Multispan (India, since 1986) manufactures control and protection instruments: PID temperature controllers (TC), Cryo refrigeration controllers (CC), humidity controllers (MHC/MHT), protection and motor-protection relays (VPR/SVR/SPP/VMR/OLR/MPD-192), timers and counters, panel and energy meters, SMPS power supplies (PS), water level controllers (WLC) and data loggers.
What products does Multispan make?
Multispan manufactures electronic control and protection instruments across roughly ten families: PID and ON/OFF temperature controllers (TC series), Cryo refrigeration and cooling controllers (CC series), humidity and combined temperature-humidity controllers (MHC/MHT), single- and three-phase protection relays (VPR/SVR/SPP/VMR/VR), motor-protection and overload relays (MPD-192, OLR 50100), timers and counters (DT/DI series), panel and energy meters, DIN-rail SMPS power supplies (PS series), water level controllers (WLC) and multi-channel data loggers/temperature scanners (MS series). Founded in Ahmedabad, India in 1986, the company runs in-house SMT assembly and injection moulding, holds 200+ standard products and a 30-member R&D division, and distributes to 25+ countries. In the UAE the full catalogue is stocked in Dubai by authorized distributor Al Misbah Al Sehri.
Which Multispan temperature controller do I need (TC series and PID)?
Choose a Multispan temperature controller by sensor type, output and control mode. The TC series — for example the TC 510 (ordering code TC 510-A2-01-W) — provides digital ON/OFF and PID temperature control for ovens, incubators, heat-treatment, plastics extrusion and process heating. Multispan controllers accept thermocouple (J and K type) and RTD (PT-100) inputs and drive relay or SSR outputs, with higher models offering RS-485 Modbus for BMS/SCADA integration. PID control continuously modulates the output to hold a tight setpoint and minimise overshoot, which suits precision ovens and reactors; ON/OFF control suits simpler heating and ambient duties. Before ordering, fix three things: the process temperature range, the sensor (J/K thermocouple or PT-100), and the supply voltage — the single most common cause of a wrong part number.
How do the Cryo CC refrigeration controllers differ (CC 510 to CC 552)?
The Cryo CC family is Multispan's refrigeration range for cold rooms, chillers, freezers and supermarket display cabinets, and the variants differ by output count and function. CC 510 and CC 520 are single-relay cooling controllers; CC 512 and CC 522 add an alarm output; CC 515 and CC 525 add a buzzer; CC 521 adds a heater output for defrost. CC 524 combines cooling, fan and defrost control, while CC 552 drives dual compressors. Ordering codes follow the pattern CC 510-B1-01-W, with compressor outputs typically rated 10 A to 20 A and NTC probe sensing. In the UAE these controllers are widely specified for cold stores, catering, pharmacy fridges and food-retail cabinets. Confirm the probe type and supply voltage, and match the relay rating to your compressor before selecting a model.
What are the Multispan humidity controllers (MHC and MHT)?
Multispan humidity controllers regulate relative humidity, and the combined MHT models control humidity and temperature together in one instrument. The MHC 512 (ordering code MHC-512-B1-01-W) is a dedicated humidity controller for humidifiers, dehumidifiers and RH-critical rooms. The MHT-1202 and MHT-9044 are combined temperature-and-humidity controllers that hold both variables from a single panel-mount unit. Typical UAE applications include mushroom and agricultural growing rooms, cold-store humidity control, incubators, textile and printing environments, tissue-culture labs, and museum or archive storage where both dew point and temperature matter. Selection hinges on whether you need humidity alone or humidity plus temperature, the humidity sensor supplied, and the number and rating of control outputs (humidify, dehumidify, heat, cool). Specify the supply voltage and mounting cut-out when ordering.
Which Multispan protection relay protects my motor or supply?
Match the Multispan protection relay to the load's phase configuration and the fault you need to guard against. For single-phase loads, the SVR-22U single-phase voltage relay, the SPP-22 / V22-RYB single-phasing preventor and the compact VPR-22U watch under- and over-voltage. Three-phase installations use VMR-132, VMR-232, VPR-33, VPR-35, VR-3K or VR-3KN, which add phase-sequence and phase-failure (single-phasing) protection to guard pumps, compressors and three-phase equipment against grid dips and phase loss. For full motor cover — overload, current unbalance, single-phasing and earth fault — specify the MPD-192 motor-protection relay (code MPD-192-A2-100), or the OLR 50100 overload relay with its built-in current transformer. Always match the voltage window and CT/current rating to the actual motor rather than the panel, and confirm the auxiliary contact arrangement.
What timers and counters does Multispan offer (DT and DI series)?
Multispan supplies DIN-rail timers and counters for sequencing, star-delta changeover, cyclic control and process counting. The DT Series is a fixed-range ON/OFF delay timer supplied to a set interval — DT-10S, DT-30S and DT-60S for seconds, DT-15M and DT-30M for minutes — so you order exactly the range required. Where one part must cover several ranges, the DI-22 is a multi-range adjustable delay timer, and the DI-22U adds a universal-supply input that runs across a wide AC/DC voltage band, simplifying stock-holding. Multispan also makes preset counters and process counters for production counting and batch control. Before selecting, decide the timing range, the function (ON-delay, OFF-delay or cyclic), and the control voltage; for counters, confirm the input signal type and whether you need a preset/relay output.
What are Multispan panel meters, energy meters and SMPS power supplies?
Multispan makes panel-mount measuring instruments and DIN-rail SMPS power supplies that support the controllers and relays above. The metering range covers digital panel meters (voltmeters, ammeters and frequency meters), multifunction meters (MFM series) that display voltage, current, power, power factor and energy on one screen, and energy meters for kWh billing and sub-metering — many with RS-485 Modbus for BMS integration. The PS SMPS range provides regulated DC for control circuits: choose voltage first — 24 V is the panel default (PS24-1A to PS24-10A), with 12 V (PS12-1A to PS12-8A), 15 V (PS15-5A) and 48 V (PS48-2.5A) options — then current. Ratings run 10 W (PS10-1A) to 240 W (PS24-10A), with up to >93% efficiency and hiccup-mode short-circuit protection. Add about 30% headroom over your load.
What do Multispan water level controllers and data loggers do?
Multispan water level controllers automate tank and sump pumping, while the MS data logger records and displays multi-point temperature. The WLC 22 manages a single tank and the WLC 35 handles a two-tank fill-and-transfer arrangement, both using conductive electrodes with adjustable sensitivity and trip delay to prevent dry running and overflow — common on UAE villas, buildings and irrigation systems. For monitoring, the MS 5716RU (code MS 5716RU-M1) is a 16-channel temperature scanner and data logger that displays each channel, records the trend and supports USB pen-drive logging to Excel with RS-485 Modbus output, suiting cold stores, ovens, incubators and QC rooms where many points must be logged for HACCP or process records. Specify the number of tanks for level control, and the sensor type per channel plus logging interval for the scanner.
