measurement. The Blackbox 134 Level Comms features two control or alarm relays, with simple 0-5V output proportional to level to drive a local display and also features a RS485 Modbus port for digital communications.


  • Compact low cost intelligent controllers
  • Will operate on all dB transducers up to 40m (130ft) range
  • Solids, powders and liquids level measurement
Standard Wall Mount Enclosure:
Outside dimensions:130 x 150 x 63.5mm (5.12 x 5.9 x 2.5in)
Weight:nominal 0.65kg (1.4lbs)
Cable entry detail:Underside fitted with 3 x M20, nylon cable glands suitable for 6-12mm cable, two x 15mm x 13mm rear knockouts
Large Wall Mount Enclosure:
Outside dimensions:130 x 180 x 85mm (5.12 x 7.09 x 3.35in)
Weight:Nominal 0.75kg (1.65lbs)
Cable entry detail:Underside fitted with 3 x M20, nylon cable glands suitable for 6-12mm cable
Enclosure material/description:ABS Base with polycarbonate lid, flammable rating UL94HB
Transducer cable extensions:2-core screened (2 conductor 20AWG screened)
Nominal separation:1000m (3280ft)
IP rating:IP66/67
Max. & min. temperature (electronics):-20ºC to +55ºC (-4ºF to +131ºF)
Flammable atmosphere approval:All Blackbox units must be mounted in a safe area. Compatible with approved dB Transducers
Accuracy:0.1% of maxmimum range
Resolution:dBMACH3 0.25mm, dB3 0.5mm, dB6 and dB10 1mm, dB15 1.5mm, dB25 2.5mm and dB40 5mm
Range:Dependent upon transducer. Nominally 125mm to 40m (0.41-130ft). Compatability with all dB transducers
Rate response:Fully adjustable
Description:DATEM (Digital Adaptive Tracking of Echo Movement)
Serial port (Digital output):RS232 for programming and data extraction
RS485 providing Modbus RTU communications
Volt free contacts:2 form "C" (SPDT) rated at 2A at 240V AC
Display (optional):2 x 12 alpha numeric
PC programming (standard):Via RS232 using supplied software
Remote programming (optional):Via RS232 using optional hand held calibrator
Onboard programming (optional):Via integral keypad
Programming security:Via passcode (user selectable and adjustable)
Programmed data integrity:Via non-volatile RAM
Power Supply:115V ac +5%/-10% 50-60Hz
230V ac +5%/-10% 50-60Hz
10-28V DC
10W maximum power (typically 5W)
Fuses:50mA at 230V ac nominal
100mA at 115V ac nominal
Power supply:Power supplied via Blackbox RS232 interface